材料科学
粘弹性
蠕动
复合材料
复合数
有限元法
本构方程
基质(化学分析)
聚合物
微观力学
粒子(生态学)
极限抗拉强度
粘塑性
结构工程
海洋学
工程类
地质学
作者
Hao Yan,Jiangtao Zhang,P-C. Zhai
标识
DOI:10.1179/1432891714z.000000000820
摘要
In this paper, a two-dimensional discrete element model (DEM) was adopted to predict the creep behaviour of polymer matrix particle reinforced composite PI/SiO2. The polymer matrix was simulated by regularly and closely compacted disks which were bonded together with viscoelastic Burger’s model. The parameters of the Burger’s bond model were derived based on their macroscale material properties. The elastic filler particles with different contents randomly distributed in the models and bonded with the neighbouring matrix disks. Tensile tests of the PI/SiO2 composite with different SiO2 contents under constant loading were performed based on the developed DEM models. The creep strain curves were presented and compared with finite element method (FEM) results. The favourable agreement between the DEM results and the FEM results indicate that the viscoelastic DEM model developed in this study is very capable of simulating constitutive behaviour of PI/SiO2 composites.
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