短纤维增强金属基复合材料微屈服行为的计算机模拟  

Computer Simulation of Microyield Behavior of Short Fiber Reinforced Metal Matrix Composites

作　　者：吴晶[1] 李文芳[1] 蒙继龙[1] 

机构地区：[1]华南理工大学机械工程学院,广东广州510641

出　　处：《材料科学与工程学报》2003年第3期364-367,共4页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目 (1 9972 0 2 1 )

摘　　要：本文采用细观力学模型 ,根据Eshelby等效夹杂原理和双夹杂模型等 ,用计算机模拟的方法定量计算了短纤维增强金属基复合材料微屈服行为规律。计算结果表明在基体材料的微屈服规律符合Brown Lukens线性规律的情况下 ,金属基复合材料的σ - <εp>1 2 也近似符合Brown Lukens规律。同时计算了增强体短纤维的含量、形状。The short fiber reinforced MMC'S microyield behavior is computed by micromechanics model based on the Eshelby's equivalent method and double-inclusion model,etc.The result shows that the MMC'S microyield behavior likewise accords with Brown-Luken's relation approximately if the matrix material abides by Brown-Luken's relation.The MMC'S microyield strength is lower than that of the matrix material.The influencing factors are studied quantitatively such as fiber volume fraction,fiber aspect ratio,density of dislocation on the process of MMC'S microyield.

关 键 词：短纤维增强金属基复合材料 微屈服行为 计算机模拟 细观力学 MMC 

分 类 号：TB333[一般工业技术—材料科学与工程] TB301