颗粒增强复合材料有效模量的Voronoi单元有限元法分析

发布时间：2018-03-24 19:17

本文选题：颗粒增强复合材料　切入点：Voronoi单元有限元法　出处：《重庆大学学报》2016年05期

【摘要】：Voronoi单元有限元法在计算多相复合材料时比普通位移有限元法效率高,并且能够反映夹杂分布的随机性。用考虑界面脱层的Voronoi单元有限元法对代表性体积单元进行模拟得到应力场,再用直接均匀化方法进行平均,得到能够反映界面脱层对材料有效性能影响的平均应力—应变曲线和有效弹性模量。利用编写的可以对含任意夹杂代表性体积单元进行大规模计算的程序,对多个模型进行了数值模拟,分析了夹杂的形状、体积分数、空间分布等因素对材料有效弹性模量的影响,结果表明:具有较大有效弹性模量的模型一般在界面处有较大的应力集中,在加载过程中较早发生界面脱层。
[Abstract]:Voronoi element finite element method is more efficient than conventional displacement finite element method in calculating multiphase composite materials. Voronoi element finite element method considering interface delamination is used to simulate the stress field of the representative volumetric element, and then the direct homogenization method is used to average the stress field. The average stress-strain curve and effective elastic modulus, which can reflect the effect of interfacial delamination on the effective energy of the material, are obtained. The program can be used to calculate the representative volume element containing arbitrary inclusions on a large scale. Several models are numerically simulated, and the influence of the shape, volume fraction and space distribution of inclusions on the effective elastic modulus of the material is analyzed. The results show that the models with large effective modulus of elasticity generally have greater stress concentration at the interface, and the interfacial delamination occurs earlier in the loading process.
【作者单位】：昆明理工大学建筑工程学院;
【基金】：国家自然科学基金资助项目(KKGD201206020,KKGA201506009)~~
【分类号】：TB33

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