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Thermoplastic elastomer accelerated creep test method

A thermoplastic elastomer, accelerated creep technology, applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems of inability to accurately obtain the shift factor, error in experimental results, long test time, etc., to shorten the test time. , the effect of overcoming errors and saving costs

Pending Publication Date: 2021-07-09
SHANGHAI UNIV OF ENG SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the time-temperature equivalent method has the following disadvantages: 1. Multiple samples will cause errors in the experimental results; 2. The test time is long and the cost is high; 3. The shift factor cannot be accurately obtained

Method used

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  • Thermoplastic elastomer accelerated creep test method
  • Thermoplastic elastomer accelerated creep test method
  • Thermoplastic elastomer accelerated creep test method

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Embodiment

[0030] The time-temperature equivalence principle can be used to observe the creep behavior for a long time by increasing the temperature. The Boltzmann superposition principle believes that the deformation of the sample is a function of the load history. When multiple loads act on the polymer together, each load is independent. , can be superimposed on each other. Based on the above principles, multiple samples can be tested at each temperature, and a single sample can be used instead of a step temperature, and the number of test samples can be reduced by increasing the test conditions. Based on this thinking, the present invention provides a kind of thermoplastic elastomer accelerated creep test method, and this method comprises the following steps:

[0031] Step 1: Perform a constant force creep tensile test within the temperature range of the test to obtain a creep curve of the material.

[0032] Among them, the temperature range of the creep tensile test is usually the t...

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Abstract

The invention relates to a thermoplastic elastomer accelerated creep test method, which comprises the following steps: 1) carrying out a constant force creep tensile test on a thermoplastic elastomer in a test temperature interval to obtain a creep curve of the thermoplastic elastomer; (2) vertically moving the curve of each section of temperature step of the creep curve of the thermoplastic elastomer to eliminate the influence of thermal expansion; (3) eliminating uncertain creep deformation in the transition area of the curve of each section of temperature step; and 4) horizontally moving the curve of each temperature step at the reference temperature to obtain a main creep curve of the thermoplastic elastomer at the reference temperature, and completing the accelerated creep test of the thermoplastic elastomer. Compared with the prior art, the method has the advantages of simple operation, cost saving, effective long-term creep prediction and the like.

Description

technical field [0001] The invention relates to the technical field of material performance testing, in particular to a thermoplastic elastomer accelerated creep testing method. Background technique [0002] The traditional high-temperature creep analysis of materials often uses the control variable method to conduct multiple sets of creep experiments at different temperatures to obtain the effect of temperature on material properties, especially for thermoplastic elastomers. Creep is a long process, and conventional creep experiments generally last for 1000 hours, and the principle of time-temperature equivalence is usually used to accelerate the creep behavior. The principle of time-temperature equivalence is to observe the long-term creep behavior of materials in a short period of time by appropriately increasing the temperature. However, the time-temperature equivalent method has the following disadvantages: 1. Multiple samples will cause errors in the experimental resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18
CPCG01N3/18
Inventor 马丽凤江超刘聪超徐新虎
Owner SHANGHAI UNIV OF ENG SCI
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