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Compressive stress relaxation testing device and method of rubber material

A compressive stress, rubber material technology, used in measuring devices, analyzing materials, using stable tension/pressure to test the strength of materials, etc. Complex structure and other problems, to achieve the effect of easy actual control, quick and effective judgment, and simple structure design

Pending Publication Date: 2018-11-16
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of testing principle, the stress test experiment is to test the attenuation of the load (that is, the force on it) under constant deformation, but since the measurement of force must be reflected by the deformation of the material, it is necessary to measure both the deformation and the force. This is the difficulty in the design and manufacture of stress relaxation devices
[0003] The Chinese patent literature database discloses Wang Keming's "A Compressive Stress Relaxation Detection Device" (201620536105.3), Li Xinyan, Zhang Xiongsheng, Bu Haoran's "Creep Stress Relaxation Tester" (201330639984.4), Shen Mingxue, Li Xinxin, Peng Xudong, etc. " A Device for High Temperature Creep Test and Stress Relaxation Test of Rubber Elastic Body" (201610649869.8), these devices for testing rubber materials are too complicated in structure, large in size, unable to obtain continuous online experimental data, and difficult to implement in special environments Study on Long-term Properties of Rubber Materials under Controlled Conditions

Method used

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  • Compressive stress relaxation testing device and method of rubber material
  • Compressive stress relaxation testing device and method of rubber material
  • Compressive stress relaxation testing device and method of rubber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Put the sample 6 that has been cut (cut into a circle, square or rectangle, etc.) to be tested flat on the support surface of the fixed end 7 of the sample platen; turn on the power switch 8, and reset the initial compressive stress value Fa to zero ; Rotate the pressure plate movement adjustment knob 3, so that the moving end 5 of the sample pressure plate moves down along the slide rail 4 until it just touches the upper surface of the sample 6, at this time, the data display screen 1 begins to display the compressive stress data; continue to rotate the pressure plate The disc moves the adjustment knob 3 until the sample 6 is compressed to the predetermined compression amount. At this time, the compressive stress data on the data display 1 is recorded as F; after 30 minutes, the corresponding compressive stress value is recorded as F0, and F0 is the value of the sample 6 at the predetermined compression. Continue to maintain the position of the moving end 5 of the sampl...

Embodiment 2

[0040]Place the sample 6 that has been cut (cut into a circle, square or rectangle, etc.) to be tested flat on the support surface of the fixed end 7 of the sample platen; turn on the power switch 8, and record the initial compressive stress value Fa; rotate The pressure plate moves the adjustment knob 3, so that the moving end 5 of the sample pressure plate moves down along the slide rail 4 until it just touches the upper surface of the sample 6, at this time, the data display screen 1 starts to display the compressive stress data; continue to rotate the pressure plate to move Adjust the knob 3 until the sample 6 is compressed to the predetermined compression amount. At this time, the compressive stress data on the data display screen 1 is recorded as F; after 30 minutes, the corresponding compressive stress value is recorded as F0, and F0 is the sample 6 under the predetermined compression amount. Continue to maintain the position of the moving end 5 of the sample platen, and...

Embodiment 3

[0042] Place the cut circular rubber foam material sample 6 flatly on the support surface of the sample platen fixed end 7; turn on the power switch 8, and reset the initial compressive stress value Fa to zero; rotate the platen to move the adjustment knob 3. Make the moving end 5 of the sample platen move down along the slide rail 4 until it is just in contact with the upper surface of the sample 6. At this time, the data display screen 1 begins to display the compressive stress data; continue to rotate the platen movement adjustment knob 3 until Compress sample 6 to 50% of the predetermined compression amount (that is, compress the sample to 50% of the original thickness), and at this time, the compressive stress data on the data display 1 is recorded as F; after 30 minutes, the corresponding compressive stress value is recorded as F0, F0 is the initial compressive stress of the sample 6 under a predetermined amount of compression; continue to maintain the position of the mov...

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Abstract

The invention discloses a compressive stress relaxation testing device and method of a rubber material. The compressive stress relaxation testing device comprises a sample compressing module and a data acquisition module, wherein the sample compressing module is a functional unit for bearing a sample and adjusting and compressing the sample to predetermined compression amount or rate, and the dataacquisition module is a functional unit for acquiring a compressive stress value corresponding to time. The compressive stress relaxation testing method comprises the steps that firstly, the sample is flatly placed on the supporting face of a sample pressing plate fixing end and is compressed to the predetermined compression amount or rate through a rotary pressing plate movement adjusting knob,the compressive stress value corresponding to testing time is acquired, and then data processing is performed to obtain a compressive stress relaxation curve of the sample and stress relaxation ratescorresponding to different service times. The device is simple in structural design and convenient to control actually. The method is a real-time monitoring method, testing results are accurate, the method has no special requirements for sample shapes, only the upper surface and the lower surface need to flush and smooth, the judgment on stress relaxation degree and evolutionary trend is quick, convenient and effective, and the device and the method are especially suitable for assessment of materials for long-term service.

Description

technical field [0001] The invention belongs to the technical field of testing mechanical properties of materials, and in particular relates to a compression stress relaxation testing device and a testing method for rubber materials. Background technique [0002] With the gradual advancement of the construction of the material gene bank from all levels, it is very important to fully understand and master the performance parameters of materials, especially for those advanced functions that are applied in the fields of weaponry, aerospace, energy technology, etc. and require long-term service The stability of materials must be evaluated before they are put into use, so it is of great significance to study the performance effects of materials in specific environments such as long-term tensile / compressive stress loading. In terms of testing principle, the stress test experiment is to test the attenuation of the load (that is, the force on it) under constant deformation, but sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/06
CPCG01N3/06G01N3/08G01N2203/0019
Inventor 宋宏涛高小铃张行泉黄玮邓盟坤安友
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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