基于真实微观结构的铝/聚四氟乙烯复合材料力学性能的微观尺度模拟

Microscale Simulation on Mechanical Properties of Al/PTFE Composite Based on Real Microstructures.

作者信息

Ge Chao, Dong Yongxiang, Maimaitituersun Wubuliaisan

机构信息

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.

出版信息

Materials (Basel). 2016 Jul 19;9(7):590. doi: 10.3390/ma9070590.

DOI:10.3390/ma9070590

PMID:28773713

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5456924/

Abstract

A novel numerical method at the microscale for studying the mechanical behavior of an aluminum-particle-reinforced polytetrafluoroethylene (Al/PTFE) composite is proposed and validated experimentally in this paper. Two types of 2D representative volume elements (RVEs), real microstructure-based and simulated microstructures, are established by following a series of image processing procedures and on a statistical basis considering the geometry and the distribution of particles and microvoids, respectively. Moreover, 3D finite element modelling based on the same statistical information as the 2D simulated microstructure models is conducted to show the efficiency and effectiveness of the 2D models. The results of all simulations and experiments indicate that real microstructure-based models and simulated microstructure models are efficient methods to predict elastic and plastic constants of particle-reinforced composites.

摘要

本文提出了一种用于研究铝颗粒增强聚四氟乙烯（Al/PTFE）复合材料力学行为的微尺度新型数值方法，并通过实验进行了验证。通过一系列图像处理程序，分别基于颗粒和微孔的几何形状及分布，在统计基础上建立了两种二维代表性体积单元（RVE），即基于真实微观结构的和模拟微观结构的。此外，基于与二维模拟微观结构模型相同的统计信息进行了三维有限元建模，以展示二维模型的效率和有效性。所有模拟和实验结果表明，基于真实微观结构的模型和模拟微观结构模型是预测颗粒增强复合材料弹性和塑性常数的有效方法。