陶瓷基复合材料高精度宏细观统一本构模型研究

高希光; 宋迎东; 孙志刚

陶瓷基复合材料高精度宏细观统一本构模型研究

南京航空航天大学能源与动力学院, 南京 210016

基金项目: 航空科学基金(05C52013);973项目

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- 被引次数: 0
出版历程
- 收稿日期: 2007-09-06
- 修回日期: 2007-11-23
- 刊出日期: 2008-09-28

Multi-scale constitute model for ceramic matrix composite by high fidelity generalized method of cell

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

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.
- 陶瓷基复合材料 /
- 本构模型 /
- 多尺度分析 /
- 损伤
Abstract: Amulti-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 HFGMCmodel 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.
- ceramic matrix composites /
- constitutive model /
- multi-scale analysis /
- damage

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