Abstract
In this study, the fatigue mechanical properties of SiCf/Ti composites under a spectrum load were investigated, and a spectrum load fatigue test of SiCf/Ti composites was carried out, followed by an analysis of the failure mechanism. The evolution law of typical damage modes involving fiber breakage, matrix cracking, and interface wear with the number of spectrum load cycles was investigated with the establishment of a fatigue damage model for each damage under spectrum load. In the combination of the meso-mechanical model and fatigue damage model, the fatigue hysteresis loop, residual stiffness, and residual strength were simulated and compared with practical experiments.
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