CN117949327A

CN117949327A - Device, method and system for testing dynamic compression mechanical property of metal material

Info

Publication number: CN117949327A
Application number: CN202410348198.6A
Authority: CN
Inventors: 刘丽君; 李迅; 谭成文; 于晓东; 刘强; 党建伟; 李玉德
Original assignee: Haipu Precision Materials Suzhou Co ltd
Current assignee: Haipu Precision Materials Suzhou Co ltd
Priority date: 2024-03-26
Filing date: 2024-03-26
Publication date: 2024-04-30

Abstract

The invention relates to the technical field of compression performance testing, and provides a device, a method and a system for testing dynamic compression mechanical properties of metal materials, wherein the device comprises a driving device, an impact rod, an incident rod and a transmission rod which form a separated Hopkinson pressure bar system, a suspension clamp and a temperature regulating device; the suspension clamp suspends and assembles the test sample between the incident rod and the transmission rod; the temperature regulating device is used for independently controlling the temperature of the test sample; the driving device drives the incident rod to move towards the transmission rod under the condition that the air chamber drives the impact rod to impact the incident rod, so that the incident rod and the transmission rod clamp the test sample. The design of the special test sample temperature regulating device not only has the basic functions of rapid temperature rise/reduction, stable temperature control and the like, but also realizes the cooperation with the automatic pair rod driving device and the high-efficiency operation; the development of the special automatic rod driving device realizes the automatic alignment of the rod piece, avoids manual operation, improves the experimental safety, reduces the cooling time of the test sample and improves the accuracy of the experimental result.

Description

Device, method and system for testing dynamic compression mechanical property of metal material

Technical Field

The invention relates to the technical field of compression performance testing, in particular to a device, a method and a system for testing dynamic compression mechanical properties of a metal material.

Background

The dynamic mechanical property parameters of the material are basic data for researching structural impact responses such as traffic collision, space debris collision, weapon damage and the like. The compression performance of the material under high strain rate reflects the mechanical characteristics of plastic flow, strain rate effect and the like of the material under dynamic compression load, is a key material parameter in structural design, optimization and manufacture, and is an important parameter for establishing a large deformation constitutive model of the material and a failure criterion.

The structural design difficulty of the traditional room temperature separation type Hopkinson pressure bar (Split Hopkinson Pressure Bar, SHPB) device is as follows: ① The heating and cooling of the incident rod and the transmission rod are very easy to be caused in the heating and cooling process of the sample, so that the physical performance of the rod piece is influenced, the error of a calculation result is large, the loss of the rod piece is accelerated, and the cost of system maintenance and overhaul is greatly increased; ② The very temperature SHPB test makes it difficult to perform manual stem alignment at room temperature, which causes a serious deviation of the actual test temperature of the specimen from the expected value to affect the accuracy of the experimental result, and thus requires the development of a dedicated driving device for automatic stem alignment.

Therefore, the existing very-temperature high strain rate test system has the defects of high cost and low test precision.

Disclosure of Invention

The invention provides a device, a method and a system for testing dynamic compression mechanical properties of a metal material, which are used for solving the defects of high cost and low testing precision of a normal temperature high strain rate testing system in the prior art.

The invention provides a dynamic compression mechanical property testing device for a metal material, which comprises a separated Hopkinson pressure bar system, a suspension clamp and a temperature regulating device; the split Hopkinson pressure bar system comprises a driving device, an impact bar, an incident bar and a transmission bar;

The suspension clamp suspends and assembles the test sample between the incidence rod and the transmission rod;

The temperature regulating device is used for independently controlling the temperature of the test sample;

The driving device drives the incidence rod to move towards the transmission rod under the condition that the air chamber drives the impact rod to impact the incidence rod, so that the incidence rod and the transmission rod clamp the test sample.

According to the device for testing the dynamic compression mechanical property of the metal material, the driving device comprises a monofilament screw guide rail and a motor;

A baffle is arranged on the top of a telescopic rod matched with the monofilament screw guide rail, and a protruding part is arranged on the incident rod;

the motor drives the telescopic rod to move in the monofilament screw guide rail, so that the baffle plate is in close contact with the protruding part, and the incident rod is pushed to move towards the transmission rod, so that the incident rod and the transmission rod clamp the test sample.

According to the device for testing the dynamic compression mechanical property of the metal material, provided by the invention, the temperature regulating device comprises a heating device and/or a cooling device;

The heating device independently heats the test sample and then keeps the temperature;

and the cooling device independently cools the test sample and keeps the temperature.

According to the metal material dynamic compression mechanical property testing device provided by the invention, the heating device is a box-type resistance furnace with resistance wires distributed along the circumference, a heating channel of the box-type resistance furnace is coaxial with a rod piece, the inner diameter of the heating channel is larger than the outer diameter of the hanging clamp, the size of the heating channel along the loading direction is larger than 5L0, and L0 is the initial length of the test sample;

The heating device is provided with a supporting device which moves perpendicular to the loading direction of the Hopkinson pressure bar.

According to the metal material dynamic compression mechanical property testing device provided by the invention, the cooling device is the refrigerating box with copper pipes distributed along the circumference, the refrigerating medium of the refrigerating box is liquid nitrogen input along the copper pipes, the refrigerating channel of the refrigerating box is coaxial with the rod piece, the inner diameter of the refrigerating channel is larger than the outer diameter of the hanging clamp, the size of the refrigerating channel along the loading direction is larger than 5L0, and L0 is the initial length of the test sample;

The cooling device is provided with a supporting device which moves perpendicular to the loading direction of the Hopkinson pressure bar.

According to the device for testing the dynamic compression mechanical property of the metal material, which is provided by the invention, the suspension clamp comprises a sleeve and a suspension beam;

the inner diameter of the sleeve is determined based on the diameter of the incident rod, and the outer diameter of the sleeve is determined based on the cranial cavity inner diameter of the temperature regulating device;

The length of the suspension beam is determined based on the axial size of the furnace chamber, the length of the suspension beam is set to be the sum of half of the axial size of the furnace chamber and a preset threshold value, and the value range of the preset threshold value is 20-50 mm.

The device for testing the dynamic compression mechanical property of the metal material provided by the invention further comprises a computer, wherein the computer is in communication connection with the driving device;

the computer generates a driving control instruction based on the driving parameters and transmits the driving control instruction to the driving device;

The driving device drives the incident rod to move towards the direction of the transmission rod based on the driving control instruction so as to clamp the incident rod and the transmission rod to the test sample;

the driving parameters comprise a driving feed rate, a driving travel distance, a delay trigger time and an experimental preloading pressure;

The delay trigger time is determined by the following formula:

Delay trigger time = drive travel distance/drive feed rate-launch tube length/strike bar rate-incident bar length/incident bar one-dimensional stress longitudinal wave velocity.

The invention also provides a method for testing the dynamic compression mechanical property of the metal material, which comprises the following steps:

After the air chamber drives the impact rod to impact the incident rod and the temperature adjusting device to independently control the temperature of the test sample, the test sample is insulated, and then a driving control instruction is generated based on driving parameters; the driving parameters comprise a driving feed rate, a driving travel distance, a delay trigger time and an experimental preloading pressure; the suspension clamp suspends and assembles the test sample between the incidence rod and the transmission rod;

transmitting the driving control instruction to a driving device, so that the driving device drives the incident rod to move towards the transmission rod based on the driving control instruction, and the incident rod and the transmission rod clamp the test sample;

and driving the incident rod to move towards the direction of the transmission rod based on the driving control instruction by the driving device so as to enable the incident rod and the transmission rod to clamp the test sample, ending the heat preservation of the test sample, collecting experimental data of the test sample, and obtaining a wide-temperature-range high-strain-rate compression performance test result based on the experimental data.

The invention also provides a dynamic compression mechanical property test system for the metal material, which comprises the following steps:

the driving control instruction generating unit is used for generating driving control instructions based on driving parameters after the air chamber drives the impact rod to impact the incident rod and the temperature adjusting device to independently control the temperature of the test sample and then keep the test sample warm; the driving parameters comprise a driving feed rate, a driving travel distance, a delay trigger time and an experimental preloading pressure; the suspension clamp suspends and assembles the test sample between the incidence rod and the transmission rod;

The driving unit is used for transmitting the driving control instruction to a driving device so that the driving device drives the incident rod to move towards the transmission rod based on the driving control instruction, and the incident rod and the transmission rod clamp the test sample;

And the performance testing unit is used for driving the incident rod to move towards the direction of the transmission rod based on the driving control instruction so as to finish heat preservation of the test sample after the incident rod and the transmission rod clamp the test sample, collecting experimental data of the test sample and obtaining a wide-temperature-range high-strain-rate compression performance testing result based on the experimental data.

The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the dynamic compression mechanical property testing method of any one of the metal materials when executing the program.

The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for dynamic compression mechanical properties testing of a metallic material as described in any of the above.

The invention also provides a computer program product, comprising a computer program which is executed by a processor to realize the dynamic compression mechanical property testing method of the metal material.

The invention provides a device, a method and a system for testing dynamic compression mechanical properties of a metal material, wherein the device for testing dynamic compression mechanical properties of the metal material comprises a separated Hopkinson pressure bar system, a suspension clamp and a temperature adjusting device; the split Hopkinson pressure bar system comprises a driving device, an impact bar, an incident bar and a transmission bar, a test sample is hung and assembled between the incident bar and the transmission bar by a hanging clamp, the temperature of the test sample is independently controlled by a temperature adjusting device, and the driving device drives the incident bar to move towards the transmission bar under the condition that the impact bar is driven by an air chamber to impact the incident bar, so that the incident bar and the transmission bar clamp the test sample. Firstly, the design of the suspension clamp can effectively avoid the rod piece and the test sample from being heated or cooled together, so that the accuracy of experimental parameters is improved, the loss of the rod piece is reduced, and the cost of compression performance test is reduced; secondly, the design of the temperature regulating device for the special test sample not only has the basic functions of rapid temperature rise/reduction, stable temperature control and the like, but also realizes the cooperation with the automatic lever driving device and the high-efficiency operation, thereby improving the efficiency of the compression performance test; finally, the special automatic rod driving device is developed, automatic alignment of the rod piece is achieved, manual operation is avoided, experimental safety is improved, test sample cooling time is shortened, accuracy of experimental results is further improved, and the device can achieve efficient and high-precision measurement of material compression performance in a wide temperature range of-200-800 ℃ and a high strain rate range of 1000-5000/s.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a dynamic compression mechanical property testing device for metal materials;

FIG. 2 is a schematic illustration of the clamping of a test sample by an incident beam and a transmissive beam provided by the present invention;

FIG. 3 is a second schematic diagram of a dynamic compression mechanical property testing device for metal materials according to the present invention;

FIG. 4 is a schematic flow chart of a method for testing dynamic compression mechanical properties of a metal material according to the present invention;

FIG. 5 is a second flow chart of the dynamic compression mechanical property test method of the metal material provided by the invention;

FIG. 6 is a schematic structural diagram of a dynamic compression mechanical property test system for metal materials provided by the invention;

fig. 7 is a schematic structural diagram of an electronic device provided by the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the related art, a Hopkinson compression test is a main test method for researching the mechanical performance of a material within a strain rate range of 10 ²~10⁴s^-1, and based on one-dimensional elastic stress wave and sample stress and strain distribution uniformity assumption, the stress-displacement-time relationship between a waveguide rod and the end face of a sample is solved according to a one-dimensional wave propagation theory, so that the stress-displacement-strain relationship of the sample is obtained. The test device has the characteristics of simple structure, exquisite measurement method, convenient operation and easy control of loading waveforms.

Part of the materials are inevitably faced with coupling environments with very high temperature-high strain rate in the actual service process as structural components, for example, steel is widely applied to the fields of machinery, construction, ships, weapon industry and the like, and under certain conditions, the materials can be subjected to complex actions of high temperature-high strain rate (such as blasting) or low temperature-high strain rate (such as polar environment), and the dynamic mechanical properties of the materials are quite different from the normal temperature conditions.

The related equipment and technical methods of the room temperature Hopkinson (Hopkinson) compression test have tended to mature through long-term development, and related standard and commercial test devices are formed. However, the development of Hopkinson compression test is relatively slow at very normal temperature, and the problems of complex system, high equipment loss rate, unstable control system and experimental conditions and the like exist, so that the research and application of structural materials in the aspect of normal temperature-high strain rate loading are seriously restricted.

The structural design difficulty of the traditional room temperature separation type Hopkinson pressure bar device is as follows: ① The heating and cooling of the incident rod and the transmission rod are very easy to be caused in the heating and cooling process of the sample, so that the physical performance of the rod piece is influenced, the error of a calculation result is large, the loss of the rod piece is accelerated, and the cost of system maintenance and overhaul is greatly increased; ② The very temperature SHPB test makes it difficult to perform manual stem alignment at room temperature, which causes a serious deviation of the actual test temperature of the specimen from the expected value to affect the accuracy of the experimental result, and thus requires the development of a dedicated driving device for automatic stem alignment.

Currently, ① adopts a pulse power supply and a pulse electromagnetic force to heat and load the titanium alloy at a high strain rate in the literature on a very-temperature high strain rate loading experimental method and equipment; ② A unique very temperature high strain rate tensile test device comprising a DIC (DIGITAL IMAGE corestation) full field strain test system and a pressure sensor; however, the test equipment and the test method mentioned in ① and ② are not based on room temperature SHPB equipment, so that the equipment cost is high and the experimental operation is complex; ③ The liquid nitrogen cooling channel and the temperature control unit are additionally arranged on the traditional room temperature SHPB device, so that the low-temperature high-strain rate compression performance test is realized, the incident rod and the transmission rod are cooled together, larger calculation result errors are caused, and the rod loss is accelerated; ④ The automatic pole setting device applied to the SHPB system is designed and ⑤ the heating device applied to the SHPB system is designed. ④ And ⑤ room temperature-based SHPB equipment, which respectively aim at 2 design difficulties of the very temperature SHPB device in structure, so that part of problems are solved. However, in practice, if different device components are designed separately, it is difficult to ensure stable cooperation and operation between them, and more importantly, the overall control method and program for system operation are key to ensuring stable operation and high experimental accuracy of the normal temperature dynamic test experiment. At present, related documents are not available, which completely solve the problems, and low-cost and high-precision normal temperature and high strain rate testing equipment is obtained.

Aiming at the problems of high cost and low test precision of the existing very-temperature high strain rate test system, the invention provides a dynamic compression mechanical property test device for a metal material, and fig. 1 is one of the structural schematic diagrams of the dynamic compression mechanical property test device for the metal material, provided by the invention, and as shown in fig. 1, the device comprises a separated Hopkinson pressure bar system, a suspension clamp 10 and a temperature regulating device 30; the split hopkinson pressure bar system comprises a driving device 20, an impact bar 02, an incident bar 40 and a transmission bar 50;

the suspension clamp 10 suspends and assembles the test sample 04 between the incidence rod 40 and the transmission rod 50;

The temperature regulating device 30 independently controls the temperature of the test sample 04;

The driving device 20 drives the incident rod 40 to move toward the transmission rod 50 in the case that the air chamber 01 drives the striking rod 02 to strike the incident rod 40, so that the incident rod 40 and the transmission rod 50 clamp the test sample 04.

Specifically, the device for testing dynamic compression mechanical properties of metal materials comprises a suspension clamp 10, a driving device 20, a temperature adjusting device 30, an incidence rod 40 and a transmission rod 50.

Wherein the suspension fixture 10 suspends the test sample 04 between the incident rod 40 and the transmission rod 50. The suspension clamp 10 may include a sleeve and a suspension beam.

The material of the test sample may be a forged TA15 titanium alloy (Forged TA), or a forged TA15 titanium alloy and a hot isostatic pressed TA15 titanium alloy (HIP TA 15) may be used, and the material may be processed into a universal dynamic compression test sample with a size of Φ4x4mm, which is not particularly limited in the embodiment of the present invention.

It can be understood that the design of the suspension clamp can effectively avoid the rod piece and the test sample to be heated or cooled together, so that the accuracy of experimental parameters is improved, the loss of the rod piece is reduced, and the cost is reduced.

The temperature adjusting device 30 independently controls the temperature of the test sample 04, where the temperature adjusting device may include a heating device, a cooling device, and a heating device and a cooling device, which are not particularly limited in this embodiment of the present invention.

It should be noted that, the temperature adjusting device 30 can realize a wide temperature range of-200 to 800 ℃, i.e. a room temperature test, so as to widen the temperature range of the compression performance test.

It should be noted that, the design of the temperature adjusting device for the special test sample realizes the cooperation with the automatic lever driving device and the high-efficiency operation besides the basic functions of rapid temperature rise/reduction, stable temperature control and the like.

In addition, disconnect-type hopkinson depression bar system still includes absorption pole 09, and absorption pole 09 is used for avoiding the test sample to receive multiple impact loading, and absorption pole 09 can effectively reduce the reflection of shock wave in the depression bar system to guarantee the accuracy of test result, and, absorption pole 09 can also protect experimental facilities and operating personnel safety.

Fig. 2 is a schematic view of clamping a test sample by using the incident rod and the transmission rod provided by the invention, and as shown in fig. 2, the driving device 20 drives the incident rod 40 to move towards the transmission rod 50 so that the incident rod 40 and the transmission rod 50 clamp the test sample when the air chamber 01 drives the impact rod 02 to impact the incident rod 40. Wherein the striking rod 02 is launched in the launch tube 03.

It can be understood that on one hand, the impact rod impacts the incident rod to realize high strain rate loading on a test sample, and high-efficiency and high-precision measurement of the compression performance of the material in a high strain rate range of 1000-5000/s can be realized; on the other hand, the development of special automatic pole driving device realizes the automatic alignment of member, avoids manual operation, promotes experimental security and reduces test sample cooling time, and then promotes the accuracy of experimental result.

The device provided by the embodiment of the invention comprises a split Hopkinson pressure bar system, a suspension clamp and a temperature adjusting device, wherein the metal material dynamic compression mechanical property testing device comprises a metal material dynamic compression mechanical property testing device, a metal material dynamic compression mechanical property testing device and a metal material dynamic compression mechanical property testing device; the split Hopkinson pressure bar system comprises a driving device, an impact bar, an incident bar and a transmission bar, a test sample is hung and assembled between the incident bar and the transmission bar by a hanging clamp, the temperature of the test sample is independently controlled by a temperature adjusting device, and the driving device drives the incident bar to move towards the transmission bar under the condition that the impact bar is driven by an air chamber to impact the incident bar, so that the incident bar and the transmission bar clamp the test sample. Firstly, the design of the suspension clamp can effectively avoid the rod piece and the test sample from being heated or cooled together, so that the accuracy of experimental parameters is improved, the loss of the rod piece is reduced, and the cost of compression performance test is reduced; secondly, the design of the temperature regulating device for the special test sample not only has the basic functions of rapid temperature rise/reduction, stable temperature control and the like, but also realizes the cooperation with the automatic lever driving device and the high-efficiency operation, thereby improving the efficiency of the compression performance test; finally, the special automatic rod driving device is developed, automatic alignment of the rod piece is achieved, manual operation is avoided, experimental safety is improved, test sample cooling time is shortened, accuracy of experimental results is further improved, and the device can achieve efficient and high-precision measurement of material compression performance in a wide temperature range of-200-800 ℃ and a high strain rate range of 1000-5000/s.

Based on the above embodiment, the driving device comprises a monofilament screw guide rail and a motor;

Specifically, the drive 20 includes a monofilament screw guide and a motor.

A baffle is arranged on the top of a telescopic rod matched with the monofilament screw guide rail, a protruding part is arranged on an incident rod, and under the action of a driving device, a motor drives the telescopic rod to move in the monofilament screw guide rail, so that the baffle is in close contact with the protruding part to push the incident rod to move towards the direction of a transmission rod, and the incident rod and the transmission rod clamp a test sample.

The protruding portion may be a clip, or may be a connecting piece such as a bolt, a screw, a flange, or a pipe joint, which is not particularly limited in the embodiment of the present invention.

Based on the above embodiments, the temperature regulating device comprises a heating device and/or a cooling device;

In particular, the temperature adjustment device 30 comprises a heating device and/or a cooling device, wherein the heating device independently heats and keeps the test sample, i.e. the independent heating and the heat preservation of the test sample can be realized at a proper heating rate and for a proper heat preservation time.

The cooling device independently cools and keeps the temperature of the test sample, and the independent cooling and the heat preservation of the test sample can be realized at a proper cooling rate and for a proper heat preservation time.

If room temperature testing is performed, the heating device and the cooling device are omitted.

The device provided by the embodiment of the invention realizes the matched use and high-efficiency operation with the automatic pair rod driving device besides the basic functions of rapid temperature rise/reduction, stable temperature control and the like by the design of the special test sample heating device and the special test sample cooling device.

Based on the above embodiment, the heating device is a box-type resistance furnace with resistance wires distributed along the circumference, a heating channel of the box-type resistance furnace is coaxial with the rod piece, the inner diameter of the heating channel is larger than the outer diameter of the hanging clamp, the dimension of the heating channel along the loading direction is larger than 5L0, and L0 is the initial length of the test sample;

Specifically, the heating device is a box-type resistance furnace with resistance wires distributed along the circumference, wherein a heating channel of the box-type resistance furnace is coaxial with the rod piece, the inner diameter of the heating channel is larger than the outer diameter of the suspension clamp 10, the size of the heating channel along the loading direction is larger than 5L0, and L0 is the initial length of the test sample.

The maximum size range of the box-type resistance furnace in the vertical direction is 200-240 mm, the maximum size range along the loading direction is 50-80 mm, and the inner diameter size of the heating channel is 12-20 mm. The on-off of the heating circuit is controlled by a temperature control program, so that the purposes of rapid temperature rise and stable temperature control are achieved.

The heating device is provided with a supporting device which moves perpendicular to the loading direction of the Hopkinson pressure bar, wherein the supporting device can be a sliding rail, the movable distance of the sliding rail is 150-350 mm, and the embodiment of the invention is not limited in particular.

Here, the hopkinson pressure bar includes an incident bar and a transmission bar, and the loading direction of the hopkinson pressure bar refers to the acting direction of the incident wave to the test sample in the experiment.

Based on the above embodiment, the cooling device is a refrigeration box with copper pipes distributed along the circumference, the refrigeration medium of the refrigeration box is liquid nitrogen input along the copper pipes, the refrigeration channel of the refrigeration box is coaxial with the rod piece, the inner diameter of the refrigeration channel is larger than the outer diameter of the suspension clamp, the dimension of the refrigeration channel along the loading direction is larger than 5L0, and L0 is the initial length of the test sample;

Specifically, the cooling device is a refrigeration box with copper pipes distributed along the circumference, the refrigeration medium of the refrigeration box is liquid nitrogen input along the copper pipes, the refrigeration channel of the refrigeration box is coaxial with the rod piece, the inner diameter of the refrigeration channel is larger than the outer diameter of the suspension clamp 10, the size of the refrigeration channel along the loading direction is larger than 5L0, and L0 is the initial length of the test sample.

The maximum size range of the refrigerating box in the vertical direction is 200-240 mm, the maximum size range along the loading direction is 50-80 mm, and the inner diameter size of the cooling channel is 12-20 mm. The opening and closing of the electromagnetic valve of the liquid nitrogen container are controlled by a temperature control program, so that the purposes of rapid temperature reduction and stable temperature control are achieved.

The cooling device is provided with a supporting device which moves perpendicular to the loading direction of the Hopkinson pressure bar. The supporting device may be a sliding rail, and the movable distance of the sliding rail is 150-350 mm, which is not particularly limited in the embodiment of the present invention.

Based on the above embodiment, the suspension clamp 10 includes a sleeve and a suspension beam;

Specifically, the suspension clamp 10 comprises a sleeve and a suspension beam, wherein the inner diameter of the sleeve is determined based on the diameter of the incident rod, and the outer diameter of the sleeve is determined based on the inner diameter of the oven cavity of the temperature regulating device 30, i.e. the outer diameter of the sleeve is determined based on the inner diameter of the cranial cavity of the heating device or the cooling device.

The length of the suspension beam is determined based on the axial size of the furnace chamber, and the length of the suspension beam is set to be the sum of half of the axial size of the furnace chamber and a preset threshold value, wherein the value range of the preset threshold value is 20-50 mm.

Based on the above embodiment, the device further comprises a computer, wherein the computer is in communication connection with the driving device 20;

The delay trigger time is determined by the following formula:

Specifically, a computer is communicatively connected to the driving device 20, and the computer generates a driving control instruction based on the driving parameter and transmits the driving control instruction to the driving device 20.

The driving device 20 drives the incident beam toward the transmission beam based on the driving control command so that the incident beam and the transmission beam clamp the test sample.

Wherein the drive parameters include drive feed rate, drive travel distance, delay trigger time, and experimental preload pressure.

Here, the drive feed rate may be set to 20000, 30000, or the like, which is not particularly limited in the embodiment of the present invention.

The driving travel distance may be set to 100mm, 120mm, or the like, and the embodiment of the present invention is not particularly limited thereto.

The delay trigger time may be set to 0.8s, or may be set to 0.3s, etc., which is not particularly limited in the embodiment of the present invention.

The experimental preloading pressure may be set to 0.2Mpa, 0.3Mpa, etc., which is not particularly limited in the embodiment of the present invention.

The driving travel distance is determined by the axial dimension of the furnace chamber, and is 20-50 mm in addition to the axial dimension of the furnace chamber.

Delay trigger time is a key factor affecting experimental accuracy, and delay trigger time = drive travel distance/drive feed rate-launch tube length/strike bar rate-incident bar length/incident bar one-dimensional stress longitudinal wave velocity should be satisfied.

The one-dimensional stress longitudinal wave velocity of the incident rod refers to the velocity of elastic waves propagating in the incident rod in a Hopkinson pressure bar experiment. This velocity is often referred to simply as the wave velocity and is used to calculate the stress and strain of the test sample when subjected to an impact load.

In the related art, the structural design difficulty of the very temperature SHPB device is that: the control during the whole operation of the system comprises automatic lever alignment, delayed firing and data acquisition processes, and the control program is required to be relied on for carrying out high-automation cooperation operation so as to ensure the accuracy of the test result.

Based on any of the above embodiments, fig. 3 is a second schematic structural diagram of the dynamic compression mechanical property testing device for metal materials according to the present invention, and as shown in fig. 3, the dynamic compression mechanical property testing device for metal materials includes a suspension fixture 10, a driving device 20, a temperature adjusting device 30, an incident rod 40 and a transmission rod 50.

Wherein the suspension clamp 10 suspends and assembles the test sample 04 between the incident rod 40 and the transmission rod 50;

The driving device 20 drives the incident rod 40 to move toward the transmission rod 50 in a state that the air chamber 01 drives the striking rod 02 to strike the incident rod 40, so that the incident rod 40 and the transmission rod 50 clamp the test sample 04. The drive 20 comprises a monofilament screw guide 07 and a motor 06.

A baffle 08 is arranged on the top of a telescopic rod matched with the monofilament screw guide rail 07, a protruding part 05 is arranged on the incident rod 40, and the motor 06 drives the telescopic rod to move in the monofilament screw guide rail 07, so that the baffle 08 is in close contact with the protruding part 05 to push the incident rod 40 to move towards the transmission rod 50, and the incident rod 40 and the transmission rod 50 clamp the test sample 04.

The temperature adjusting device 30 comprises a heating device and/or a cooling device, wherein the heating device independently heats and keeps the temperature of the test sample, and the cooling device independently cools and keeps the temperature of the test sample.

Here, heating device is box resistance furnace that resistance wire distributes along circumference, and box resistance furnace's heating passageway is coaxial with the member, and the internal diameter of heating passageway is greater than the external diameter of hanging anchor clamps, and the size of heating passageway along loading direction is greater than 5L0, and L0 is the initial length of test sample. The heating device is provided with a supporting device which moves perpendicular to the loading direction of the Hopkinson pressure bar.

Here, cooling device is the refrigeration case of copper pipe along circumference distribution, and the refrigeration medium of refrigeration case is the liquid nitrogen of following the copper pipe input, and the refrigeration passageway of refrigeration case is coaxial with the member, and the internal diameter of refrigeration passageway is greater than the external diameter of hanging anchor clamps, and the size of refrigeration passageway along loading direction is greater than 5L0, and L0 is the initial length of test sample. The cooling device is provided with a supporting device which moves perpendicular to the loading direction of the Hopkinson pressure bar.

The suspension clamp 10 comprises a sleeve and a suspension beam, wherein the inner diameter of the sleeve is determined based on the diameter of the incident rod, and the outer diameter of the sleeve is determined based on the inner diameter of the cranial cavity of the temperature regulating device.

The dynamic compression mechanical property testing device for the metal material further comprises a computer, and the computer is in communication connection with the driving device. The computer generates a drive control command based on the drive parameter and transmits the drive control command to the drive device.

The driving device 20 drives the incident beam 40 to move toward the transmission beam 50 based on the driving control instruction, so that the incident beam 40 and the transmission beam 50 clamp the test sample 04.

The drive parameters include drive feed rate, drive travel distance, delay trigger time, and experimental preload pressure.

The determination formula of the delay trigger time is as follows:

The device provided by the embodiment of the invention, a control method and a program design for the overall operation of the system comprise automatic lever alignment, delayed firing and data acquisition processes, so that the practicability of the test equipment is obviously improved, the delayed firing time and the test sample temperature rise and fall time are effectively reduced, the system error of the test is greatly reduced, and the repeatability of the test result is improved. Compared with the prior art, the device has the advantages that the principle is simple, the operability is strong, the technical advantages of room temperature high strain rate compression performance test are inherited by the device for testing the dynamic compression mechanical properties of the metal material in the aspect of room temperature test, the temperature rise and fall time of the test sample after the clamping action is greatly reduced in the aspect of high temperature and low temperature test, and the accurate control of the actual loading temperature of the test sample is realized. The experimental device used by the invention has the characteristics of simple structure, small equipment loss in the experiment, high control precision and convenient maintenance.

Based on any embodiment, the embodiment of the invention performs three groups of experiments on the basis of the dynamic compression mechanical property testing device of the metal material, and the experiments are as follows:

Embodiment 1: the wide temperature range SHPB equipment provided with the positive and negative screw driving module is used for carrying out room temperature (25 ℃) per 3000s ^-1 dynamic loading.

A wrought TA15 titanium alloy (Forged TA) and a HIP TA15 titanium alloy (HIP TA 15) were used as standard sample materials and processed into universal dynamic compression test samples having dimensions Φ4X4mm. The test sample is fixed on a self-designed suspension sleeve and is assembled at the tail end of an incidence rod, and the incidence rod is moved to place the test sample at a specified position. The feeding rate of the positive and negative screw driving module is 20000, the advancing distance is 100mm, the delay triggering time is 0.8s, and the pressure of the air chamber is 0.2MPa. And starting an experiment program, and automatically completing the work of rod, delay triggering, firing and data acquisition by the system. The dynamic compression test results (stress-strain curves) of Forged TA and HIPTA 15 at 25 ℃/3000s ^-1 were obtained for 4 groups each. Factors that generally affect the reproducibility of test results are the uniformity of the test sample and the stability of the test system. Due to the difference in the preparation modes of the materials, the overall uniformity of the HIPTA 15 material is better than Forged TA. The average rheological stress value deviation of different Forged TA samples is less than 3%, the average rheological stress value deviation of different HIPTA 15 samples is less than 1.5%, and both deviations are at a lower level, which shows that the wide temperature range testing device has higher stability and experimental precision under the room temperature condition on the basis of considering the uniformity of the testing samples.

Embodiment 2: and dynamically loading 200-800 ℃/3000s ^-1 by using a wide-temperature-range SHPB device provided with a positive and negative screw driving module.

A conventional dynamic compression test specimen having a dimension of Φ4X4 mm was processed using as a standard specimen material a wrought TA15 titanium alloy (Forged TA). The test sample was fixed on a self-designed suspension sleeve and assembled to the end of the incident beam, and the incident beam was moved to place the sample at a prescribed position and to ensure that the end face of the incident beam was spaced from the center of the furnace by =100 mm. The transmission rod was moved and the distance of the front end face of the transmission rod from the center of the heating furnace was ensured=100 mm. Heating the sample to 200, 400, 600 and 800 ℃ respectively, heating at a rate of 50 ℃/min, and preserving the temperature for 5min after reaching the temperature. The feeding rate of the positive and negative screw driving module is 20000, the advancing distance is 100mm, the delay triggering time is 0.8s, and the pressure of the air chamber is 0.2MPa. After the sample is insulated, starting an experiment program, and automatically completing the work of rod, delay triggering, firing and data acquisition by the system. 3 groups of test results (stress-strain curve) at 200 and 400 ℃ and 2 groups of test results (stress-strain curve) at 600 and 800 ℃ were obtained. Obviously, the test results at 200 and 400 ℃ have better repeatability, but the test results at 600 and 800 ℃ are unstable, which shows that the wide-temperature-range SHPB equipment provided with the positive and negative screw driving module has higher experimental precision for the low temperature range of 200 and 400 ℃, but has poor applicability for the high temperature range of 600 and 800 ℃ and needs to be further optimized.

Embodiment 3: and dynamically loading 200-800 ℃/3000s ^-1 by using a wide-temperature-range SHPB device provided with a positive screw driving module.

A conventional dynamic compression test specimen having a dimension of Φ4X4 mm was processed using as a standard specimen material a wrought TA15 titanium alloy (Forged TA). The test sample was fixed on a self-designed suspension sleeve, the incident rod was moved to place the sample at a prescribed position, and the distance of the end face of the incident rod from the center of the heating furnace was ensured=100 mm. Heating the sample to 500, 600, 700 and 800 ℃ respectively, heating at a rate of 50 ℃/min, and preserving the temperature for 5min after reaching the temperature. The feeding rate of the positive and negative screw driving module is 30000, the advancing distance is 120mm, the delay triggering time is 0.3s, and the pressure of the air chamber is 0.2MPa. After the sample incubation was completed, the transmission rod was moved and the distance of the front end face of the transmission rod from the center of the heating furnace was ensured=20 mm. And starting an experiment program, and automatically completing the work of rod, delay triggering, firing and data acquisition by the system. The test results (stress-strain curves) at each temperature were obtained in 4 groups. Obviously, high-temperature dynamic test results at different temperatures have good repeatability, and the application of the positive screw driving module is shown to obviously improve the repeatability of experiments, and through calculation, the error of the average rheological stress value obtained by experimental test at the same temperature is less than 5%, the wide-temperature-range SHPB equipment has practical value, and the wide-temperature-range high-strain rate test experimental flow is determined.

Based on the above embodiments, the present invention provides a method for testing dynamic compression mechanical properties of a metal material, fig. 4 is one of flow charts of the method for testing dynamic compression mechanical properties of a metal material provided by the present invention, fig. 5 is the second of flow charts of the method for testing dynamic compression mechanical properties of a metal material provided by the present invention, and as shown in fig. 4 and 5, the method includes:

step 410, after the air chamber drives the impact rod to impact the incident rod and the temperature adjusting device to independently control the temperature of the test sample, generating a driving control instruction based on the driving parameter; the driving parameters comprise a driving feed rate, a driving travel distance, a delay trigger time and an experimental preloading pressure; the suspension clamp suspends and assembles the test sample between the incidence rod and the transmission rod;

Step 420, transmitting the driving control instruction to a driving device, so that the driving device drives the incident rod to move towards the transmission rod based on the driving control instruction, so that the incident rod and the transmission rod clamp the test sample;

And 430, after the driving device drives the incident rod to move towards the direction of the transmission rod based on the driving control instruction so that the incident rod and the transmission rod clamp the test sample, finishing heat preservation of the test sample, collecting experimental data of the test sample, and obtaining a wide-temperature-range high-strain-rate compression performance test result based on the experimental data.

Specifically, the suspension fixture suspends and mounts the test sample between the incident rod and the transmission rod. It can be understood that the design of the suspension clamp can effectively avoid the rod piece and the test sample to be heated or cooled together, so that the accuracy of experimental parameters is improved, the loss of the rod piece is reduced, and the cost is reduced.

After the air chamber drives the impact rod to impact the incident rod and the temperature adjusting device to independently control the temperature of the test sample, the test sample is insulated, and then a driving control instruction is generated based on the driving parameter.

The temperature adjusting device comprises a heating device and/or a cooling device, wherein the heating device independently heats and keeps the temperature of the test sample, and therefore the independent heating and the heat preservation of the test sample can be realized at a proper heating rate and for a proper heat preservation time.

After generating the driving control command based on the driving parameter, the driving control command may be transmitted to the driving device to cause the driving device to drive the incident beam to move toward the transmission beam based on the driving control command, so that the incident beam and the transmission beam clamp the test sample.

And driving the incident rod to move towards the direction of the transmission rod based on the driving control instruction by the driving device so as to finish heat preservation of the test sample after the incident rod and the transmission rod clamp the test sample, collecting experimental data of the test sample, and obtaining a wide-temperature-range high-strain-rate compression performance test result based on the experimental data.

It should be noted that, the setting of the driving parameters can be based on MATLAB script programming, so that batch reading and processing of the wide-temperature-range high-strain-rate dynamic compression performance test result (stress-strain curve) can be realized, and the average rheological stress, uniform plastic strain and impact absorption work value obtained according to the test result can be rapidly calculated and output.

If room temperature test is performed, the steps of heating/cooling the test sample, insulating the sample and ending the insulating are omitted.

According to the method provided by the embodiment of the invention, after the air chamber drives the impact rod to impact the incident rod and the temperature regulating device to independently control the temperature of the test sample, the test sample is subjected to heat preservation, and then a driving control instruction is generated based on driving parameters; the suspension clamp suspends and assembles the test sample between the incident rod and the transmission rod; and transmitting a driving control instruction to a driving device so that the driving device drives the incident rod to move towards the direction of the transmission rod based on the driving control instruction, so that the incident rod and the transmission rod clamp the test sample, and finally, driving the incident rod to move towards the direction of the transmission rod based on the driving control instruction so that the incident rod and the transmission rod clamp the test sample, then ending the heat preservation of the test sample, collecting experimental data of the test sample, and obtaining a wide-temperature-range high-strain-rate compression performance test result based on the experimental data. Firstly, the design of the suspension clamp can effectively avoid the rod piece and the test sample from being heated or cooled together, so that the accuracy of experimental parameters is improved, the loss of the rod piece is reduced, and the cost of compression performance test is reduced; secondly, the design of the temperature regulating device for the special test sample not only has the basic functions of rapid temperature rise/reduction, stable temperature control and the like, but also realizes the cooperation with the automatic lever driving device and the high-efficiency operation, thereby improving the efficiency of the compression performance test; finally, the development of the special automatic rod driving device realizes the automatic alignment of the rod piece, avoids manual operation, improves the experimental safety, reduces the cooling time of the test sample, and further improves the accuracy of the experimental result.

The dynamic compression mechanical property test system of the metal material provided by the invention is described below, and the dynamic compression mechanical property test system of the metal material and the dynamic compression mechanical property test method of the metal material described below can be correspondingly referred to each other.

Based on any one of the above embodiments, the present invention provides a system for testing dynamic compression mechanical properties of a metal material, and fig. 6 is a schematic structural diagram of the system for testing dynamic compression mechanical properties of a metal material, as shown in fig. 6, where the system includes:

The driving control instruction generating unit 610 is used for generating a driving control instruction based on driving parameters after the air chamber drives the impact rod to impact the incident rod and the temperature adjusting device to independently control the temperature of the test sample and then keep the test sample warm; the driving parameters comprise a driving feed rate, a driving travel distance, a delay trigger time and an experimental preloading pressure; the suspension clamp suspends and assembles the test sample between the incidence rod and the transmission rod;

a driving unit 620 for transmitting the driving control command to a driving device, so that the driving device drives the incident rod to move toward the transmission rod based on the driving control command, so that the incident rod and the transmission rod clamp the test sample;

And the performance testing unit 630 is configured to, after the driving device drives the incident rod to move towards the direction of the transmission rod based on the driving control instruction, so that the incident rod and the transmission rod clamp the test sample, terminate heat preservation of the test sample, collect experimental data of the test sample, and obtain a wide temperature range high strain rate compression performance test result based on the experimental data.

According to the system provided by the embodiment of the invention, after the air chamber drives the impact rod to impact the incident rod and the temperature regulating device to independently control the temperature of the test sample, the test sample is subjected to heat preservation, and then a driving control instruction is generated based on driving parameters; the suspension clamp suspends and assembles the test sample between the incident rod and the transmission rod; and transmitting a driving control instruction to a driving device so that the driving device drives the incident rod to move towards the direction of the transmission rod based on the driving control instruction, so that the incident rod and the transmission rod clamp the test sample, and finally, driving the incident rod to move towards the direction of the transmission rod based on the driving control instruction so that the incident rod and the transmission rod clamp the test sample, then ending the heat preservation of the test sample, collecting experimental data of the test sample, and obtaining a wide-temperature-range high-strain-rate compression performance test result based on the experimental data. Firstly, the design of the suspension clamp can effectively avoid the rod piece and the test sample from being heated or cooled together, so that the accuracy of experimental parameters is improved, the loss of the rod piece is reduced, and the cost of compression performance test is reduced; secondly, the design of the temperature regulating device for the special test sample not only has the basic functions of rapid temperature rise/reduction, stable temperature control and the like, but also realizes the cooperation with the automatic lever driving device and the high-efficiency operation, thereby improving the efficiency of the compression performance test; finally, the development of the special automatic rod driving device realizes the automatic alignment of the rod piece, avoids manual operation, improves the experimental safety, reduces the cooling time of the test sample, and further improves the accuracy of the experimental result.

Fig. 7 illustrates a physical schematic diagram of an electronic device, as shown in fig. 7, which may include: processor 710, communication interface (Communications Interface) 720, memory 730, and communication bus 740, wherein processor 710, communication interface 720, memory 730 communicate with each other via communication bus 740. Processor 710 may invoke logic instructions in memory 730 to perform a metallic material dynamic compression mechanical property testing method comprising: after the air chamber drives the impact rod to impact the incident rod and the temperature adjusting device to independently control the temperature of the test sample, the test sample is insulated, and then a driving control instruction is generated based on driving parameters; the driving parameters comprise a driving feed rate, a driving travel distance, a delay trigger time and an experimental preloading pressure; the suspension clamp suspends and assembles the test sample between the incidence rod and the transmission rod; transmitting the driving control instruction to a driving device, so that the driving device drives the incident rod to move towards the transmission rod based on the driving control instruction, and the incident rod and the transmission rod clamp the test sample; and driving the incident rod to move towards the direction of the transmission rod based on the driving control instruction by the driving device so as to enable the incident rod and the transmission rod to clamp the test sample, ending the heat preservation of the test sample, collecting experimental data of the test sample, and obtaining a wide-temperature-range high-strain-rate compression performance test result based on the experimental data.

Further, the logic instructions in the memory 730 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer can execute a method for testing dynamic compression mechanical properties of a metal material provided by the above methods, and the method includes: after the air chamber drives the impact rod to impact the incident rod and the temperature adjusting device to independently control the temperature of the test sample, the test sample is insulated, and then a driving control instruction is generated based on driving parameters; the driving parameters comprise a driving feed rate, a driving travel distance, a delay trigger time and an experimental preloading pressure; the suspension clamp suspends and assembles the test sample between the incidence rod and the transmission rod; transmitting the driving control instruction to a driving device, so that the driving device drives the incident rod to move towards the transmission rod based on the driving control instruction, and the incident rod and the transmission rod clamp the test sample; and driving the incident rod to move towards the direction of the transmission rod based on the driving control instruction by the driving device so as to enable the incident rod and the transmission rod to clamp the test sample, ending the heat preservation of the test sample, collecting experimental data of the test sample, and obtaining a wide-temperature-range high-strain-rate compression performance test result based on the experimental data.

In still another aspect, the present invention further provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the method for testing dynamic compression mechanical properties of a metal material provided by the above methods, the method comprising: after the air chamber drives the impact rod to impact the incident rod and the temperature adjusting device to independently control the temperature of the test sample, the test sample is insulated, and then a driving control instruction is generated based on driving parameters; the driving parameters comprise a driving feed rate, a driving travel distance, a delay trigger time and an experimental preloading pressure; the suspension clamp suspends and assembles the test sample between the incidence rod and the transmission rod; transmitting the driving control instruction to a driving device, so that the driving device drives the incident rod to move towards the transmission rod based on the driving control instruction, and the incident rod and the transmission rod clamp the test sample; and driving the incident rod to move towards the direction of the transmission rod based on the driving control instruction by the driving device so as to enable the incident rod and the transmission rod to clamp the test sample, ending the heat preservation of the test sample, collecting experimental data of the test sample, and obtaining a wide-temperature-range high-strain-rate compression performance test result based on the experimental data.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The device for testing the dynamic compression mechanical property of the metal material is characterized by comprising a separated Hopkinson pressure bar system, a suspension clamp and a temperature regulating device; the split Hopkinson pressure bar system comprises a driving device, an impact bar, an incident bar and a transmission bar;

2. The device for testing dynamic compression mechanical properties of a metal material according to claim 1, wherein the driving device comprises a monofilament screw guide rail and a motor;

3. The device for testing dynamic compression mechanical properties of metal materials according to claim 1, wherein the temperature adjusting device comprises a heating device and/or a cooling device;

4. The device for testing dynamic compression mechanical properties of metal materials according to claim 3, wherein the heating device is a box-type resistance furnace with resistance wires distributed along the circumference, a heating channel of the box-type resistance furnace is coaxial with a rod piece, the inner diameter of the heating channel is larger than the outer diameter of the hanging clamp, the dimension of the heating channel along the loading direction is larger than 5L0, and L0 is the initial length of the test sample;

5. The device for testing dynamic compression mechanical properties of metal materials according to claim 3, wherein the cooling device is a refrigeration box with copper pipes distributed along the circumference, a refrigeration medium of the refrigeration box is liquid nitrogen input along the copper pipes, a refrigeration channel of the refrigeration box is coaxial with a rod piece, the inner diameter of the refrigeration channel is larger than the outer diameter of the hanging clamp, the dimension of the refrigeration channel along the loading direction is larger than 5L0, and L0 is the initial length of the test sample;

6. The dynamic compressive mechanical property testing apparatus for metallic materials according to any one of claims 1 to 5, wherein the suspension clamp comprises a sleeve and a suspension beam;

7. The dynamic compression mechanical property testing device for a metal material according to any one of claims 1 to 5, further comprising a computer, wherein the computer is in communication connection with the driving device;

The delay trigger time is determined by the following formula:

8. The method for testing the dynamic compression mechanical property of the metal material is characterized by comprising the following steps of:

9. A system for testing dynamic compression mechanical properties of a metal material, comprising:

10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for dynamic compression mechanical property testing of a metallic material according to claim 8 when executing the program.