Tensile residual strength prediction of composite laminate with lightning strike thermal-mechanical coupling damage

For the sake of predicting residual strength of composite laminate with lightning strike thermal-mechanical coupling damage, stiffness matrix progressive damage degradation model was constructed to characterize composite lightning strike thermal-mechanical coupling damage based on continuum damage mechanics (CDM) method and phenomenological analysis method. An three dimensional model of composite laminate structure with lightning strike thermal-mechanical coupling damage was established based on progressive damage model and ABAQUS finite element simulation software. Combined with UMAT subroutine, residual strength prediction was accomplished under tensile load. The results show that excellent agreement between test data and numerical results is observed. The model constructed in this paper is capable to predict the tensile residual strength of composite laminate with lightning strike thermal-mechanical coupling damage.