基于RVE模型的颗粒填充聚合物复合材料的衰老性能预测
Huizhen Wang1, Congli Fang1, Yujiao Zhang1
1Smart Materials and Advanced Structure Laboratory, School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China.
Polymers
|December 23, 2023
概括
这项研究模拟了颗粒填充聚合物复合材料 (PFPC) 在热和氧化下的老化. 一个多尺度模型准确地预测了复合材料的模量和老化后的潮湿应变.
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:
- 颗粒填充的聚合物复合材料 (PFPC) 在热氧化条件下容易降解.
- 了解它们的老化性能对于预测使用寿命和确保结构完整性至关重要.
- 现有的模型往往缺乏对老 PFPC 的多尺度预测能力.
研究的目的:
- 在多个尺度上研究PFPC在热氧化条件下的老化性能.
- 开发可靠的多尺度模型来预测老化PFPC的机械性能.
- 通过实验数据验证模型的预测.
主要方法:
- 进行了高温加速老化试验.
- 使用随机粒子填充算法开发了一个代表性体积元素 (RVE) 模型.
- 模拟了聚合物氧化动力学以预测交叉连接密度,通过聚合物物理学与矩阵模量联系在一起.
- 粒子/矩阵接口是使用凝聚区模型 (CZM) 建模的,参数是通过反转技术确定的.
- 构建了一个全面的多尺度RVE模型.
主要成果:
- 多尺度RVE模型成功地预测了老 PFPC 的模量和潮湿应变.
- 预测的机械性能与实验测试结果有很好的一致性.
- 该模型在捕捉老化时间和温度的影响方面表现出可靠性.
结论:
- 开发的多尺度RVE模型为评估PFPC的老化性能提供了可靠的框架.
- 这项研究强调了考虑复合材料老化中的多尺度现象和接口行为的重要性.
- 这种方法可以帮助在要求苛刻的环境中设计和预测PFPC的寿命.
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