Multiscale Modeling for Thermomenchanical Fatigue Damage Analysis and Life Prediction for Woven Ceramic Matrix Composites at Elevated Temperature

Woven ceramic matrix composites (CMCs), exhibiting excellent thermomechanical properties at high temperatures, are promising as alternative materials to the conventional nickel-based superalloys in hot section components of aero-engines. Therefore, understanding and predicting lifetime CMCs is critical. Fatigue prediction woven currently involves long-term costly testing. A feasible use predictive modelling based on a deep damage mechanisms. this study develops multiscale analysis method for fatigue life CMC temperature by investigating evolution. To represent global composite structure, repeat unit cell (RUC) proposed. The RUC integrates micromechanics model shear-lag with statistical predict evolution structures. present methodology defines structure failure degradation caused constituent failures nonlinear material RUC. elastic modulus used determine failure, which can affect evaluated using experimental test performed SiC/SiC an environmental barrier coating.