基于离散损伤模型的复合材料双悬臂梁分层疲劳扩展分析

Fatigue delamination analysis of composite double cantilever beams based on discrete damage zone model

摘要: 基于扩展逐层理论(Extended layerwise method，XLWM)、离散损伤模型(Discrete damage zone model，DDZM)和Peerlings损伤定律，建立了可以分析复合材料结构分层损伤疲劳扩展的疲劳渐进扩展逐层方法(Fatigue progressive extended layerwise method，FPXLWM)。首先对HTC/6736A碳纤维双悬臂梁进行分析，施加恒定弯矩，验证该方法的正确性；然后通过计算多组Paris曲线，确定模型的疲劳参数，对HTC/6736A碳纤维双悬臂梁分层疲劳扩展机制进行深入探讨。

Abstract: Based on extended layerwise method (XLWM), discrete damage zone model (DDZM) and Peerlings damage law, a fatigue progressive extended layerwise method (FPXLWM) was established to analyze the delamination fatigue growth of composites. Firstly, a HTC/6736A carbon fiber double cantilever beam subjected to a constant bending moment was analyzed to verify the proposed method in numerical examples. Then, the fatigue parameters of the proposed model were determined by several groups of Paris curves; the fatigue growth mechanisms of delamination in the HTC/6736A carbon fiber double cantilever beam were investigated.