Abstract
This study investigates the synergistic effect of interface wear and loading sequence on interface debonding and relative slipping of fiber-reinforced ceramic-matrix composites (CMCs). There are five different fatigue loading sequences considered in the present analysis. Based on the fatigue damage mechanism of fiber slipping relative to the matrix upon unloading/reloading, the interface debonded length and interface slip lengths are determined using the fracture mechanics approach. The relationships between interface debonding, interface slipping, interface wear, cycle number, peak stress and loading sequence have been determined. The fatigue hysteresis loops of C/SiC composite under three-stage cyclic fatigue loading have been predicted using the present analysis.
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