CN211122349U - Hopkinson pull rod device with dynamic and static combination loading in high-temperature environment - Google Patents
Hopkinson pull rod device with dynamic and static combination loading in high-temperature environment Download PDFInfo
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- CN211122349U CN211122349U CN201920993288.5U CN201920993288U CN211122349U CN 211122349 U CN211122349 U CN 211122349U CN 201920993288 U CN201920993288 U CN 201920993288U CN 211122349 U CN211122349 U CN 211122349U
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Abstract
The utility model discloses a loaded hopkinson pull rod device of sound combination in high temperature environment, the device mainly comprise transmitting system, test system, axle load system and heating furnace etc.. The firing system is composed of bullet, firing cavity, air release valve and air inlet valve, the test system is composed of incident and transmission pull rod, absorption rod and sticking/clamping type stretching clamp, the axial compression system is composed of baffle, connecting rod, actuator and hydraulic oil pump, the heating furnace is composed of heat-insulating frame and heating unitThe temperature control device comprises a device, a temperature sensor, a temperature control system and the like. By utilizing the device and the method of the utility model, the strain rate of materials such as rock, concrete and the like is 10 under the action of different compression static stress or temperature1～103s‑1The dynamic tensile mechanics and damage characteristic test fills the blank that the existing Hopkinson pull rod device cannot carry out dynamic and static combined loading or dynamic and static combined material dynamic direct tensile test experimental research on materials such as rock, concrete and the like under the condition of temperature and pressure coupling.
Description
Technical Field
The utility model belongs to material dynamic mechanical properties test field especially relates to an experimental testing arrangement that is arranged in measuring high temperature environment, material dynamic tensile properties such as rock, concrete under the loading of sound combination (static prestressing force compression load and dynamic tensile load) and destruction characteristic.
Background
The tensile strength of materials such as rock and concrete is far less than the compressive strength, and the materials such as rock and concrete may reach the tensile strength to generate tensile failure under the action of dynamic loads such as blasting and earthquake, so that the research on the tensile property under the action of the dynamic loads is more important than the research on the compressive property. Aiming at the dynamic mechanical property and damage test of materials, a split Hopkinson bar device is one of the most commonly used dynamic load loading devices, wherein a split Hopkinson pull bar is usually used for measuring the dynamic response of the materials under the action of dynamic tensile load. The existing Hopkinson pull rod system can realize the loading of dynamic tensile load, and does not relate to the condition of combined loading of dynamic impact load and static prestress compression load in a high-temperature environment. In actual deep geotechnical engineering, materials such as rock and concrete are often in a dynamic and static combined loading state (the static ground stress compression loading effect and the simultaneous effect of dynamic disturbance loads such as blasting and earthquake) and are not single dynamic tensile loading, and the ambient temperature can also gradually rise along with the increase of the burial depth. Therefore, the design of the split Hopkinson pull rod capable of being used for dynamic and static combined loading in a high-temperature environment is particularly critical for researching the dynamic tensile mechanical property and the destructive behavior of the material in actual deep geotechnical engineering.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide a loaded hopkinson pull rod device of sound combination in the high temperature environment, the utility model discloses an improve hopkinson pull rod system, realize the dynamic tensile loading of sample under warm-pressing coupling (static prestressing force and real-time temperature control loading) state, can be used to test and research high ground stress among the deep engineering, the dynamic tensile mechanical properties and the destruction law characteristic of materials such as rock, concrete under the high temperature environment.
The utility model aims at realizing through the following technical scheme:
a Hopkinson pull rod device loaded by a dynamic and static combination in a high-temperature environment is arranged on a test platform and comprises a launching system, a test system, a shaft pressure system and a heating furnace, wherein the launching system comprises bullets, a launching cavity, a release valve and an air inlet valve, and is placed on the test platform through a launching cavity support; the test system comprises an absorption rod, an incident pull rod, a stretching clamp and a transmission pull rod which are sequentially arranged, wherein the stretching clamp is used for fixing a sample, and an incident pull rod flange and a transmission pull rod flange are arranged at the front end of the incident pull rod and the tail end of the transmission pull rod so as to prevent the occurrence of a secondary loading condition; the absorption rod is placed on the test platform through the absorption rod support, and an incident pull rod end energy absorber and a transmission pull rod end energy absorber are respectively placed at the front end of the absorption rod and the tail end of the transmission pull rod and are used for absorbing redundant energy generated in a test and preventing reflected compression stress waves from being generated;
the axial compression system consists of an incident pull rod end baffle, a transmission pull rod end baffle, a connecting rod bracket, an actuator and a hydraulic oil pump, wherein the hydraulic oil pump applies axial compression to the test system through the actuator; the connecting rod is connected with the incident pull rod end baffle and the transmission pull rod end baffle at two ends through a connecting rod bracket fixed on the test platform so as to ensure the normal operation of the shaft pressing system;
the stretching clamp is arranged in the heating furnace, a connecting hole for the incident pull rod and the transmission pull rod to penetrate through is formed in the wall of the heating furnace, the heating furnace comprises a heat insulation frame, a heater, a temperature sensor, a temperature control system and the like, the temperature control system is used for setting the experiment temperature required by the heating furnace, and the heater is used for heating the inside of the heating furnace; the temperature sensor is used for monitoring the temperature in the heating furnace and feeding temperature information back to the temperature control system, and the heat insulation frame is used for isolating the influence of the external environment.
Further, the stretching clamp comprises two structural types, namely a bonding type stretching clamp and a clamping type stretching clamp.
Furthermore, two ends of the stretching clamp are fixedly connected with the incident pull rod and the transmission pull rod through threads.
Furthermore, the bonding type tensile clamp is used for a normal temperature test by installing a sample through resin adhesive with the tensile strength of 20-30 MPa.
Furthermore, the clamping type stretching clamp is suitable for dynamic and static combined loading in a high-temperature environment.
Compared with the prior art, the utility model discloses a beneficial effect that technical scheme brought is:
1. through setting up the axle load system, make the utility model discloses the device can exert static compression prestressing force load for dynamic tensile test sample, and simulation underground rock mass dead weight compression stress load makes rock material dynamic tensile strength and destruction characteristic research test be close the true occurrence environmental condition of deep rock mass more, and then makes the test result more reliable, has solved the technological problem that current device dynamic tensile test process can not exert static prestressing force compression load.
2. Through setting up the temperature loading system, can be for rock and concrete sample real-time application temperature load, simulation deep rock mass temperature load or the temperature load that concrete structure receives make rock material or concrete structure developments tensile strength and destruction law test be close to deep rock mass or the true environment that concrete structure is located more, and then ensure that the test result is more accurate reliable, remedies the defect that current device can only develop sample developments tensile test after high temperature treatment and cooling.
Drawings
FIG. 1 is a schematic structural view of a Hopkinson pull rod device in which a pull rod clamp is a clamping type tensile clamp;
FIG. 2 is a schematic structural view of a Hopkinson pull rod device in which the pull rod clamp is a clamping type tensile clamp;
FIG. 3a is a schematic diagram of a bonding type stretch clip;
FIG. 3b is a schematic illustration of the three-dimensional structure of the bonded tensile fixture after installation with a test specimen;
FIG. 4a is a schematic diagram of a two-dimensional structure of a clamping type stretch clip;
FIG. 4b is a schematic three-dimensional structure of a clamping type drawing jig;
FIG. 4c is a schematic illustration of the three-dimensional structure of the clamping-type tensile fixture after installation with a test specimen;
fig. 5 is a schematic view of a clamping type stretch clamp and heating system.
Reference numerals: 1-incident drawbar end energy absorber, 2-absorbing bar support, 3-absorbing bar, 4-incident drawbar end baffle, 5-incident drawbar flange, 6-bullet, 7-launching cavity support, 8-connecting bar, 9-launching cavity, 10-air release valve, 11-air inlet valve, 12-incident drawbar, 13-bonding type tensile fixture, 14-sample, 15-connecting bar support, 16-transmission drawbar, 17-transmission drawbar end energy absorber, 18-transmission drawbar flange, 19-actuator, 20-transmission drawbar end baffle, 21-hydraulic oil pump, 22-heating furnace, 23-clamping type tensile fixture, 24-screw thread, 25-heat insulation frame, 26-heater and 27-temperature sensor.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a be arranged in measuring material high temperature environment such as rock, concrete sound combination loaded hopkinson pull rod device and method, the device can realize on the basis of pre-loading static load (axial pressure), measures the dynamic response of materials such as rock, concrete under the dynamic tensile loading effect in high temperature environment for material stress state such as rock, concrete more accords with the true stress state of actual deep ground material.
As shown in fig. 1 and 2, the hopkinson pull rod device mainly comprises a launching system, a testing system, an axial compression system, a heating furnace and the like. The launching system consists of a bullet 6, a launching cavity 9, a deflation valve 10 and an air inlet valve 11, and the whole launching system is placed on the test platform through a launching cavity support 7. The test system is composed of an incident pull rod 12, a transmission pull rod 16, an absorption rod 3, a sample 14, an adhesive type stretching clamp 13, a clamping type stretching clamp 23 and threads 24, wherein an incident pull rod flange 5 and a transmission pull rod flange 18 are arranged at the front end of the incident pull rod 12 and the tail end of the transmission pull rod 16, so that the secondary loading condition is prevented; the absorption rod 3 is placed on the test platform through the absorption rod bracket 2, and the front end of the absorption rod 3 and the tail end of the transmission pull rod 16 are provided with an incident pull rod end energy absorber 1 and a transmission pull rod end energy absorber 17 which are used for absorbing redundant energy generated in a test and preventing generation and influence of reflected compression stress waves; the test specimen 14 may be secured to a stick type tensile fixture 13 or a clamp type tensile fixture 23 and attached to the test system by threads 24. The axial compression system consists of an incident pull rod end baffle 4, a transmission pull rod end baffle 20, a connecting rod 8, a connecting rod bracket 15, an actuator 19 and a hydraulic oil pump 21, wherein the hydraulic oil pump 21 applies axial compression to the test system through the actuator 19; the connecting rod 8 is fixed on the test platform through the connecting rod bracket 15 and is used for connecting the incident pull rod end baffle 4 and the transmission pull rod end baffle 20 at two ends, so that the normal operation of the shaft pressing system is ensured. The heating furnace 22 is composed of a heat insulation frame 25, a heater 26, a temperature sensor 27, a temperature control system and the like (see fig. 5), the experiment temperature required by the heating furnace 22 is set through the temperature control system, and the heater 26 heats the inside of the heating furnace 22; the temperature sensor 27 is used for monitoring the temperature in the heating furnace 22 and feeding back the related temperature information to the temperature control system, and the heat insulation frame 25 is used for isolating the influence of the external environment.
The draw bar arrangement provides two forms of tension clamp: the bonding type clamp is in a common tensile clamp form, the sample is simple to prepare and install, but the high-strength resin adhesive (the tensile strength is 20-30MPa) used for installing the sample cannot resist high temperature, so that the bonding type clamp cannot be used for a high-temperature test, and the test sample corresponding to the bonding type clamp is cylindrical; the clamping type clamp is suitable for dynamic and static combined loading in a high-temperature environment, but the test sample is in a dog-bone shape, and the sample processing requirement is relatively high. In the specific implementation process, a proper form of stretching clamp is selected according to the requirements of practical experiments. The working principle of the device is a one-dimensional stress wave propagation theory, a dynamic stretching process, and the dynamic tensile strength, tensile strain and tensile test strain rate of a test sample are calculated according to the following formulas:
P1＝AE(i+r) (1)
P2＝AE(t) (2)
in the formula: A. a. the0The cross-sectional areas of the elastic rod (incident rod and transmission rod) and the sample, respectively, E the elastic modulus of the elastic rod (incident rod and transmission rod), C the propagation velocity of the wave in the elastic rod (incident rod and transmission rod), L the length of the incident rod,i、rrespectively an incident tensile stress wave and a reflected compressive stress wave signal which are monitored by a strain gauge adhered on the incident pull rod,ttransmitted tensile stress wave signal, P, monitored by strain gauges attached to the transmission rods1、P2As loads at both end faces of the sample, σ (t), (t) and
the dynamic tensile strength, strain and strain rate of the sample, respectively, as a function of time.
Example 1: the testing method of the Hopkinson pull rod device loaded by the combination of dynamic and static loads in the high-temperature environment comprises the following steps that:
the method comprises the following steps: a bonding type stretching jig as shown in FIG. 3a was prepared, the jig having an outer diameter of 50mm, an inner diameter of 35mm and a groove depth of 3 mm. Preparing a granite cylindrical sample with the diameter of 34.5mm and the length of 50mm, wherein the maximum error of the diameter of the sample is not more than 0.1mm, the parallelism of two sections is not more than 0.02mm, the end face is vertical to the axis of the sample, and the maximum deviation is not more than 0.25 degrees;
step two: the polished granite cylindrical sample 14 is bonded between bonding type tensile clamps 13 by high-strength resin adhesive (tensile strength is 20-30MPa), see fig. 3b, after the adhesive is completely bonded for 24 hours, the bonding type tensile clamps 13 are connected between the incident pull rod 12 and the transmission pull rod 16 through threads 24. The 6061 aluminum incident pull rod 12 and the transmission pull rod 16 with the pull rod diameter of 35mm and the lengths of 3000mm and 2500mm are respectively fixed on a test platform through a support;
step three: according to the wavelength of the required stress wave, symmetrically sticking a group of strain gauges (ZF1000-1.5AA-A (11) -X) at the central surface positions of the incident pull rod 12 and the transmission pull rod 16 respectively, wherein the strain gauges are connected with a super dynamic strain gauge and an oscilloscope through a shielding lead and a bridge box and are used for monitoring and storing the incident tensile stress wave, the reflected compressive stress wave signal and the transmission tensile stress wave signal on the incident pull rod 12 in real time;
step four: opening a hydraulic oil pump 21 of the axial pressure system, adjusting the axial pressure device to a required preset static load value (the value can be assigned according to an actually measured ground stress value and also can be set to be a certain percentage value of the static uniaxial compressive strength of the sample, such as 3MPa), and applying a preset static load (3MPa) to the test system through an actuator 19;
step five: symmetrically pasting a waveform shaper (a red copper sheet with the diameter of 5mm and the thickness of 1 mm) on an incident pull rod flange 5, then releasing compressed gas through an air inlet valve 11 to drive a 6061 aluminum bullet 6 with the inner diameter of 35.5mm, the outer diameter of 49.9mm and the length of 100mm to impact the incident pull rod flange 5, generating required tensile dynamic load to act on a sample 14, absorbing the redundant load by an absorption rod with the diameter of 35mm and the length of 500mm, and simultaneously preventing the generation of reflected compression stress waves; after the sample 14 is destroyed, opening the air release valve 10 to release the residual air pressure, collecting the incident tensile stress wave, the reflected compressive stress wave and the transmitted tensile stress wave signal through the strain gauge (ZF1000-1.5AA-A (11) -X) stuck on the incident pull rod 12 and the transmission pull rod 16, and simultaneously taking out the destroyed sample for the next analysis;
step six: based on the stress wave signal monitored during the test, the dynamic tensile strength and tensile strain of the specimen 14 at a predetermined static load value (3MPa) and the tensile test strain rate can be calculated according to the equations (3) - (5).
In the formula: A. a. the0Cross-sectional areas of the elastic bar (incident pull bar and transmission pull bar) and the sample (elastic bar cross-sectional area 963 mm)2Cross-sectional area of the test piece 934.8mm2) E is the elastic modulus (71GPa) of the elastic rod (the incident pull rod and the transmission pull rod), C is the propagation speed of the wave in the elastic rod (the incident pull rod and the transmission pull rod), L is the length of the incident pull rod,i、rincident tensile stress wave and reflected compressive stress wave signals monitored by a strain gauge adhered to the incident pull rod,ttransmitted tensile stress wave signal, P, monitored by strain gauges attached to the transmission rods1、P2As loads at both end faces of the sample, σ (t), (t) and
the dynamic tensile strength, strain and strain rate of the sample, respectively, as a function of time.
Example 2: the testing method of the Hopkinson pull rod device loaded by the combination of dynamic and static in the high-temperature environment comprises the following steps that:
the method comprises the following steps: a clamping type stretching jig as shown in FIGS. 4a and 4b was prepared, the thickness of the jig was 30mm, the outer width was 108mm, the inner width was 18mm, the length of the rectangular portion of the groove was 10mm, and the width of the rectangular portion of the groove was 58 mm. Preparing a dog-bone granite sample with the thickness of 30mm, the outer width of 57.5mm and the inner width of 17.5mm, wherein the non-parallelism of two sections of the sample is not more than 0.02mm, the end surface is vertical to the axis of the sample, and the maximum deviation is not more than 0.25 degrees;
step two: a clamping type tensile clamp 23 is connected between the incident pull rod 12 and the transmission pull rod 16 through threads 24, see fig. 4c, the distance between the clamps is adjusted to a reasonable position, and then the ground tensile sample 14 (a dog-bone-shaped granite sample) is slowly pushed into the clamps (perpendicular to the loading direction). The 6061 aluminum incident pull rod 12 and the transmission pull rod 16 with the rod diameter of 35mm and the lengths of 3000mm and 2500mm are respectively fixed on a test platform through a support;
step three: according to the wavelength of the required stress wave, a group of strain gauges (ZF1000-1.5AA-A (11) -X) are respectively adhered to the appropriate positions of the incident pull rod 12 and the transmission pull rod 16 and are connected with a super dynamic strain gauge and an oscilloscope through a shielding lead and a bridge box, and the strain gauges and the oscilloscope are used for monitoring and storing the incident tensile stress wave and the reflected compressive stress wave signals on the incident pull rod 12 and the transmission tensile stress wave signals on the transmission pull rod 16 in real time.
Step four: opening a hydraulic oil pump 21 of the axial pressure system, adjusting the axial pressure device to a required preset static load value (the value can be assigned according to an actually measured ground stress value and also can be set to be a certain percentage value of the static uniaxial compressive strength of the sample, such as 2MPa), and applying a preset static load (2MPa) to the test system through an actuator 19;
step five: the heating furnace 22 is opened, the temperature is adjusted to the required temperature through the temperature control system (the temperature adjustable range of the heating system of the utility model is room temperature to 600 ℃, the melting point of 6061 aluminum is 660 ℃, 400 ℃ is selected as an example), and after the temperature in the heating furnace 22 is stable, the next step of experiment can be carried out;
step six: symmetrically pasting a waveform shaper (a red copper sheet with the diameter of 5mm and the thickness of 1 mm) on an incident pull rod flange 5, then putting compressed gas through an air inlet valve 11 to drive a 6061 aluminum bullet 6 with the inner diameter of 35.5mm, the outer diameter of 49.9mm and the length of 100mm to impact the incident pull rod flange 5, generating required tensile dynamic load to act on a sample 14, and absorbing the redundant load by an absorption rod with the rod diameter of 35mm and the length of 500mm, and simultaneously preventing the generation of reflected compression stress waves; after the sample 14 is destroyed, opening the air release valve 10 to release the residual air pressure, collecting the incident tensile stress wave, the reflected compressive stress wave and the transmitted tensile stress wave signal through strain gauges (ZF1000-1.5AA-A (11) -X) stuck on the incident pull rod 12 and the transmission pull rod 16, simultaneously reducing the temperature in the heating furnace 22 to the room temperature and taking out the destroyed sample for the next analysis;
step seven: based on the stress wave signal monitored in the test process, the dynamic tensile strength and tensile strain of the sample 14 at a predetermined static load value (2MPa), a predetermined heating temperature (400 ℃) and a tensile test strain rate can be calculated according to the formulas (3) to (5).
In the formula: A. a. the0Cross-sectional areas of the elastic bar (incident pull bar and transmission pull bar) and the sample (elastic bar cross-sectional area 963 mm)2Cross-sectional area of the specimen 525mm2) E is the elastic modulus (71GPa) of the elastic rod (the incident pull rod and the transmission pull rod), C is the propagation speed of the wave in the elastic rod (the incident pull rod and the transmission pull rod), L is the length of the incident pull rod,i、rincident tensile stress wave and reflected compressive stress wave signals monitored by a strain gauge adhered to the incident pull rod,ttransmitted tensile stress wave signal, P, monitored by strain gauges attached to the transmission rods1、P2As loads at both end faces of the sample, σ (t), (t) and
the dynamic tensile strength, strain and strain rate of the sample, respectively, as a function of time.
The present invention is not limited to the above-described embodiments. The above description of the embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above embodiments are merely illustrative and not restrictive. Without departing from the spirit of the invention and the scope of the appended claims, the person skilled in the art can make many changes in form and detail within the teaching of the invention.
Claims (5)
1. A Hopkinson pull rod device loaded by a dynamic and static combination in a high-temperature environment is arranged on a test platform and is characterized by comprising a launching system, a test system, a shaft pressure system and a heating furnace (22), wherein the launching system comprises bullets (6), a launching cavity (9), an air release valve (10) and an air inlet valve (11), and is arranged on the test platform through a launching cavity support (7); the test system is composed of an absorption rod (3), an incident pull rod (12), a stretching clamp and a transmission pull rod (16) which are sequentially arranged, wherein the stretching clamp is used for fixing a sample (14), and an incident pull rod flange (5) and a transmission pull rod flange (18) are arranged at the front end of the incident pull rod (12) and the tail end of the transmission pull rod (16) so as to prevent the occurrence of a secondary loading condition; the absorption rod (3) is placed on the test platform through the absorption rod support (2), and an incident pull rod end energy absorber (1) and a transmission pull rod end energy absorber (17) are respectively placed at the front end of the absorption rod (3) and the tail end of the transmission pull rod (16) and are used for absorbing redundant energy generated in a test and preventing reflected compression stress waves;
the axial compression system consists of an incident pull rod end baffle (4), a transmission pull rod end baffle (20), a connecting rod (8), a connecting rod bracket (15), an actuator (19) and a hydraulic oil pump (21), wherein the hydraulic oil pump (21) applies axial compression to the test system through the actuator (19); the connecting rod (8) is connected with an incident pull rod end baffle (4) and a transmission pull rod end baffle (20) which are positioned at two ends through a connecting rod bracket (15) fixed on the test platform so as to ensure the normal operation of the shaft pressing system;
the stretching clamp is arranged in the heating furnace (22), a connecting hole for the incident pull rod (12) and the transmission pull rod (16) to penetrate through is formed in the wall of the heating furnace (22), the heating furnace (22) is composed of a heat insulation frame (25), a heater (26), a temperature sensor (27) and a temperature control system, the experiment temperature required by the heating furnace (22) is set through the temperature control system, and the heater (26) heats the inside of the heating furnace (22); the temperature sensor (27) is used for monitoring the temperature in the heating furnace (22) and feeding temperature information back to the temperature control system, and the heat insulation frame (25) is used for isolating the influence of the external environment.
2. The Hopkinson tension bar device for combined dynamic and static loading in a high-temperature environment according to claim 1, wherein the tensile clamp comprises two structural types, namely a bonding type tensile clamp (13) and a clamping type tensile clamp (23).
3. The Hopkinson tension bar device for dynamic and static combined loading in a high-temperature environment according to claim 1 or 2, wherein two ends of the tension clamp are fixedly connected with the incident tension bar (12) and the transmission tension bar (16) through threads (24).
4. The Hopkinson tension bar device with combined dynamic and static loading in a high-temperature environment according to claim 2, wherein the bonding type tensile clamp (13) is used for a normal-temperature test by mounting a sample through a resin adhesive with a tensile strength of 20-30 MPa.
5. The Hopkinson tension bar device for dynamic and static combined loading in a high temperature environment according to claim 2, wherein the clamping type stretching clamp (23) is suitable for dynamic and static combined loading in a high temperature environment.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296898A (en) * | 2019-06-28 | 2019-10-01 | 天津大学 | The Hopkinson pull rod device and method of coupled static-dynamic loadingi in a kind of hot environment |
| CN114152505A (en) * | 2021-11-24 | 2022-03-08 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Stress reversal dynamic tensile loading test system |
| CN114544357A (en) * | 2022-01-26 | 2022-05-27 | 深圳大学 | Testing device and testing method for testing dynamic and static combined tensile and shearing strength of solid material |
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2019
- 2019-06-28 CN CN201920993288.5U patent/CN211122349U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296898A (en) * | 2019-06-28 | 2019-10-01 | 天津大学 | The Hopkinson pull rod device and method of coupled static-dynamic loadingi in a kind of hot environment |
| CN114152505A (en) * | 2021-11-24 | 2022-03-08 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Stress reversal dynamic tensile loading test system |
| CN114544357A (en) * | 2022-01-26 | 2022-05-27 | 深圳大学 | Testing device and testing method for testing dynamic and static combined tensile and shearing strength of solid material |
| CN114544357B (en) * | 2022-01-26 | 2024-01-02 | 深圳大学 | Solid material dynamic and static combination tensile shear strength test device and test method |
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