Non-axisymmetric matrix cracking and interface debonding in unidirectional brittle matrix composites (Q1286049)

A discrete fiber model is developed and applied to study the problem of non-axisymmetric matrix cracking and interface debonding in unidirectional brittle-matrix fiber-reinforced composite materials subjected to an axial tensile load in the fiber direction. In this model, it is assumed that the interface debond remains open. Considering the non-axisymmetry of the matrix crack and interface debond, a three-dimensional stress analysis is introduced into the above model. The variational approach based on the principle of minimum potential energy is further employed to obtain numerical results for stress and displacement fields.