Yang, XingziLin, LiqiangWilkerson, JustinZeng, Xiaowei2021-08-262021-08-262021-08-10Journal of Composites Science 5 (8): 210 (2021)https://hdl.handle.net/20.500.12588/671The sensitivity of polymer-bonded explosives (PBXs) can be tuned through adjusting binder material and its volume fraction, crystal composition and morphology. To obtain a better understanding of the correlation between grain-level failure and hot-spot generation in this kind of energetic composites as they undergo mechanical and thermal processes subsequent to impact, a recently developed interfacial cohesive zone model (ICZM) was used to study the dynamic response of polymer-bonded explosives. The ICZM can capture the contributions of deformation and fracture of the binder phase as well as interfacial debonding and subsequent friction on hot-spot generation. In this study, a two-dimensional (2D) finite element (FE) computational model of energetic composite was developed. The proposed computational model has been applied to simulate hot-spot generation in polymer-bonded explosives with different grain volume fraction under dynamic loading. Our simulation showed that the increase of binder phase material volume fraction will decrease the local heat generation, resulting in a lower temperature in the specimen.Attribution 4.0 United Stateshttps://creativecommons.org/licenses/by/4.0/polymer-bonded explosive compositeinterfacial zone modelfinite element simulationcrack propagationhot-spot generationArticle2021-08-26