A micromechanical tension-tension fatigue hysteresis loops model of fiber-reinforced ceramic-matrix composites considering stochastic matrix fragmentation

A micromechanical tension-tension fatigue hysteresis loops model of fiber-reinforced ceramic-matrix composites (CMCs) is developed considering synergistic effects of stochastic matrix fragmentation and interface debonding. Evolution of matrix fragmentation with applied stress is determined using a numerical method. Fatigue hysteresis loops models for long, medium and short matrix fragmentation are developed based on the interface damage mechanism. Experimental fatigue hysteresis loops of two different CMCs are predicted. With increasing fatigue peak stress, matrix fragmentation density increases, and residual and peak strain, hysteresis area and width increase. Effects of fiber volume and interfacial shear stress on fatigue hysteresis loops are also discussed.

Automated summary

A micromechanical tension-tension fatigue hysteresis loops model of fiber-reinforced ceramic-matrix composites (CMCs) is developed, considering synergistic effects of stochastic matrix fragmentation and interface debonding. Experimental fatigue hysteresis loops of two different CMCs are predicted based on the model, and the effects of fiber volume and interfacial shear stress on fatigue hysteresis loops are discussed.