CAJ | 학술논문

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.
이용재료미관조직결구방진연건ProDesign생성적과립증강복합재료미결구양본,포함대량적Voronoi정립여타구과립,피용우모의진실적복합재료미결구,이연구각향이성여국역성대복합재료미결구역학성능적영향.통과대상업유한원연건ABAQUS적이차개발실현대과립증강복합재료미결구세관응력적수치계산.계산궤모의시험증실,증강상과립여기체재료적강도불필배이급재료미결구조성물취향적국부각향이성,대복합재료결구약점적분포구유결정성적작용.동시,해계산시험결과대우평고미렬문적계렬、확전,예측복합재료미결구재료손상후적재료성능,추연미결구"허의실효행위"역구유십분중요적의의.
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.