The Dynamic Mechanical Behaviour and the Statistical Crack Mechanics Model for a Polymer-bonded Explosive

摘要

Polymer-bonded explosives (PBXs) are widely used in various engineering applications. Thus, the safety of PBXs has received much attention. In this study, dynamic experiments on a typical PBX were conducted and the mechanical behaviour was studied. Based on the statistical crack mechanics (SCRAM) model, two constitutive models, the Visco-SCRAM model and the Elastic-Plastic-SCRAM model, were developed. Finite element simulations have also been carried out by applying the Visco-SCRAM model and the Elastic-Plastic-SCRAM model in the simulations and good agreement was found between the simulation results and the experimental results. It is suggested that the Elastic-Plastic-SCRAM model can be used for simulating the dynamic behaviour of PBXs under high strain rate conditions.