Experimental Study on Stepping Stress Stochastic Resonance Fatigue

The vibration fatigue is studied from the dynamics, and the resonance fatigue test is designed and completed in this paper. The resonance fatigue test is designed by analyzing the analytic solution of the differential equation of structural vibration response. Taking C/SiC material as the experimental object, the resonance fatigue life of different stress levels should be obtained by stepping from the applied excitation. The equation of the root mean square value and fatigue life of the stress response under resonance fatigue is the conclusion. Compared with the traditional S-N curve, the resonance fatigue failure life of the material is shorter.