标题：A 3D Cohesive Element Model for Fracture Behavior Analysis of Ceramic Tool Materials Microstmcture
作者：Haibin Yu;Chuanzhen Huang;Hanlian Liu
作者机构：Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061, P
来源：Materials Science Forum
关键词：Ceramic Tool Material;Fracture Behavior;Microstructure;3D Cohesive Element;3D Voronoi Tessellation
摘要：A 3D finite element polycrystalline microstmcture model of ceramic tool materials is presented. Quasi-static crack propagation is modeled using the cohesive finite element method (CFEM) and the microstructure is represented by 3D Voronoi tessellation. The influences of cohesive parameters, the ratios of maximum traction of grain boundary to maximum traction of grain on the crack patterns of Al_2O_3 have been discussed. This study has demonstrated the capability of modeling 3D crack propagation of ceramic microstructure with CFEM and Voronoi tessellation model. It is found that the fracture mode is changed from intergranular to transgranular as the maximum traction of grain boundary is increased.