固体火箭技术Issue(4)：541-544,4.DOI:10.7673/j.issn.1006-2793.2014.04.021
SiCp／2024Al 复合材料微观结构建模及动态力学性能评估
Microstructure-based modeling and evaluation of dynamic behaviors of SiCp/2024Al composites①
摘要
Abstract
Using the information of image processing and recognition,a microstructure-based finite element model ( FEM) is es-tablished to evaluate the dynamic properties of SiCp/2024Al composites at strain rates ranging from 200 to 14 000 s-1.In the micro-structure-based model,the irregular SiC particles are randomly distributed in the metal matrix.The results show that the flow stress of SiCp/2024Al composites with low particle volume fraction increases firstly to a maximum value and then decreases with the increas-ing of strain rate during adiabatic compression.The probable reason for the reduction of flow stress is that the inner damage and the heat softening of composites play a key role in the dynamic behavior of SiCp/2024Al composites at higher strain rates.Moreover,the configurations of SiC particles have dominate influence on the dynamical behavior of SiCp/2024Al composites. In particular,in cases of smaller strain (less than 0.62), the angular particles have better strengthening effect than those of circle particles,however,in contrast,the strengthening effect of circle particles is more remarkable.关键词
金属基复合材料/微观结构/有限元方法/动态力学性能Key words
metallic composites/microstructure/finite element method/dynamic behavior分类
航空航天引用本文复制引用
原梅妮,杨延清,弓巧娟,李超,郎贤忠,范学领..SiCp／2024Al 复合材料微观结构建模及动态力学性能评估[J].固体火箭技术,2014,(4):541-544,4.基金项目
FoundationNatural Science of China （51201155）；Natural Science of Shanxi Province （2012011019-1，2012011007-1）；Chinese Ed-ucation Ministry Foundation for Doctors （20101420120006）． （）
