Probabilistic Assessment of Matrix Crack Size and Density in Composite Structures

A comprehensive life estimation methodology is developed simulating non-linear structural degradation of composites such as polymer matrix composite (PMC) and ceramic matrix composite (CMC) materials. The methodology predicts the evolution of cracking and probability of failure under any thermo-mechanical loading environment. Hierarchical progressive failure analysis (HPFA) methodology and associated software is developed capable of predicting accurate life of structures under deterministic and random loading environments, and is enhanced to quantify the crack density in composite structures under thermal and mechanical loads.