Damage and Failure Analysis of Fiber-Reinforced Ceramic-Matrix Composites with Different Fiber Preforms Under Stochastic Fatigue Load Spectrum

Prediction of fatigue limit stress in C/SiC composites: Effect of stochastic load spectrum

“…During operation of CMCs hot‐section components, stochastic overloads may occur during cyclic‐fatigue loading 30,31 . In the present analysis, three typical stochastic loading spectrums (as shown in Figure 1) were considered in the FLS analysis, as follows: Under cyclic fatigue loading at peak stress σ p , the constant stochastic stress σ s occurs at cycle number N 1 , N 2 , and N 3 with cyclic duration Δ N . Under cyclic fatigue loading at peak stress σ p , the increasing stochastic stresses σ s1 , σ s2 , and σ s3 occur at cycle number N 1 , N 2 , and N 3 with cyclic duration Δ N . Under cyclic fatigue loading at peak stress σ p , the decreasing stochastic stress σ s1 , σ s2 , and σ s3 occur at cycle number N 1 , N 2 , and N 3 with cyclic duration Δ N . …”

“…During operation of CMCs hot-section components, stochastic overloads may occur during cyclic-fatigue loading. 30,31 In the present analysis, three typical stochastic loading spectrums (as shown in Figure 1) were considered in the FLS analysis, as follows:…”