Peridynamic(PD)theory has been proven to be of advantages in low-velocity impact modeling of composite laminate.Based on ordinary state-based PD composite spherical-horizon model,energy-based failure criteria was established,which considered mixed-mode fracture in each time step.PD modeling of composite laminate under low-velocity impact was conducted using the established energy-based criteria.Firstly,the model-ing stiffness was validated.PD modeling impact load,impact velocity and impact displacement agree well with finite element method(FEM)results.Then,PD damage modeling of composite laminate under low-velocity impact was conducted,and the fiber breakage,matrix crack and delamination damage process were illustrated.Compared with test results,PD modeling delamination area and shape are in good accordance,which validates the conducted PD modeling of composite laminate under low-velocity impact using energy-based criteria.
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