宇航材料工艺2017，Vol.47Issue(2)：18-24,7.DOI:10.12044/j.issn.1007-2330.2017.02.005
单向C/SiC复合材料热残余应力数值模拟研究
Numerical Simulation of Thermal Residual Stresses For Unidirectional C/SiC Composites
摘要
Abstract
During the preparation of continuous fiber-reinforced ceramic materials,the mismatch of linear expansion coefficient between the fiber and matrix may induce thermal residual stresses,which will result in fiber debonding and matrix cracking ultimately.And furthermore,it will have a significant influence on macro-mechanical properties.Based on the unidirectional C/SiC composites,this paper set a unit cell model of “fiber-interface-matrix” to predict the distribution rules of thermal residual stresses by micromechanics method.With ABAQUS software,the numerical simulation research on the preparation of C/SiC composites was developed,which revealed the influence rules of the interface thickness,fiber volume fraction and preparation temperature to the thermal residual stresses of the composites.And the effects of thermal residual stresses on mechanical properties of composites were also analyzed.The result is expected to provide a useful guideline for the design,evaluation and optimal application of C/SiC.关键词
C/SiC复合材料/单胞模型/热残余应力/数值模拟/内聚力模型Key words
C/SiC composites/Unit cell model/Thermal residual stresses/Numerical simulation/Cohesive zone model分类
通用工业技术引用本文复制引用
曹德胜,任成祖,张立峰,李远辰,李巾锭..单向C/SiC复合材料热残余应力数值模拟研究[J].宇航材料工艺,2017,47(2):18-24,7.基金项目
国家自然科学基金资助项目(51275346),教育部博士点基金资助项目(20110032110007) （51275346）
