稀疏颗粒增强镍基复合材料的应力场及损伤分析  

Stress field and damage evolution analysis of the sparse particle reinforced composite

作　　者：姚战军[1] 郑坚[1] 倪新华[1] 

机构地区：[1]石家庄军械工程学院火炮工程系,河北石家庄050003

出　　处：《兵器材料科学与工程》2007年第2期23-27,共5页Ordnance Material Science and Engineering

摘　　要：陶瓷颗粒增强镍基合金复合材料是一种性能优良的复合材料,它能够将增强相和基体的性能相结合。应用细观力学和有限元理论将复合材料简化为含两个陶瓷颗粒的单胞,对材料单向拉伸下的应力场进行模拟,分析其应力的分布情况和复合材料的性能特征。结果表明,单胞中的应力是不均匀的,高刚度颗粒的界面附近应力最大并将首先破坏。最后利用单元消去技术模拟材料开裂情况下的应力场变化及裂纹扩展路径。研究对于理论分析和实验具有一定的参考和指导作用。The ceramic particle reinforced nickel matrix composite is one kind of material which combines the properties of the reinforced phase and the matrix, so it has been widely used in the engineering. Composites were simplified as representative volume cell in the paper, and in order to study the interaction of the particles, each cell includes two ceramic particles. Then ANSYS was used to construct the cell model, simulate the tensile stress field, analyze the stress distribution and the material properties. The results show that the stress is uneven in the cell and the elements near the particles with high stiffness will damage first. At last the stress change and damage evolution route are simulated when the damage happens using the element birth and death technology. The work of the paper can be a reference of further experiment and theoretical analysis.

关 键 词：复合材料 MORI-TANAKA方法 损伤模量 有限元分析 单元生死 损伤演化 

分 类 号：O346[理学—固体力学]