CN114965018A - Indentation experimental device and experimental method thereof - Google Patents
Indentation experimental device and experimental method thereof Download PDFInfo
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- CN114965018A CN114965018A CN202210674977.6A CN202210674977A CN114965018A CN 114965018 A CN114965018 A CN 114965018A CN 202210674977 A CN202210674977 A CN 202210674977A CN 114965018 A CN114965018 A CN 114965018A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
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Abstract
The application discloses indentation experimental apparatus and experimental method thereof, including the platform, support in the experimental box of platform, connect in the indentation subassembly at the top of experimental box with support in the platform just is used for placing the sample base of sample, the experimental box include the box, connect in the chamber door of box with connect in the electric cabinet of the outer wall of box, the chamber wall that holds the cavity of box is connected with the baffle, the baffle will it splits into experiment cavity and accuse temperature cavity to hold the cavity. The application provides an indentation experimental apparatus can be through this indentation experimental apparatus to the mechanical properties test of material under high temperature and low temperature environment.
Description
Technical Field
The application relates to the field of indentation experimental instruments, in particular to an indentation experimental device and an experimental method thereof.
Background
The indentation experiment is used for testing and characterizing the mechanical properties of the material, and is used for evaluating the hardness, strength, fracture performance and the like of the material. Indentation test method was originally used to test the hardness of a material, and in 1951, Tabor modified the test method, i.e., the indentation test method for obtaining other mechanical properties of a material through an indentation process. In 1992, Oliver and Pharr performed inverse analysis on the load-depth (P-h) curve obtained from the instrumented indentation experiment to obtain the classical method for measuring the elastic modulus and hardness of the material, i.e., Oliver-Pharr method. With the further development of this method, a single-point multiple loading and unloading continuous ball indentation method has been proposed and widely used. Ahn and the like obtain a true stress-true strain curve by analyzing and fitting indentation parameters obtained by a continuous ball indentation experiment, and can further obtain the tensile property of the material according to the experiment curve.
The mechanical property of the material can be changed under the high-temperature and low-temperature environments generally, and in the prior art, an indentation experimental device is difficult to test the mechanical property of the material under the high-temperature and low-temperature environments generally.
Disclosure of Invention
Therefore, the application provides an indentation experimental device and an experimental method thereof to solve the problems in the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
an indentation experimental device comprises a platform, an experimental box supported on the platform, an indentation component connected to the top of the experimental box and a sample base supported on the platform and used for placing a sample, wherein the experimental box comprises a box body, a box door connected to the box body and an electric cabinet connected to the outer wall of the box body, the cavity wall of a containing cavity of the box body is connected with a partition board, the containing cavity is divided into an experimental cavity and a temperature control cavity by the partition board, the top of the box body is provided with a first through hole communicated with the experimental cavity, the indentation component comprises a servo motor connected to the top of the experimental box and a pressure head connected to the output end of the servo motor and extending into the experimental cavity through the first through hole, the bottom of the experimental box is provided with a second through hole, and part of the sample base extends into the experimental cavity through the second through hole, the wall of the temperature control cavity is connected with a heating resistor and a liquid nitrogen spray nozzle, the partition plate is provided with a plurality of third through holes, an electric control part for controlling the heating resistor to be powered on or off/the liquid nitrogen spray nozzle to be opened or closed according to a feedback signal is arranged in the electric control chamber, and the wall of the accommodating cavity is connected with a temperature sensor for providing the feedback signal; the sample base including support in the supporting seat of platform, sliding connection in just be used for placing at the top of supporting seat the laboratory bench of sample, connect in the supporting seat just is used for the drive the gliding driving piece of laboratory bench along first direction or second direction, first direction with second direction mutually perpendicular, just first direction with the second direction is located same horizontal plane, the part of laboratory bench passes through the second through-hole stretches into the experiment cavity.
Preferably, the indentation experimental device further comprises a motor connected to the inner wall of the electric cabinet and a fan connected to an output shaft of the motor, the fan is located in the temperature control cavity, the liquid nitrogen spray head is controlled to be on and off through an electromagnetic valve, and the electromagnetic valve is electrically connected with the electric control part.
Preferably, the fan is a cross-flow fan.
Preferably, the number of the temperature sensors is two, one of the temperature sensors is connected to the wall of the experiment cavity close to the second through hole, and the other of the temperature sensors is connected to the wall of the experiment cavity close to the third through hole.
Preferably, the hole wall of the first through hole is connected with a first sealing element for sealing a gap between the pressure head and the hole wall of the first through hole, and the hole wall of the second through hole is connected with a second sealing element for sealing a gap between the sample base and the hole wall of the second through hole.
Preferably, the first sealing element and the second sealing element are both aluminum silicate cotton.
Preferably, the box door is provided with an observation window for observing the experiment cavity, and the cavity wall of the experiment cavity is connected with an experiment lamp for irradiating the sample.
The application also provides an experimental method of indentation experiment, which uses the indentation experimental device as described above to perform experiment, and the experimental method comprises the following steps:
mounting the indentation assembly on the top of the experimental box, enabling the pressure head to extend into the experimental cavity, placing the sample on the experimental table, enabling the sample base to be placed on the platform, enabling the experimental table to partially extend into the experimental cavity, sealing a gap between the pressure head and the hole wall of the first through hole, and sealing a gap between the sample base and the hole wall of the second through hole;
closing the box door and switching on the power supply of the experimental box;
setting a predetermined temperature;
the temperature sensor detects the experiment temperature in the experiment cavity in real time, and provides a feedback signal of the detected experiment temperature to the electric control part, and the electric control part controls the heating resistor to be powered on or powered off through the feedback signal, or controls the liquid nitrogen spray head to be opened or closed through the electric control part, so that the experiment temperature in the experiment cavity reaches the preset temperature;
after the experiment temperature reaches the preset temperature, waiting for 30 minutes;
controlling the servo motor to drive the end part of the pressure head to abut against the sample to perform an indentation experiment;
and turning off the power supply of the experimental box.
This application has following advantage:
an experimenter places a sample to be tested on an experiment table, installs a sample base on the bottom of an experiment box, and makes part of the experiment table extend into an experiment cavity through a second through hole, so that the sample is in the experiment cavity, installs an indentation component, so that a pressure head extends into the experiment cavity, controls a heating resistor or a liquid nitrogen spray nozzle through an electric control part after a box door is closed, a temperature sensor is used for monitoring the temperature in the experiment cavity in real time, and feeds back a feedback signal obtained by monitoring to an electric control part, if the feedback signal does not reach the preset temperature, a motor part continues to control the heating resistor or the liquid nitrogen spray nozzle until the temperature in the experiment cavity reaches the preset temperature, and can accurately simulate the temperature environment of the sample to be tested in the experiment box, so that when the pressure head of the indentation component carries out indentation experiment on the sample, the mechanical properties of the sample, such as hardness, strength, fracture performance and the like under high and low temperature environments can be obtained, the driving piece of the sample base can drive the experiment table to slide along the first direction or the second direction, so that the position of the sample to be tested can be adjusted to obtain the experiment results of different parts of the sample, or the experiment results of the sample at different temperatures, and the problem that in the prior art, an indentation experiment device is difficult to test the mechanical properties of materials in high-temperature and low-temperature environments is solved.
Drawings
To more intuitively illustrate the prior art and the present application, several exemplary drawings are given below. It should be understood that the specific shapes, configurations and illustrations in the drawings are not to be construed as limiting, in general, the practice of the present application; for example, it is within the ability of those skilled in the art to make routine adjustments or further optimizations based on the technical concepts disclosed in the present application and the exemplary drawings, for the increase/decrease/attribution of certain units (components), specific shapes, positional relationships, connection manners, dimensional ratios, and the like.
Fig. 1 is a schematic partial structural view of an indentation testing apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic overall structural diagram of an indentation experimental apparatus according to an embodiment of the present application;
fig. 3 is a schematic view of a sample base of an indentation testing apparatus according to an embodiment of the present disclosure.
Description of reference numerals:
1. an experimental box; 11. a box body; 111. a box door; 1111. an observation window; 112. a partition plate; 1121. a third through hole; 113. an experimental cavity; 114. a temperature control cavity; 115. a first through hole; 116. a second through hole; 118. a heating resistor; 119. a liquid nitrogen spray head; 12. an electric cabinet; 121. a fan; 122. an electrical control; 2. an indentation assembly; 21. a servo motor; 22. a pressure head; 3. a sample base; 31. a laboratory bench; 32. a supporting seat; 33. a drive member; 331. a first base; 332. a first lead screw; 333. a second base; 334. a second lead screw; 34. a second layer; 4. a platform; 5. a sample; 6. a temperature sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application: the terms "inner" and "outer" refer to the inner and outer of the respective component profiles; the terms "first", "second", and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed that are inherent to such process, method, article, or apparatus or that are added based on further optimization concepts of the present invention.
Referring to fig. 1-3, this embodiment provides an indentation experimental apparatus, which includes a platform 4, a testing box 1 supported on the platform 4, an indentation module 2 connected to the top of the testing box 1, and a sample base 3 supported on the platform 4 and used for placing a sample 5, the testing box 1 includes a box body 11, a box door 111 connected to the box body 11, and an electric cabinet 12 connected to the outer wall of the box body 11, a partition 112 is connected to the cavity wall of the accommodating cavity of the box body 11, the accommodating cavity is divided into an experimental cavity 113 and a temperature-controlled cavity 114 by the partition 112, a first through hole 115 communicating with the experimental cavity 113 is formed at the top of the box body 11, the indentation module 2 includes a servo motor 21 connected to the top of the testing box 1 and a pressing head 22 connected to the output end of the servo motor 21 and extending into the experimental cavity 113 through the first through hole 115, a second through hole 116 is formed at the bottom of the testing box 1, a portion of the sample base 3 extends into the experimental cavity 113 through the second through hole 116, the cavity wall of the temperature control cavity 114 is connected with a heating resistor 118 and a liquid nitrogen spray head 119, the partition plate 112 is provided with a plurality of third through holes 1121, an electric control part 122 for controlling the heating resistor 118 to be powered on or powered off/the liquid nitrogen spray head 119 to be opened or closed according to a feedback signal is arranged in the electric control chamber, and the cavity wall of the accommodating cavity is connected with a temperature sensor 6 for providing the feedback signal; the sample base 3 comprises a supporting seat 32 supported on the platform 4, an experiment table 31 slidably connected to the top of the supporting seat 32 and used for placing a sample 5, a driving piece 33 connected to the supporting seat 32 and used for driving the experiment table 31 to slide along a first direction or a second direction, the first direction and the second direction are perpendicular to each other, the first direction and the second direction are located on the same horizontal plane, and the part of the experiment table 31 extends into the experiment cavity 113 through a second through hole 116.
An experimenter places a sample 5 to be tested on an experiment table 31, then installs a sample base 3 on the bottom of an experiment box 1, and makes part of the experiment table 31 extend into an experiment cavity 113 through a second through hole 116, so that the sample 5 is in the experiment cavity 113, then installs an indentation component 2, makes a pressure head 22 extend into the experiment cavity 113, after closing a box door 111, controls a heating resistor 118 or a liquid nitrogen spray head 119 through an electric control 122, a temperature sensor 6 is used for monitoring the temperature in the experiment cavity 113 in real time, and feeds back a feedback signal obtained by monitoring to the electric control 122, if the temperature does not reach a preset temperature, the electric motor continues to control the heating resistor 118 or the liquid nitrogen spray head 119 until the temperature in the experiment cavity 113 reaches the preset temperature, a temperature environment to be tested of the sample 5 can be accurately simulated in the experiment box 1, so that when the pressure head 22 of the indentation component 2 performs indentation experiments on the sample 5, can obtain mechanical properties such as hardness, intensity and fracture performance of sample 5 under high low temperature environment, the driving piece 33 of sample base 3 can drive laboratory bench 31 and slide along first direction or second direction, like this, can adjust the position that sample 5 was tested to obtain the experimental result at the different positions of sample 5, perhaps, the experimental result of sample 5 under the different temperatures, solved prior art, the indentation experimental apparatus is generally difficult to the mechanical properties test of material under high temperature and low temperature environment.
The electrical control 122 is composed of an artificial intelligence industrial regulator and other execution elements. The temperature sensor 6 transmits the feedback signal to the artificial intelligent industrial regulator to form PID control (open-close loop control) and control the experiment temperature.
Referring to fig. 3, the first direction and the second direction are perpendicular to each other to form an X-Y moving direction, the sample base 3 may have three layers, the first layer is the supporting base 32, the second layer 34 is slidably connected to the first layer, the third layer is slidably connected to the second layer 34, the driving member 33 includes a first component connected between the first layer and the second layer 34, and a second component connected between the second layer 34 and the third layer, the first component includes a first base 331 and a first screw rod 332 fixedly connected to the first layer, one end of the first screw rod 332 is rotatably connected to the first base 331, the other end is rotatably connected to the second layer 34, the second component includes a second base 333 and a second screw rod 334 fixedly connected to the second layer 34, one end of the second screw rod 334 is rotatably connected to the second base 333, and the other end is rotatably connected to the third layer.
The extending direction of the first lead screw 332 is the same as the first direction, and the extending direction of the second lead screw 334 is the same as the second direction, that is, the first lead screw 332 and the second lead screw 334 are rotated, so that the movement of the third layer in the first direction and the second direction can be realized, wherein the third layer is the experiment table 31.
The indentation experimental apparatus further comprises a conversion interface, wherein the conversion interface is used for connecting the indentation module 2 to the top of the experimental box 1, clamps the servo motor 21 between the conversion interface and the outer wall of the experimental box 1, and connects the conversion interface to the outer wall of the experimental box 1 through a plurality of bolts.
The experimental box 1 comprises an inner side and an outer side, the inner layer of the experimental box 1 is made of a stainless steel plate, and the outer layer of the experimental box 1 is made of a cold-rolled steel plate.
Four truckles are installed to the bottom of experimental box 1, and like this, the experimental box of being convenient for removes, and four screw adjustment seats can also be installed to the bottom of experimental box 1, and the screw adjustment seat is used for adjusting experimental box 1's height.
It should be further explained here that the outer wall of the experimental box 1 is connected with a self-pressurizing liquid nitrogen bottle through a pipeline, the pipeline is controlled to be on and off through an electromagnetic valve, and the other end of the pipeline is connected with a liquid nitrogen spray head 119, so that a low-temperature test environment is obtained.
The first through hole 115 and the second through hole 116 are circular holes, and a central axis of the first through hole 115 coincides with a central axis of the second through hole 116.
The platform 4 is a marble platform 4, and the plane of the platform 4 is parallel to the horizontal plane.
The experimental box 1 is provided with an operation panel, and the experimenter controls heating, refrigerating and the like through the operation panel.
Referring to fig. 1-2, the indentation experimental apparatus further includes a motor connected to the inner wall of the electric cabinet 12 and a fan 121 connected to an output shaft of the motor, the fan 121 is located in the temperature control cavity 114, the liquid nitrogen nozzle 119 is controlled to be on and off by an electromagnetic valve, and the electromagnetic valve is electrically connected to the electric control part 122. The fan 121 can accelerate the air circulation flow between the experiment cavity 113 and the temperature control cavity 114, so that the high temperature generated by the heating resistor 118 or the low temperature generated by the liquid nitrogen spray head 119 can enter the experiment cavity 113 more quickly, the liquid nitrogen spray head 119 is controlled by the electromagnetic valve, and the precision of controlling the on-off of the liquid nitrogen spray head 119 is higher.
The fan 121 is a cross flow fan 121. The wind speed distribution of the cross flow fan 121 is uniform, which facilitates uniform temperature transfer.
Referring to fig. 1-2, there are two temperature sensors 6, one temperature sensor 6 is connected to the wall of the experimental cavity 113 near the second through hole 116, and the other temperature sensor 6 is connected to the wall of the experimental cavity 113 near the third through hole 1121. The temperature sensor 6 close to the second through hole 116 is also close to the sample 5 to be tested, the temperature sensor 6 can more accurately monitor the temperature environment around the sample 5, the temperature sensor 6 close to the third through hole 1121 is closer to the heating resistor 118 and the liquid nitrogen spray head 119, and when the temperatures monitored by the two temperature sensors 6 are consistent, it is shown that the temperature in the experiment cavity 113 reaches the preset temperature, and the temperature in the experiment cavity 113 is stable.
The hole wall of the first through hole 115 is connected with a first sealing element for sealing a gap between the pressure head 22 and the hole wall of the first through hole 115, and the hole wall of the second through hole 116 is connected with a second sealing element for sealing a gap between the sample base 3 and the hole wall of the second through hole 116. The first sealing element and the second sealing element can effectively avoid the air in the experiment cavity 113 from convecting with the air outside the experiment box 1, and then the temperature in the experiment cavity 113 is leaked.
The first sealing element and the second sealing element are both aluminum silicate cotton. The aluminum silicate cotton has excellent thermal stability and chemical stability, and can effectively insulate heat, wherein the aluminum silicate cotton has certain elasticity and plasticity, can allow the pressure head 22 and the sample base 3 to move to a certain degree, and keeps the sealing property.
Referring to fig. 1 to 2, the chamber door 111 is provided with an observation window 1111 for observing the experimental cavity 113, and an experimental lamp for irradiating the sample 5 is connected to a chamber wall of the experimental cavity 113. The experimenter can observe the condition of the sample 5 in the experiment cavity 113 through the observation window 1111, and the experiment lamp is used for providing illumination, so that the experimenter can conveniently observe the condition.
The present embodiment further provides an experimental method of an indentation experiment, which uses the indentation experimental apparatus as described above to perform an experiment, and the experimental method includes:
installing the indentation assembly 2 on the top of the experimental box 1, enabling the pressure head 22 to extend into the experimental cavity 113, placing the sample 5 on the experimental table 31, placing the sample base 3 on the platform 4, enabling part of the experimental table 31 to extend into the experimental cavity 113, sealing a gap between the pressure head 22 and the hole wall of the first through hole 115 by using aluminum silicate cotton, and sealing a gap between the sample base 3 and the hole wall of the second through hole 116 by using the aluminum silicate cotton;
closing the box door 111 and switching on the power supply of the experiment box 1;
setting a predetermined temperature (which is set by the experimenter through a control panel);
the temperature sensor 6 monitors the experiment temperature in the experiment cavity 113 in real time, and provides a feedback signal of the monitored experiment temperature to the electric control 122, and the electric control 122 controls the heating resistor 118 to be powered on or powered off through the feedback signal, or controls the liquid nitrogen spray nozzle 119 to be opened or closed through the electric control 122, so that the experiment temperature in the experiment cavity 113 reaches the preset temperature. When refrigeration is needed, the experiment box 1 is connected with a pipeline of a liquid nitrogen refrigeration device (before the experiment is carried out each time, whether the pipeline of the refrigeration device is reliably connected or not is checked, if the pipeline is not fastened, liquid nitrogen leakage can be caused, and safety accidents can occur); closing an emptying valve on a self-pressurization liquid nitrogen bottle; opening a pressure increasing valve; observing the pressure gauge, and opening the liquid inlet and outlet valve when the pressure rises to between 0.01MPa (0.1kg/cm2) and 0.05MPa (0.5kg/cm 2);
after the experiment temperature reaches the preset temperature, waiting for 30 minutes (waiting for 30 minutes is convenient for the temperature to be conducted into the sample 5, so that the internal and external temperatures of the sample 5 are consistent);
controlling the servo motor 21, driving the end of the ram 22 to abut against the sample 5, and performing indentation experiments (indentation experiments are a technical way commonly used by persons in the field, and are not described herein again);
the power to the experimental box 1 was turned off.
All the technical features of the above embodiments can be arbitrarily combined (as long as there is no contradiction between the combinations of the technical features), and for brevity of description, all the possible combinations of the technical features in the above embodiments are not described; these examples, which are not explicitly described, should be considered to be within the scope of the present description.
The present application has been described in considerable detail with reference to certain embodiments and examples thereof. It should be understood that several conventional adaptations or further innovations of these specific embodiments may also be made based on the technical idea of the present application; however, such conventional modifications and further innovations may also fall within the scope of the claims of the present application as long as they do not depart from the technical idea of the present application.
Claims (8)
1. An indentation experimental device is characterized by comprising a platform, an experimental box supported on the platform, an indentation component connected to the top of the experimental box and a sample base supported on the platform and used for placing a sample, wherein the experimental box comprises a box body, a box door connected to the box body and an electric cabinet connected to the outer wall of the box body, a partition plate is connected to the cavity wall of a containing cavity of the box body, the partition plate divides the containing cavity into an experimental cavity and a temperature control cavity, a first through hole communicated with the experimental cavity is formed in the top of the box body, the indentation component comprises a servo motor connected to the top of the experimental box and a pressure head connected to the output end of the servo motor and extending into the experimental cavity through the first through hole, a second through hole is formed in the bottom of the experimental box, and part of the sample base extends into the experimental cavity through the second through hole, the wall of the temperature control cavity is connected with a heating resistor and a liquid nitrogen spray nozzle, the partition plate is provided with a plurality of third through holes, an electric control part used for controlling the heating resistor to be powered on or powered off or the liquid nitrogen spray nozzle to be switched on or switched off according to a feedback signal is arranged in the electric control chamber, and the wall of the accommodating cavity is connected with a temperature sensor used for providing the feedback signal;
the sample base including support in the supporting seat of platform, sliding connection in just be used for placing at the top of supporting seat the laboratory bench of sample, connect in the supporting seat just is used for the drive the gliding driving piece of laboratory bench along first direction or second direction, first direction with second direction mutually perpendicular, just first direction with the second direction is located same horizontal plane, the part of laboratory bench passes through the second through-hole stretches into the experiment cavity.
2. The indentation experimental device according to claim 1, further comprising a motor connected to an inner wall of the electric cabinet and a fan connected to an output shaft of the motor, wherein the fan is located in the temperature control cavity, the liquid nitrogen spray head is controlled to be on or off by an electromagnetic valve, and the electromagnetic valve is electrically connected to the electric control member.
3. The indentation experimental apparatus according to claim 2, wherein the fan is a cross-flow fan.
4. The indentation experimental device according to claim 2, wherein the number of the temperature sensors is two, one of the temperature sensors is connected to the wall of the experimental cavity near the second through hole, and the other of the temperature sensors is connected to the wall of the experimental cavity near the third through hole.
5. The indentation experimental device according to claim 1, wherein a first sealing member for sealing a gap between the indenter and the wall of the first through hole is connected to the wall of the first through hole, and a second sealing member for sealing a gap between the sample base and the wall of the second through hole is connected to the wall of the second through hole.
6. The indentation experimental device according to claim 5, wherein the first and second seals are both aluminum silicate wool.
7. The indentation experimental apparatus according to claim 1, wherein the chamber door is provided with an observation window for observing the experimental cavity, and an experimental lamp for irradiating the sample is connected to a chamber wall of the experimental cavity.
8. An experimental method of indentation experiments, characterized in that the experiment is carried out by using the indentation experimental apparatus of any one of claims 1 to 7, the experimental method comprising:
mounting the indentation assembly on the top of the experimental box, so that the pressure head extends into the experimental cavity, placing the sample on the experiment table, placing the sample base on the platform, and so that the experiment table partially extends into the experimental cavity, sealing a gap between the pressure head and the hole wall of the first through hole, and sealing a gap between the sample base and the hole wall of the second through hole;
closing the box door and switching on the power supply of the experimental box;
setting a predetermined temperature;
the temperature sensor detects the experiment temperature in the experiment cavity in real time, and provides a feedback signal of the detected experiment temperature to the electric control part, and the electric control part controls the heating resistor to be powered on or powered off through the feedback signal, or controls the liquid nitrogen spray head to be opened or closed through the electric control part, so that the experiment temperature in the experiment cavity reaches the preset temperature;
after the experiment temperature reaches the preset temperature, waiting for 30 minutes;
controlling the servo motor to drive the end part of the pressure head to abut against the sample to perform an indentation experiment;
and turning off the power supply of the experimental box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210674977.6A CN114965018A (en) | 2022-06-15 | 2022-06-15 | Indentation experimental device and experimental method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210674977.6A CN114965018A (en) | 2022-06-15 | 2022-06-15 | Indentation experimental device and experimental method thereof |
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| CN114965018A true CN114965018A (en) | 2022-08-30 |
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| CN202210674977.6A Pending CN114965018A (en) | 2022-06-15 | 2022-06-15 | Indentation experimental device and experimental method thereof |
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