Simulation of Elastic and Fatigue Properties of Epoxy/SiO_(2) Particle Composites through Molecular Dynamics

作     者：Gaoge Zhao Jianzhong Chen Yong Lv Xiaoyu Zhang Li Huang 

作者机构：Hubei Key Laboratory of Theory and Application of Advanced Materials MechanicsSchool of ScienceWuhan University of TechnologyWuhan430070China 

出 版 物：《Computer Modeling in Engineering & Sciences》 (工程与科学中的计算机建模（英文）)

年 卷 期：2021年第128卷第7期

页      面：339-357页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Fundamental Research Funds for the Central Universities  (2018IB001  2019III130CG) 

主　　题：SiO_(2)particle elastic modulus fatigue free volume molecular dynamics 

摘      要：The influence of different nanoparticle sizes on the elastic modulus and the fatigue properties of epoxy/SiO_(2) nanocomposite is studied in this ***,the cross-linked epoxy resins formed by the combination of DGEBA and 1,3-phenylenediamine are used as the matrix phase,and spherical SiO_(2) particles are used as the reinforcement *** order to simulate the elastic modulus and long-term performance of the composite material at room temperature,the simulated temperature is set to 298 K and the mass fraction of SiO_(2) particles is set to 28.9%.The applied strain rate is 109/s during the simulation of the elastic *** results show that the elastic modulus of the material increases with the increase in particle ***,fatigue simulation under strain control is performed on the model with SiO_(2) nanoparticle radius of 12˚*** results indicate that the influence trend of variable frequencies on the fatigue mechanical response is similar,and the mean stress decreases with the increase in number of *** addition,the smaller the loading period and the more the number of cycles,the greater the mean stress ***,the change in energy and free volume fraction are evaluated under fatigue loading condition.