Numerical simulation of progressive debonding in fiber reinforced composite under transverse loading

The finite element model of progressive debonding in fiber reinforced composite is developed based on the cohesive-zone model of interface. An interface crack nucleation, onset and growth have been studied in detail for a single fiber and comparison is made with the linear fracture mechanics model. Then, the effect on debonding progress of local stress redistribution due to interaction between the fibers was studied in the framework of two-inclusion model. Simulation of progressive debonding in fiber reinforced composite using the many-fiber models of composite has been performed. It has been shown that the developed model provides detailed analysis of the progressive debonding phenomenon including the interface crack cluster formation, overall stiffness reduction and induced anisotropy of the effective elastic moduli of composite.