Multi-scale modeling of shock initiation of a pressed energetic material. II. Effect of void–void interactions on energy localization

Heterogeneous energetic materials (EMs) contain microstructural defects such as voids, cracks, interfaces, and delaminated zones. Under shock loading, these offer potential sites for energy localization, i.e., hotspot formation. In a porous EM, the collapse of one void can generate propagating blast waves hotspots that influence phenomena at neighboring voids. Such void–void interactions must be accounted in predictive multi-scale models reactive response EM. To infuse meso-scale into framework, meso-informed ignition growth model (MES-IG) has been developed, where is incorporated overall reaction rate through function, fv−v. Previously, MES-IG was applied to predict sensitivity fv−v assumed function sample porosity alone. This paper performs deeper analysis strong dependency on other factors, size strength. The improved produces good agreement with direct numerical simulations HE microstructures and, thus, advances capability