CN206656979U - It is a kind of to be used to measure rubber and the experimental provision of intermetallic contact thermal resistance - Google Patents
It is a kind of to be used to measure rubber and the experimental provision of intermetallic contact thermal resistance Download PDFInfo
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- CN206656979U CN206656979U CN201720382264.7U CN201720382264U CN206656979U CN 206656979 U CN206656979 U CN 206656979U CN 201720382264 U CN201720382264 U CN 201720382264U CN 206656979 U CN206656979 U CN 206656979U
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 40
- 239000005060 rubber Substances 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 99
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000005057 refrigeration Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 abstract description 5
- 238000002474 experimental method Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000205 computational method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 108010074506 Transfer Factor Proteins 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
The utility model disclose it is a kind of be used for measure rubber and the experimental provision of intermetallic contact thermal resistance, it includes：Rubbery sample, in cylinder；Test button, in cylinder, the contact surface of test button contacts with the contact surface of rubbery sample；Component is heated, for the heating face heating to rubbery sample, the heating face of rubbery sample and the contact surface of rubbery sample are oppositely arranged；Cooling assembly, for the chill surface refrigeration to test button, the chill surface of test button and the contact surface of test button are oppositely arranged；Detection components, for detecting the temperature of rubbery sample and test button.The utility model is simple in construction, simple operation, can effectively measure rubber and intermetallic contact thermal resistance, and measured value is accurate, and the degree of accuracy is high.
Description
Technical field
It the utility model is related to a kind of for measuring rubber and the experimental provision of intermetallic contact thermal resistance.
Background technology
Rubber tyre in actual use, hot biography can be produced between rubber and metal (such as wheel rim, rotary drum material)
Lead, this heat transfer can produce certain influence to the rolling resistance of tire.With rapid to open up, the Computer Simulation of computer
Technology has been widely developed, and when tyre temperature field emulation technology is used, rolling is must take into consideration to improve analog simulation precision
Dynamic resistance testing machine rotary drum (metal) and the heat transfer factor on rubber for tire surface.
But in the prior art, also it is used to measure rubber and intermetallic contact thermal resistance without unified perfect experimental provision.
Utility model content
In order to solve the above-mentioned technical problem, it is used to measure rubber and intermetallic contact thermal resistance the utility model proposes one kind
Experimental provision, its is simple in construction, and simple operation, measured value is accurate, and basis is provided for the experimental study of rubber tyre.
In order to achieve the above object, the technical solution of the utility model is as follows：
It is a kind of to include for measuring rubber and the experimental provision of metal thermal contact resistance：Rubbery sample, in cylinder；Metal tries
Sample, in cylinder, the contact surface of test button contacts with the contact surface of rubbery sample；Component is heated, for the system to rubbery sample
Hot face heating, the heating face of rubbery sample and the contact surface of rubbery sample are oppositely arranged；Cooling assembly, for test button
Chill surface freezes, and the chill surface of test button and the contact surface of test button are oppositely arranged；Detection components, for detecting rubber examination
The temperature of sample and test button.
The utility model is simple in construction, simple operation, can effectively measure rubber and intermetallic contact thermal resistance, measured value essence
Standard, the degree of accuracy are high.
On the basis of above-mentioned technical proposal, following improvement can be also done：
As preferable scheme, detection components include：First detector, for detecting the rubber close to rubbery sample heating face
The temperature of glue sample high temperature side pilot；Second detector, surveyed for detecting the rubbery sample low temperature away from rubbery sample heating face
The temperature of pilot；3rd detector, for detecting the temperature of the test button high temperature side pilot away from test button chill surface；The
Four detectors, for detecting the temperature of the test button low-temperature test point close to test button chill surface.
Using above-mentioned preferable scheme, rubber and intermetallic contact thermal resistance can be effectively measured, measured value is accurate.
As preferable scheme, detection components also include the 5th detector, and the 5th detector connects for detecting test button
Temperature between contacting surface and rubbery sample contact surface.
Using above-mentioned preferable scheme, the degree of accuracy of the experiment can be effectively judged.
As preferable scheme, through hole, the first detector and second are provided with the center of test button and rubbery sample
Detector is arranged in the through hole of rubbery sample, and the 3rd detector and the 4th detector are arranged in the through hole of test button.
Using above-mentioned preferable scheme, the first detector, the second detector, the 3rd detector and the installation of the 4th detector are just
Victory, the temperature data measured are reliably effective.
As preferable scheme, heating component, rubbery sample, test button, cooling assembly are from top to bottom set successively.
Using above-mentioned preferable scheme, simple in construction, install convenient.
As preferable scheme, be provided with load component in the top of heating component, load component be used for for rubbery sample with
Test button is pressurized, and is provided with pressure sensor in the chill surface of test button.
Using above-mentioned preferable scheme, during measurement, load component, which applies certain pressure, can effectively simulate tire reality
Grounding, using pressure sensor detect pressure value so as to adjust in real time load component application pressure.
As preferable scheme, heat-conducting plate is additionally provided between cooling assembly and the chill surface of test button.
Using above-mentioned preferable scheme, heat-conducting plate carries out heat transfer, increases the stability of experimental provision.
As preferable scheme, radiator is provided with the side of cooling assembly.
Using above-mentioned preferable scheme, radiator radiates to cooling assembly, reduces its operating temperature, avoids refrigeration train
The operating temperature of part passes to test button.
As preferable scheme, rubber heat insulating is provided between load component and heating component.
Using above-mentioned preferable scheme, the heat transfer by component is heated is avoided to load component.
As preferable scheme, heat-insulation layer is provided with the outer wall of rubbery sample and/or test button.
Using above-mentioned preferable scheme, heat-insulation layer prevents heat losses, ensures the accurate of measurement.
Brief description of the drawings
Fig. 1 is that a kind of of the utility model embodiment offer is used to measure rubber and the experimental provision of metal thermal contact resistance
Front view.
Fig. 2 is the sectional view of the rubbery sample that the utility model embodiment provides and test button.
Wherein：1 rubbery sample, 101 rubbery sample contact surfaces, 102 rubbery samples heating face, 2 test buttons, 201 metals
Sample contacts face, 202 test button chill surfaces, 3 heating components, 4 cooling assemblies, 5 detection components, 51 first detectors, 52 the
Two detectors, 53 the 3rd detectors, 54 the 4th detectors, 6 load components, 7 pressure sensors, 8 heat-conducting plates, 9 radiators, 10 rubbers
Glue heat insulating mattress, 11 heat-insulation layers.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with the accompanying drawings.
In order to reach the purpose of this utility model, it is a kind of be used to measuring rubber and the experimental provision of metal thermal contact resistance its
In in some embodiments,
It is a kind of to include for measuring rubber and the experimental provision of metal thermal contact resistance：Rubbery sample 1, test button 2, heating
Component 3, cooling assembly 4 and detection components 5.
Rubbery sample 1 is in cylinder, for simulating tire.Test button 2 is in cylinder, for simulating such as wheel rim metal material
Matter, the contact surface 201 of test button contact with the contact surface 101 of rubbery sample.Component 3 is heated for the system to rubbery sample
Hot face 102 is heated, and the heating face 102 of rubbery sample is oppositely arranged with the contact surface 101 of rubbery sample.Cooling assembly 4 is used to give
The chill surface 202 of test button freezes, and the chill surface 202 of test button is oppositely arranged with the contact surface 201 of test button.Detection
Component 5 is used for the temperature for detecting rubbery sample 1 and test button 2.
The utility model is simple in construction, simple operation, and rubbery sample 1 and test button 2 are measured using detection components 5
Temperature distribution state, the heat that calculating is flowed through between rubbery sample 1 and test button 2 is poor, so as to obtain contact between the two
Thermal resistance, measured value is accurate, and the degree of accuracy is high.
As illustrated in fig. 1 and 2, in order to further optimize implementation result of the present utility model, in other embodiment
In, remaining feature technology is identical, and difference is, detection components 5 include：First detector 51, the second detector 52,
Three detectors 53 and the 4th detector 54.
First detector 51 is used for the temperature for detecting the rubbery sample high temperature side pilot close to rubbery sample heating face 102；
Second detector 52 is used for the temperature for detecting the rubbery sample low-temperature test point away from rubbery sample heating face 102；3rd detection
Device 53 is used for the temperature for detecting the test button high temperature side pilot away from test button chill surface 202；4th detector 54 is used for
Temperature of the detection close to the test button low-temperature test point of test button chill surface 202.
Heating component 3, rubbery sample 1, test button 2, cooling assembly 4 are from top to bottom set successively.
Load component 6 is provided with the top of heating component 3, load component 6 is used to increase for rubbery sample 1 and test button 2
Pressure, and it is provided with pressure sensor 7 in the chill surface of test button.During measurement, load component 6 applies certain pressure can be effective
The actual Grounding of tire is simulated, detects pressure value using pressure sensor 7 to adjust the application of load component 6 in real time
Pressure.
This experimental provision flows through the heat between two contact samples by analysis, calculates thermal contact resistance between the two.Specifically
Computational methods are as follows：
Because the thermal physical property parameter of elastomeric material is presented compared with strong linear relationship with temperature, therefore its Equivalent Thermal Conductivities such as formula
(1) shown in：
Wherein, enter1For the thermal conductivity factor of rubbery sample high temperature side pilot, unit is W/ (mk)；
λ2For the thermal conductivity factor of rubbery sample low-temperature test point；
λ12For the Equivalent Thermal Conductivities of rubbery sample.
Shown in the heat such as formula (2) for flowing through rubbery sample：
Wherein, Q12To flow through the heat of rubbery sample, unit J；
d12For in rubbery sample, the distance between the first detector 51 and the two temperatures sensor of the second detector 52, unit
For m；
A is rubbery sample cross-sectional area, unit m2；
T1For rubbery sample high temperature measuring point temperature, unit is DEG C；
T2For rubbery sample low temperature measuring point temperature, unit is DEG C.
Shown in the heat such as formula (3) for flowing through test button：
Wherein, Q34To flow through the heat of road surface sample；
λ3For the thermal conductivity factor of test button；
d34For the distance between the 3rd detector 53 and the two temperatures sensor of the 4th detector 54 in test button；
T3For test button high temperature measuring point temperature, unit is DEG C；
T4For test button low temperature measuring point temperature, unit is DEG C.
Therefore, the mean heat flux size for flowing through two samples is Q, as shown in formula (4)：
Shown in rubbery sample contact surface temperature such as formula (5)：
Wherein, THFor temperature at rubbery sample contact surface；
dAFor T1With T2The spacing of temperature measuring point；
dBFor T2Temperature measuring point to rubbery sample contact surface distance.
Shown in road surface sample contacts face temperature such as formula (6)：
Wherein, TCFor temperature at test button contact surface；
dCFor T3With T4Spacing between temperature measuring point；
dDFor T4Temperature measuring point to test button contact surface distance.
Therefore, shown in the thermal contact resistance computational methods such as formula (7) between rubbery sample 1 and the sample of test button two：
θ is the thermal contact resistance between two samples, unit Km2/W。
Using above-mentioned preferable scheme, rubber and intermetallic contact thermal resistance can be effectively measured, measured value is accurate.
Tested below with a kind of experimental provision for being used to measure rubber and metal thermal contact resistance of the utility model.
In the selection of experimental provision, cooling assembly 4 selects semiconductor chilling plate, and maximum refrigeration work consumption is 168W.Heating
Component 3 selects Kapton Kapton PI Electric radiant Heating Films, radius 50mm, peak power 80W.Whole inspections in test module
Survey device and select WRNK-191 type armoured thermocouples, measurement accuracy is 0.1 DEG C, a diameter of 1mm.Rubbery sample 1 passes through rubber sulphur
Change and obtain, size is diameter 50mm, height 70mm cylinder.To simulate drum surface, this experiment is from identical with rubbery sample
The round steel bar of size makes test button.
Thermal contact resistance test procedure is as follows：Assembly experiment device, thermocouple and temperature measurer are installed.Open semiconductor chilling plate
And PI Electric radiant Heating Films, according to operation conditions both power of adjustment until constant at least 30 minutes of measuring point temperature, now records rubber examination
The high/low temperature of sample is respectively T1With T2, the high/low temperature of test button is respectively T3With T4, by T1、T2、T3、T4Processor is sent to, is located
Reason device is handled.
Temperature change in each measuring point ten hours is as shown in table 1.In table 1, test point 1 is rubbery sample high temperature measuring point；Survey
Pilot 2 is rubbery sample low temperature measuring point, and test point 3 is test button high temperature measuring point；Test point 4 is test button low temperature measuring point.
Table 1 tests measuring point temperature
As shown in Table 1, after test run 10 hours, observe that each measuring point temperature change is respectively less than 0.5 DEG C, it is believed that sample temperature
Degree reaches stable state.Processor can be calculated rubbery sample contact surface temperature T by formula (5) and (6)HFor 21.89 DEG C, test button
Contact surface temperature TCFor 20.96 DEG C.So as to, processor, which calculates, to be understood, under conditions of surfacing and applying effect load, Q12
For 0.792J, Q34For 0.404J, the heat flux of every square metre of Rubber loss is 198W, with contact area 0.0187m2Calculate, connect
The thermal loss speed for touching region is 3.7J/S.Thermal contact resistance between the two is 0.0062Km2/W。
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, detection components 5 also include the 5th detector 55, and the 5th detector connects for detecting test button
Temperature between contacting surface and rubbery sample contact surface.
Using above-mentioned preferable scheme, the degree of accuracy of the experiment can be effectively judged.
Tested with above-mentioned experiment identical, increase by the 5th detector 55, the temperature change in each measuring point ten hours is such as
Shown in table 2.In table 2, test point 5 is the measuring point that rubbery sample 1 and test button contact surface are set, and the measuring point is used for result ratio
Right, temperature is designated as T5。
Table 2 tests measuring point temperature
As shown in Table 2, the temperature of measuring point 5 is 21.9 DEG C, and contact surface temperature calculations are distinguished smaller with test value, it is believed that the reality
It is higher to test precision.Processor can detect obtained temperature value and the contact surface temperature value being calculated by the 5th detector 55
Contrasted, if temperature difference, which is less than, allows worst error, then it is assumed that the Success in Experiment, if temperature difference, which is less than, allows worst error,
Then think the failure of an experiment, the thermal contact resistance value measured there may be deviation, it is necessary to remeasure.
Further, in order to closer to true, coarse processing can be carried out in the contact surface of test button, such as use coarse sandpaper
Specimen surface polish to simulate drum surface roughness.
Further, can be the machine for being arranged at the top of heating component 3 by load component 6 in order to improve the intellectuality of device
Tool arm, pressure sensor 6 are connected with controller, the lower surging of controller control machinery arm.
Further, on the basis of above-mentioned embodiment, it is provided with the center of test button 2 and rubbery sample 1 logical
Hole, the first detector 51 and the second detector 52 are arranged in the through hole of rubbery sample 1, the 3rd detector 53 and the 4th detection
Device 54 is arranged in the through hole of test button 2.
Using above-mentioned preferable scheme, the first detector 51, the second detector 52, the 3rd detector 53 and the 4th detector
54 install convenients, the temperature data measured are reliably effective.In order to improve the steadiness of installation, can add on the inner walls of the via
Step surface, each detector are installed on its step surface.
Further, on the basis of above-mentioned embodiment, also set up between cooling assembly 4 and the chill surface of test button
There is heat-conducting plate 8.
Using above-mentioned preferable scheme, heat-conducting plate 8 carries out heat transfer, increases the stability of experimental provision.
Further, on the basis of above-mentioned embodiment, radiator 9 is provided with the side of cooling assembly 4.
Using above-mentioned preferable scheme, radiator 9 radiates to cooling assembly 4, reduces its operating temperature, avoids freezing
The operating temperature of component 4 passes to test button 2.
Further, it is heat-insulated provided with rubber between load component 6 and heating component 3 on the basis of above-mentioned embodiment
Pad 10.
Using above-mentioned preferable scheme, the heat transfer by component 3 is heated is avoided to load component 6.
Further, on the basis of above-mentioned embodiment, insulation is provided with the outer wall of rubbery sample 1 and test button 2
Layer 11.
Using above-mentioned preferable scheme, heat-insulation layer 11 prevents heat losses, ensures the accurate of measurement.Heat-insulation layer 11 can select
With 2cm thickness asbestos shingles, or other insulation materials.In order to improve heat insulation effect, pressure can be added on the outer wall of heat-insulation layer 11
Mechanism, improve the contact area between heat-insulation layer 11 and rubbery sample 1 and test button 2.
The above is only preferred embodiment of the present utility model, it is noted that for one of ordinary skill in the art
For, on the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these belong to this
The protection domain of utility model.
Claims (10)
1. a kind of be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that including：
Rubbery sample, in cylinder；
Test button, in cylinder, the contact surface of the test button contacts with the contact surface of the rubbery sample；
Component is heated, for the heating face heating to the rubbery sample, the heating face of the rubbery sample is tried with the rubber
The contact surface of sample is oppositely arranged；
Cooling assembly, for the chill surface refrigeration to the test button, the chill surface of the test button tries with the metal
The contact surface of sample is oppositely arranged；
Detection components, for detecting the temperature of the rubbery sample and the test button.
2. according to claim 1 be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that described
Detection components include：
First detector, for detecting the temperature of the rubbery sample high temperature side pilot close to rubbery sample heating face；
Second detector, for detecting the temperature of the rubbery sample low-temperature test point away from rubbery sample heating face；
3rd detector, for detecting the temperature of the test button high temperature side pilot away from the test button chill surface；
4th detector, for detecting the temperature of the test button low-temperature test point close to the test button chill surface.
3. according to claim 2 be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that described
Detection components also include the 5th detector, and the 5th detector is used to detect the test button contact surface and rubber examination
Temperature between sample contact surface.
4. according to claim 3 be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that in institute
State and through hole is provided with the center of test button and the rubbery sample, first detector and second detector are arranged at
In the through hole of the rubbery sample, the 3rd detector and the 4th detector are arranged at the through hole of the test button
It is interior.
5. according to claim any one of 1-4 be used for measure rubber and the experimental provision of metal thermal contact resistance, its feature
It is, the heating component, the rubbery sample, the test button, the cooling assembly are from top to bottom set successively.
6. according to claim 5 be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that in institute
The top for stating heating component is provided with load component, and the load component is used to increase for the rubbery sample and the test button
Pressure, and it is provided with pressure sensor in the chill surface of the test button.
7. according to claim 6 be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that in institute
State and be additionally provided with heat-conducting plate between the chill surface of cooling assembly and the test button.
8. according to claim 7 be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that in institute
The side for stating cooling assembly is provided with radiator.
9. according to claim 8 be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that in institute
State and be provided with rubber heat insulating between load component and the heating component.
10. according to claim 9 be used to measure rubber and the experimental provision of metal thermal contact resistance, it is characterised in that
The outer wall of the rubbery sample and/or the test button is provided with heat-insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720382264.7U CN206656979U (en) | 2017-04-12 | 2017-04-12 | It is a kind of to be used to measure rubber and the experimental provision of intermetallic contact thermal resistance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720382264.7U CN206656979U (en) | 2017-04-12 | 2017-04-12 | It is a kind of to be used to measure rubber and the experimental provision of intermetallic contact thermal resistance |
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| Publication Number | Publication Date |
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| CN206656979U true CN206656979U (en) | 2017-11-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870179A (en) * | 2017-12-15 | 2018-04-03 | 扬州大学 | Method for measuring bituminous concrete thermal contact resistance |
| CN108007964A (en) * | 2017-12-27 | 2018-05-08 | 齐鲁工业大学 | A kind of thermal contact resistance test device and test method |
| CN108828003A (en) * | 2018-06-09 | 2018-11-16 | 安徽华兴车辆有限公司 | A kind of solid material thermal contact resistance measuring device and measuring method |
| CN110779954A (en) * | 2019-11-20 | 2020-02-11 | 上海交通大学 | Device and method for measuring contact heat conductivity coefficient in plastic deformation state |
-
2017
- 2017-04-12 CN CN201720382264.7U patent/CN206656979U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870179A (en) * | 2017-12-15 | 2018-04-03 | 扬州大学 | Method for measuring bituminous concrete thermal contact resistance |
| CN108007964A (en) * | 2017-12-27 | 2018-05-08 | 齐鲁工业大学 | A kind of thermal contact resistance test device and test method |
| CN108828003A (en) * | 2018-06-09 | 2018-11-16 | 安徽华兴车辆有限公司 | A kind of solid material thermal contact resistance measuring device and measuring method |
| CN110779954A (en) * | 2019-11-20 | 2020-02-11 | 上海交通大学 | Device and method for measuring contact heat conductivity coefficient in plastic deformation state |
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