Quasimolecular dynamic simulation for bending fracture of laminar composite materials

Recently, quasimolecular dynamics has been successfully used to simulate the deformation characteristics of actual size solid materials. According to quasimolecular dynamics, which is an attempt to bridge the gap between atomistic simulation and continuum simulation, molecules are aggregated into large units, called quasimoleculae, to evaluate large scale material behavior. In this paper, a 2-dimensional numerical simulation using quasimolecular dynamics is performed to investigate laminar composite material fractures and crack propagation behavior in the uniform bending of laminar composite materials. It has been verified that under bending deformation the laminar composite materials deform quite differently from the homogeneous materials. According to the position of the hard material in the composite material under bending deformation, the magnitude of the bending angle that initiates the fracture of the crack tip varies significantly. The reason for this may be attributed to the movement of the neutral line of the composite specimen.