基于在热氧化老化下构成模型的基的密封性能
Haiqiang Shi1, Jian Wu1,2, Zhihao Chen1
1Center for Rubber Composite Materials and Structures, Harbin Institute of Technology, Weihai 264209, China.
Polymers
|February 13, 2026
概括
热氧化老化降解了密封的密封,随着时间的推移降低了密封的可靠性. 这项研究量化了老化效应,提供了用于预测关键应用中静态密封件使用寿命的数据.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物工程 聚合物工程
- 机械工程 机械工程
背景情况:
- 在极端温度下,基对于静态密封非常重要.
- 缺乏将热氧化老化与密封可靠性联系起来的定量数据.
- 了解老化影响对于安全关键的应用至关重要.
研究的目的:
- 确定热氧化老化和烯的密封可靠性之间的定量联系.
- 调查老化对Omega型密封件接触压力衰变的影响.
- 开发一个框架来预测密封件的使用寿命,并为维护计划提供信息.
主要方法:
- 机械测试 (次环境和室温).
- 压缩集的衰老实验. 压缩集的衰老实验.
- 表面分析 (SEM,FT-IR).表面分析 (SEM,FT-IR).表面分析 (SEM,FT-IR).表面分析 (SEM,FT-IR).表面分析 (SEM,FT-IR).表面分析 (SEM,FT-IR).表面分析 (SEM,FT-IR).表面分析 (SEM,FT-IR).表面分析 (SEM,FT-IR).
- 有限元模拟. 有限元模拟.
主要成果:
- 压缩集随着时间和温度的增加而增加,Arrhenius模型预测了使用寿命.
- SEM显示从柔性骨折转变为脆性骨折,而FT-IR显示表面氧化程度有限.
- 老化最初会增加接触压力,因为剪切模量更高,但被压缩集所抵消,导致净压力降低.
结论:
- 尽管老化效应,预测接触压力仍然高于冷应用的密封度标准.
- 开发的框架为老化,温度和预负载放松提供了确定性边界.
- 这使得密封件的风险知情维护和更换时间表成为可能.
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