Bounding Surface Approach to the Modeling of Anisotropic Fatigue Damage in Woven Fabric Composites
Bounding Surface Approach to the Modeling of Anisotropic Fatigue Damage in Woven Fabric Composites
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机织物复合材料各向异性疲劳损伤建模的边界面法
DOI：
10.4236/ojcm.2012.24015
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M. Abdulrahman
中科院分区：
文献类型：
--
作者：
C. Wen;S. Yazdani;Y. J. Kim;M. Abdulrahman
本文概述了机织物复合材料在多轴应力状态下疲劳损伤建模的一般方法。以塑性力学和损伤力学的各向同性硬化/软化理论为指导，提出了一种广义边界面法。有人认为，极限表面只是一个特殊的情况下，在这样的配方时，疲劳循环被设置为一个和疲劳环境下的极限表面合同的失败（剩余强度）状态的基础上的循环次数，应力路径，和应力大小。在配方中，特定的动力学关系的微裂纹增长假设为机织织物复合材料和一个新的方向函数被指定捕获的材料的强度各向异性。各向异性刚度退化和非弹性应变传播由于损伤过程也得到利用损伤力学公式。本文的结论与比较理论预测实验记录显示出良好的一致性。
A general approach for the modeling of fatigue induced damage in woven fabric composites and under multi-axial stress state is outlined in this paper. Guided by isotropic hardening/softening theories of plasticity and damage mechanics, a generalized bounding surface approach is presented. It is argued that the limit surface is only a special case in such a formulation when the fatigue cycle is set to one and that under fatigue environment the limit surface contracts to a failure (residual strength) state based on the number of cycle, stress path, and stress magnitude. Within the formulation, specific kinetic relations for microcrack growth are postulated for woven fabric composites and a new direction function is specified to capture strength anisotropy of the material. Anisotropic stiffness degradations and inelastic strain propagation due to damage processes are also obtained utilizing damage mechanics formulation. The paper concludes with comparing theoretical predictions against experimental records showing a good agreement.