Author(s): GU Xin, ZHANG Qing, HUANG Dan, College of Mechanics and Materials, Hohai University
Pages: 52-58
Year: 2016 Issue:  6
Journal: Journal of Vibration and Shock
Keyword:  concrete slab; rigid impact; peridynamics; modified PMB model; nonlocal model; cracking pattern;
Abstract: Peridynamics uses uniform spatial-integral and time-differential equations to describe materials and structures in both continuous and discontinuous areas. It is a nonlocal extension of continuum mechanics and a new meshfree numerical method. The pairwise constitutive function widely used in PMB model was modified,and an algorithm for impact contact between rigid projectile and deformable body was proposed. The peridynamic method was validated through the deformation of a simply supported beam and the well-known Kalthoff-Winkler experiment. Furthermore,concrete slabs subjected to rigid projectile impact were simulated. The simulation results reveal explicitly the final failure patterns of concrete slabs and the whole process of concrete failure from the damage accumulation to the final failure. The numerical simulations illustrate that the modified peridynamic model is reasonable and reliable,and peridynamics is an effective method in simulating the impact problems of concrete structures.