NOSB定式Peridynamicsを用いた衝撃荷重下における積層構造の動的剥離シミュレーション

抄録

Composites structural failure usually involves a complex interplay of intralaminar and interlaminar damage. In this paper, we investigate the development of a particle-based, Non-Ordinary State-Based (NOSB) formulation of Peridynamics to predict the failure mechanism of carbon fiber composite laminates subjected to high-velocity impacts. In NOSB-peridynamics, the bonding energy set between particles can be introduced as a fracture parameter associated with the energy release rate. The accuracy of the NOSB-Peridynamics was verified for a simply supported beam, It was shown that the stress-displacement curves of the Peridynamics and the commercial FEM software were consistent. Furthermore, a dynamic delamination calculation of a laminated structure was performed using the NOSB-Peridynamics. The elastic wave which can induce delamination were suppressed by the viscous damping introduced to stabilize the Peridynamics simulation. It was found that the coefficients of the NOSB Peridynamics should be chosen appropriately to simulate the phenomenon correctly.