Monte Carlo Simulation on the Matrix Failure Considering the Interfacial Debonding Energy

Abstract

Considering the interfacial debonding energy at the fiber/matrix interface, an improved Monte Carlo simulation has been done on the matrix failure of the unidirectional ceramic matrix composites. Firstly, the debond length formula was given, then the stress/strain formula was also reviewed, and the matrix failure was simulated by the improved Monte Carlo model, the effect of the interfacial debonding stress on the matrix cracks evolution and the stress/strain curve was considered especially. Lastly, the result was compared to the experiment data. The result shows that the larger interfacial debonding energy at the fiber/matrix interface, the larger debond stress, the crack density increase more slowly, the mean crack density smaller, the final failure strength lower. The improved Monte Carlo simulation result is agreed well with the experiment data.