短纤维增强金属基复合材料拉伸应力场的有限元数值分析  

FINITE ELEMENT NUMERICAL ANALYSIS OF TENSILE STRESS FIELD IN SHORT FIBER REINFORCED METAL MATRIX COMPOSITE

作　　者：丁向东[1] 连建设[1] 江中浩[1] 胡平[2] 

机构地区：[1]吉林工业大学材料科学与工程学院,长春130025 [2]吉林工业大学计算中心,长春130025

出　　处：《金属学报》2000年第2期196-200,共5页Acta Metallurgica Sinica

基　　金：国家杰出青年基金!59625102

摘　　要：运用空间轴对称弹塑性有限元方法，研究了短纤维增强金属基复合材料拉伸应力场分布．研究表明，基体和纤维的应力分布 及基体塑性行为具有明显的不均匀性，材料参数（纤维长径比、纤维体积分数、纤维根间距和基体应变硬化指数）以不同方式通过影响应 力传递、基体约束变形和基体应变硬化进而影响应力场分布。The tensile stress field distribution in short fiber reinforced metal matrix composite was investigated by using the large strain two-dimension axisymmetric elastoplastic finite element method. It was shown that the stress distributions in the matrix and fiber as well as the plastic behavior of the matrix are of significant non-homogeneity. The material parameters (fiber volume fraction, fiber aspect ratio, fiber end distance and matrix strain hardening coefficient) affect the stress field distribution in different ways through their influence on the stress transfer, the constrained matrix deformation and matrix strain hardening.

关 键 词：金属基 复合材料 有限元 数值分析 应力分布 

分 类 号：TB333[一般工业技术—材料科学与工程]