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中文摘要：
采用IOSIPESCU纯剪切试件，考虑纤维的编织结构和失效机理，研究了三维机织碳／碳化硅（C／SiC）复合材料在面内剪切载荷作用下的力学性能和损伤过程．材料具有明显的非线性应力-应变行为和残余变形等特性,材料主要的损伤机制为基体微裂纹开裂，界面脱粘和纤维断裂，其中界面裂纹是材料应力-应变等力学行为的主要影响因素．基于连续介质损伤力学分析方法，提出了简单的损伤演化模型并对损伤演化过程进行了描述．
英文摘要：
The mechanical behavior and damage process of a three-dimensional woven carbon/silicon carbide （C/SiC） composite under inoplane shear loading were investigated With IOSIPESCU specimens in relation with the failure mechanisms and the fiber architecture. The C/SiC composite exhibited several interesting features including an essentially non-linear stress-strain behavior and permanent deformations. The results show that the major damage mechanisms are matrix microcracks cracking, interface debonding and fiber breaking. The delamination cracks affect mainly the stress-strain behavior and the mechanical properties. A damage model is proposed based upon continuum damage mechanics to describe the damage evolution.
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