Peridynamic modeling and simulations on concrete dynamic failure and penetration subjected to impact loadings

Abstract

In this paper, we simulate the dynamic fracture and failure of three-dimensional concrete structures using the peridynamic theory. Considering the heterogeneities and mesoscopic characteristics of concrete material, the dynamic failure of concrete is investigated by employing an intermediately homogenized peridynamic (IH-PD) model, in which information from the composition at the mesoscale is linked to the macroscale fracture behavior, and cement mortar, aggregates, and interfacial transition zone (ITZ) are taken into account. Moreover, a plastic constitutive model under the framework of peridynamics, taking the effect of volume change and hydrostatic pressure on the concrete mechanical behavior into account, is formulated to depict the complex dynamic mechanical response of concrete under the high-velocity impact. Several typical numerical examples, including elastic wave propagation in a concrete plate, fracture in a notched concrete beam, and penetration of concrete targets subjected to high-velocity impacting are investigated. The numerical results are compared with corresponding experimental observations to validate the capabilities of the proposed model and approach. Further comparison with the fully-homogenized model shows the advantages of the present model on studying impact failure problems in concrete-like materials and structures.