Product Overview:
This tutorial explores the SPH (Smoothed Particle Hydrodynamics) simulation of an explosion impacting a masonry wall using a micro-model in Abaqus, focusing on detailed damage analysis. The wall consists of three-dimensional concrete brick blocks and a concrete beam, while the explosive TNT is represented as a solid spherical part.

To accurately capture the concrete blocks’ response under intense, short-duration pressure, specific material models are used instead of CDP and Brittle Cracking. The TNT explosive employs the Jones-Wilkens-Lee (JWL) equation of state to model the pressure from the release of chemical energy. The JWL model functions as a “programmed burn,” meaning that detonation initiation is based on a geometric approach—using the detonation wave speed and the material point’s distance from the initiation location—rather than shock-triggered activation.

For this high-stress, fast-paced analysis, the Dynamic Explicit procedure is the best fit. The mortar between the blocks is defined as an interaction property that incorporates cohesive behavior, damage initiation, and evolution criteria.

Throughout the simulation, the TNT explosion creates substantial pressure, inflicting damage on the wall, and the requested wall damage parameters are successfully captured.