Fracture angle prediction for matrix failure of carbon-fiber-reinforced polymer using energy method

In this study, an energy-based model for predicting the fracture angle of matrix failure in unidirectional carbon-fiber-reinforced polymer (CFRP) under three-dimensional mechanical loading was developed. The elastic stresses in the undamaged area and the frictional stresses in the damaged area were considered in determining the complementary free energy density in the CFRP damage process. The fracture angle of the transverse matrix failure was...