Synergistic effect of arbitrary loading sequence and interface wear on the fatigue hysteresis loops of carbon fiber-reinforced ceramic-matrix composites

This study investigates the synergistic effect of arbitrary loading sequence and interface wear on the fatigue hysteresis loops of fiber-reinforced ceramic-matrix composites (CMCs). Based on the fatigue damage mechanism of fiber slipping relative to matrix in the interface debonded region, the interface debonded length, unloading interface counter-slip length and reloading interface new-slip length are determined by fracture mechanics approach. The effects of peak stress, material properties, interface wear and arbitrary loading stress levels on the interface slip and fatigue hysteresis loops have been analyzed.