Fatigue performance analysis of SiCf/Ti composites under spectrum load

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.

Automated summary

This study investigated the fatigue mechanical properties of SiCf/Ti composites under a spectrum load and performed a fatigue test on SiCf/Ti composites under spectrum load, followed by analyzing the failure mechanism. The evolution of typical damage modes, including fiber breakage, matrix cracking, and interface wear, with the number of spectrum load cycles was studied by establishing a fatigue damage model for each type of damage under spectrum load. The fatigue hysteresis loop, residual stiffness, and residual strength were simulated and compared with practical experiments using the combination of the meso-mechanical model and fatigue damage model.