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

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.