Simulation on delamination of 90/0 laminate under low-velocity impact load by surface-based cohesive behavior contact in explicit analysis

In this paper, surface-based cohesive behavior contact with the friction behavior taken into consideration is adopted to simulate the delamination of the [903/03]S laminate under low-velocity impact. To guarantee the effectiveness of this contact on characterizing the friction behavior, the shear behavior of the cohesive contact under compressive stress is simulated, and the result shows that the cohesive contact is able to characterize the cohesive behavior with friction. Besides, the Puck's failure criterion, good at simulating the matrix dominating failure, is adopted and implemented by the subroutine VUSDFLD in the ABAQUS. Moreover, the plastic behavior of the laminate under in-plane shear stress is considered to study the effect of plasticity on the delamination. The delamination of the laminate under low-velocity impact is simulated firstly. The shape and the area of delamination simulated by the FEM are similar with the experiment, which proves the effectiveness of the cohesive contact on characterizing the real behavior of the interlaminar. Besides, the effect of the friction coefficient and the plastic behavior on the delamination are studied, and the results show that both of them have a significant effect on the delamination.