Compressive Stress Relaxation (CSR) Testing of Elastomers

Dilip Menon, R. Michael, David Gee
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Abstract

This paper presents Compressive Stress Relaxation (CSR) results for various elastomer samples to ascertain their performance in sealing applications. The paper presents results of percent retained sealing force (%RSF) behavior and its relationship with compression set and hardness. Materials studied are used in critical piping and medical seal applications. CSR methodology is used to benchmark various materials in terms of sealing performance. Potential problems with the current standard of testing have also been identified that can affect the resolution and variability of the test. The paper details all the steps involved to perform accurate CSR testing and discusses advantages and disadvantages CSR testing might have over conventional tests used to verify seal performance such as compression set. This is only an introductory study and requires further tests with the same elastomers subjected to other process conditions, such as heat aging are also studied to understand how they affect %RSF. This can also be expanded to other materials to build a database of standard %RSF behavior under identical conditions.
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弹性体的压缩应力松弛(CSR)试验
本文介绍了各种弹性体样品的压缩应力松弛(CSR)结果,以确定它们在密封应用中的性能。本文介绍了保留密封力百分比(%RSF)性能及其与压缩集和硬度的关系。所研究的材料用于关键管道和医疗密封应用。CSR方法用于对各种材料的密封性能进行基准测试。目前测试标准的潜在问题也已被确定,这些问题可能影响测试的分辨率和可变性。本文详细介绍了执行准确的CSR测试所涉及的所有步骤,并讨论了CSR测试与用于验证密封性能(如压缩集)的传统测试相比可能具有的优点和缺点。这只是一个介绍性的研究,需要在其他工艺条件下对相同的弹性体进行进一步的测试,例如热老化,以了解它们如何影响%RSF。这也可以扩展到其他材料,以建立在相同条件下标准%RSF行为的数据库。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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