A Multiscale Simulation Framework to Model Energetic Materials Subjected to Shock Loading

ABSTRACT: The overall objective of this project is to develop scalable simulation components that effectively model the meso-scale physics of heterogeneous energetic materials subject to dynamic shock loading including matrix debonding, void collapse, and damage due to crystal to crystal interactions, and bridges the meso-scale to the macro-scale for system scale simulations of the transition to detonation. Specific technical developments required to accomplish this include: Geometry construction and meshing of meso-scale structures with the capability of updating for evolving geometries and mesh adaptivity to handle debonding and fracture. Appropriate models of the physical processes including models of material and interface behavior under shock conditions. Procedures for accurate, efficient, and scalable thermal-mechanical simulations of the meso-scale behavior built on robust finite element software. ; BENEFIT: By developing the simulation tool as a set of functional components that interact through well defined interfaces there will be the opportunity to apply them to a wide range problems characterized by evolving meso-scale structures which is at the core of a wide range of material design problems. In addition a number of the components developed will be applicable to other areas of application in which careful tracking of meso-scale structures are important such as biological systems.