TY - JOUR A2 - Silberschmidt, Vadim V. AU - Cheng, L. R. AU - Chen, R. AU - Shi, H. J. AU - Lu, F. Y. PY - 2014 DA - 2014/12/04 TI - The Pore Collapse “Hot-Spots” Model Coupled with Brittle Damage for Solid Explosives SP - 972414 VL - 2014 AB - This paper is devoted to the building of a numerical pore collapse model with “hot-spots” formation for the impacted damage explosives. According to damage mechanical evolution of brittle material, the one-dimensional elastic-viscoplastic collapse model was improved to incorporate the impact damage during the dynamic collapse of pores. The damage of explosives was studied using the statistical crack mechanics (SCRAM). The effects of the heat conduction and the chemical reaction were taken into account in the formation of “hot-spots.” To verify the improved model, numerical simulations were carried out for different pressure states and used to model a multiple-impact experiment. The results show that repeated weak impacts can lead to the collapse of pores and the “hot-spots” may occur due to the accumulation of internal defects accompanied by the softening of explosives. SN - 1070-9622 UR - https://doi.org/10.1155/2014/972414 DO - 10.1155/2014/972414 JF - Shock and Vibration PB - Hindawi Publishing Corporation KW - ER -