温度对加速老化EPDM超弹性机械行为的影响
Zhaonan Xie1, Dong Jia1,2, Xicheng Huang1,2
1Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, China.
Polymers
|June 27, 2025
概括
老化乙烯二烯单体 (EPDM) 会影响其机械性能. 这项研究揭示了温度如何影响老化的EPDM.
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:
- 乙烯二烯单体 (EPDM) 是一种重要的工程材料.
- 它的机械特性,特别是超弹性行为,对老化和温度敏感.
- 了解这些影响对于预测各种应用中的材料性能至关重要.
研究的目的:
- 研究老化时间和温度对EPDM的超弹性行为的影响.
- 量化老化,温度和EPDM的机械反应之间的关系.
- 开发一个构成模型,准确预测老化的EPDM在不同温度的行为.
主要方法:
- 在EPDM样本上进行了加速老化测试.
- 单轴压缩测试在各种温度下对未经老化和老化样本进行.
- 建构模型 (Neo-Hooke,Mooney-Rivlin,改进的Mooney-Rivlin) 被评估为它们适应实验数据的能力.
主要成果:
- 长时间的老化导致EPDM在恒定温度下出现线性硬化趋势.
- 陈旧的EPDM的刚性最初下降,然后随着测试温度的增加而增加.
- 一个改进的穆尼-里夫林模型证明最适合实验数据,参数扩展以考虑衰老和温度效应.
结论:
- 开发的构成模型有效地描述了老式EPDM在不同温度下的超弹性行为.
- 该研究提供了关于老化,温度和EPDM机械性能之间的复杂相互作用的见解.
- 这项研究有助于为涉及EPDM的工程应用提供更准确的材料建模.
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