三维材料微结构设计与数值模拟  

3D material microstructures design and numerical simulation

作　　者：任淮辉[1] 李旭东[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《物理学报》2009年第6期4041-4052,共12页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50271016;50571042)资助的课题~~

摘　　要：为了研究材料细观尺度的力学性能与失效行为,达到对材料微结构的"性能导向型"设计与性能预测的目的,通过程序设计结合有限元数值模拟的方法实现多元多相异质体材料微观组织结构的计算机仿真、材料微结构的细观力学计算与虚拟失效分析.以材料微观组织结构计算机仿真软件ProDesign构造的多晶体材料与多晶体基复合材料微结构的代表性体积单元为基础,基于对商业有限元软件ABAQUS的二次开发,实现对材料微结构细观力学的数值计算,并根据数值模拟结果预测微结构的材料性能,识别"材料结构弱点",评估异质体材料微结构内微裂纹的启裂、扩展,推演材料微结构"虚拟失效行为".To study the micro-scale mechanical properties and failure behavior, and achieve the goal of ＂performance-oriented＂ design of microstructure and material performance prediction, in this study, computer simulation, micromeehanics calculation and virtual failure analysis on microstructures of polycrystalline materials with multi-component and muhiphase are realised by means of programming and finite element numerical simulation. Under the condition of creating representative volume element of microstructures of polycrystalline material and polycrystalline matrix composite that are constructed by material mierostrueture computer simulation software ProDesign, and based on the secondary development of the commercial finite element software ABAQUS, numerical calculation of micro-scale mechanics of microstruetures is implemented. The results of the numerical simulation can be used to predict material performance, identify ＂material structure weakness＂, evaluate initialization and propagation of microcracks of microstructures for heterogeneous materials and deduce the behavior of ＂virtual failure＂ of microstructure.

关 键 词：材料微结构 数值模拟 各向异性 虚拟失效 

分 类 号：TB303[一般工业技术—材料科学与工程]