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

作　　者：范志庚[1] 万强[1] 牛红攀[1] 靳凡[1] FAN Zhigeng;WAN Qiang;NIU Hongpan;JIN Fan(Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang,Sichuan 621900,P.R.China)

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《应用数学和力学》2024年第2期167-174,共8页Applied Mathematics and Mechanics

基　　金：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)。

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.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 

分 类 号：O341[理学—固体力学]