温度和应变率相关的变形行为UHMWPE纤维增强复合材料的温度和应变率相关的变形行为
Chenhong Yi1, Jianhui Xu1,2,3,4, Lizhi Tian1
1Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621000, China.
Polymers
|May 11, 2024
概括
超高分子量聚乙烯 (UHMWPE) 纤维复合材料在拉伸试验中显示温度和拉伸率灵敏度. 一个新的模型准确地预测了它们在屈服之前的非线性粘弹性行为.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 机械工程 机械工程
背景情况:
- 超高分子量聚乙烯 (UHMWPE) 纤维增强复合材料是先进的弹道防护材料,由于其优越的特定强度,模量和能量吸收.
- 这些复合材料在保护应用中越来越多地取代了传统材料,如陶和钢.
研究的目的:
- 研究拉伸率和温度对UHMWPE纤维增强复合材料的拉伸性能的影响.
- 开发和验证一个构成模型,用于预测这些复合材料在不同条件下的变形.
主要方法:
- 对UHMWPE纤维增强复合材料进行了单轴拉伸测试,在-20°C至80°C的温度范围内,拉伸速率为10−4s−1和10−2s−1.
- 开发了一种现象学粘弹性构成模型,包含非线性弹和非线性麦克斯韦元件.
主要成果:
- UHMWPE纤维增强复合材料表现出对拉伸率和温度都敏感的非线性拉伸反应.
- 收益强度和收益模量随着温度的增加而下降,随着延展率的增加而增加.
- 拟议的构成模型准确地预测了非线性粘弹性反应,然后在准静态负荷下在广泛的温度范围内产生.
结论:
- UHMWPE纤维增强复合材料的拉伸性能受到温度和拉伸率的显著影响.
- 开发的粘弹性构成模型有效地捕捉了产前变形特征,为材料设计和性能预测提供了有价值的工具.
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