摘要
利用材料微观组织结构仿真软件ProDesign生成的颗粒增强复合材料微结构样本,包含大量的Voronoi晶粒与椭球颗粒,被用于模拟真实的复合材料微结构,以研究各向异性与局域性对复合材料微结构力学性能的影响。通过对商业有限元软件ABAQUS的二次开发实现对颗粒增强复合材料微结构细观应力的数值计算。计算机模拟试验证实,增强相颗粒与基体材料的刚度不匹配以及材料微结构组成物取向的局部各向异性,对复合材料结构弱点的分布具有决定性的作用。同时,该计算试验结果对于评估微裂纹的启裂、扩展,预测复合材料微结构材料损伤后的材料性能,推演微结构'虚拟失效行为'亦具有十分重要的意义。
Samples of particle reinforced composite microstructures generated by material microstructure simulation software ProDesign,including a large number of Voronoi grains and ellipsoidal particles,are used to simulate real-composite material microstructures,to study the influence of anisotropy and locality on mechanical properties of the composite microstructures.Micro-stress numerical calculation of particle reinforced composite microstructures is achieved by secondary development of the commercial finite element software ABAQUS,and computer simulation experiments confirm that the mismatching of stiffness of the particles and the matrix material,and local anisotropy of the orientation of microstructure components,play a decisive role in the distribution of the composite material structural weaknesses.On the basis of the results,the numerical response of micromechanics of microstructure achieved by finite-element method is of great significance to identify ＂material structure weakness＂,evaluate initiation and propagation of microcracks of microstructures for heterogeneous materials,predict material performance after material microstructure damaging,deduce the ＂virtual failure behavior＂ of microstructure.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2010年第4期35-41,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(50271016
50571042)
关键词
材料微结构
数值模拟
材料结构弱点
虚拟失效
各向异性
Material microstructure Numerical simulation Material structure weakness Virtual failure Anisotropy
