计及时变演化特征的硅泡沫垫层非线性黏弹性模型研究
A Nonlinear Viscoelastic Model for Silicon Rubber Foam Cushion Considering Time-Varying Evolution Characteristics
范志庚 1万强 1牛红攀 1靳凡1
作者信息
- 1. 中国工程物理研究院 总体工程研究所,四川 绵阳 621900
- 折叠
摘要
基于黏弹性基本理论,引入材料非线性特征,考虑了材料加载、保载应力松弛历史、老化效应以及黏弹性模型各运动单元退化的差异性,并从两种老化机制出发,获得了老化硅泡沫垫层力学模型以及长时应力松弛硅泡沫垫层接续加载力学模型.模型机理清晰,能够反映材料服役历史信息及其对力学效应的影响.
Abstract
Based on the common theory of viscoelasticity,the mechanical model for aging silicon rubber foam cushion and the continuous loading prediction model for long-term stress relaxation silicon foam cushion,were obtained,in view of the 2 aging mechanisms,the nonlinear material characteristics,the loading process,the stress relaxation history,the aging effect and the degradation difference of each motion element of viscoelastic model.The mechanism of the model is clear,and it can reflect the information of the material service history and the corresponding effects on mechanics of the silicon rubber foam cushion.
关键词
硅泡沫垫层/非线性黏弹性/应力松弛/老化/力学模型Key words
silicon rubber foam cushion/nonlinear viscoelasticity/stress relaxation/aging/mechanical model引用本文复制引用
基金项目
国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(U2130206)
出版年
2024
国家科技期刊平台
NSTL
万方数据