Abstract
In this paper, damage process caused by shear cutting in CFRP laminates was characterized by experiments and numerical simulations based on the smoothed particle hydrodynamics (SPH). Unidirectional laminates were cut by using a shear cutting jig, and the damage states and cutting forces were characterized with respected to the clearance, which was a distance between upper tool and lower tool. Shear cutting process was then analyzed based on SPH. Two types of model, i.e., homogeneous model and heterogeneous model were employed to represent a unidirectional laminates. In the homogeneous model, various types of damages including fiber failure and transverse cracks were predicted. Based on the heterogeneous model that divided into fibers and resin, fiber failure and matrix failure were predicted, and the damage state and the cut pattern were similar to those of the homogeneous model. By the comparison with experiments and simulations, we evaluated the damage extension process caused by shear cutting in CFRP unidirectional laminates.
