摘要
基于高精度通用单胞模型(HFGMC)建立了陶瓷基复合材料(CMCs)的宏细观统一本构模型.首先基于CMCs的细观结构和损伤特点建立代表体元(RVE)并定义细观损伤变量.然后采用HFGMC模型计算细观损伤变量的演化,由此获得宏观应力应变曲线,从而建立了CMCs的宏细观统一本构模型.采用该本构模型预测了CMCs的宏观应力应变曲线,与实验结果吻合良好.结果表明该本构模型能够模拟CMCs的拉伸与损伤行文,为CMCs强度分析提供了有效手段.
A multi-scale constitute model for ceramic matrix composite （CMCs） was presented in this paper by using high-fidelity generalized method of cell （HFGMC）. Based on the microstructure and damage characteristics of CMCs, a representation volume element （RVE） and damage variables were defined. Then, the evolution of damage variables was calculated by HFGMC model to obtain the relationship between global stress and global strain. The numerical example shows that the result predicted by the model is consistent with the experimental result, and the model could simulate the global performance and the damage evolvement of CMCs exactly, thus providing an effective method for the micro-macro analysis of CMCs.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2008年第9期1617-1622,共6页
Journal of Aerospace Power
基金
航空科学基金(05C52013)
973项目
关键词
陶瓷基复合材料
本构模型
多尺度分析
损伤
ceramic matrix composites
constitutive model
multi-scale analysis
damage
作者简介
高希光（1981-），男，福建沙县人，博士生，主要从事航空宇航推进系统结构．强度与振动的研究．
