2D编织陶瓷基复合材料应力-应变行为:分析预测  

STRESS-STRAIN BEHAVIOR IN 2D WEAVE CERAMIC MATRIX COMPOSITE:ANALYSIS PREDICTIONS

作　　者：陶永强[1] 矫桂琼[1] 王波[1] 常岩军[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,西安710072

出　　处：《工程力学》2009年第10期221-227,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(90405015);高等学校博士学科点专项科研基金项目(20030699040)

摘　　要：将2D编织结构简化为0o/90o正交铺层结构,在单轴拉伸载荷作用下,通过含渐进损伤的简化剪滞理论,得到了正交铺层结构中各层的应力分布及90o层裂纹密度与施加应力之间的变化关系;基于随机的基体裂纹演化理论和随机的纤维损伤和最终失效理论,得到了正交铺层中0o层在拉伸载荷作用下的应力-应变关系,进而得到了0o层的切线拉伸模量与作用于0o层的拉伸应力之间的变化关系,将0o层的切线拉伸模量代入正交铺层结构的简化剪滞分析中,从而得到2D编织陶瓷基复合材料的拉伸应力-应变关系,理论模拟结果与试验结果吻合良好。2D weave structure is simplified as crossply composite laminate. A simplified shear lag analysis using a progressive scheme is proposed for crossply structure under monotonic tensile loading conditions. Closed form solution for stress distribution and traverse crack density of damaged plies as well as the entire laminate can be obtained as a function of the applied load. Based on stochastic matrix crack evolution, according to theory of stochastic fiber damage and ultimate failure, this paper obtained stress-strain behavior and tangent tensile modulus related to the applied load of the 0° ply in crossply structure. Substituting tangent tensile modulus into the simplified shear lag analysis of crossply composite laminate, the stress-strain curve in 2D weave ceramic matrix composite is obtained and is in good agreement with experimental results.

关 键 词：复合材料 应力-应变行为 二维编织 C/SIC 剪滞分析 

分 类 号：TB332[一般工业技术—材料科学与工程]