Modeling thermally driven energetic response of high explosives in ALE3D

摘要

The authors have improved their ability to model the response of energetic211u001ematerials to thermal stimuli and the processes involved in the energetic 211u001eresponse. Traditionally, the analyses of energetic materials have involved 211u001ecoupled thermal transport/chemical reaction codes. This provides only a 211u001ereasonable estimate of the time and location of ensuing rapid reaction. To 211u001epredict the violence of the reaction, the mechanical motion must be included in 211u001ethe wide range of time scales associated with the thermal hazard. The ALE3D code 211u001ehas been modified to assess the hazards associated with heating energetic 211u001ematerials in weapons by coupling to thermal transport model and chemistry models. 211u001eThey have developed an implicit time step option to efficiently and accurately 211u001ecompute the hours of heating to reaction of the energetic material. Since, on 211u001ethese longer time scales materials can be expected to have significant motion, it 211u001eis even more important to provide high-order advection for all components, 211u001eincluding the chemical species. They show two examples of coupled 211u001ethermal/mechanical/chemical models of energetic materials in thermal 211u001eenvironments.