Verification of Concrete Spalling Simulation with Wave Propagation Theory

It is well known that spalling failure occurs when concrete walls are subjected to impact loading. This is explained by the fact that the compressive stress wave generated by the impact propagates from the front surface to the back surface and is reflected at the back surface as a tensile stress wave that exceeds the tensile strength of the concrete. Spalling failure is one of the most important failure modes in evaluating the response of concrete structures subjected to impact loading. Ansys LS-DYNA has several capabilities to simulate spalling failure, but whether the depth from the surface where spalling occurs is accurately simulated is an important indicator for predicting the actual response of the structure with high accuracy. Therefore, in this study, the accuracy of the simulation of spalling failure using LS-DYNA was investigated based on the wave propagation theory. As a result, it was confirmed that LS-DYNA could reproduce the behavior of spalling failure with high accuracy.