کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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240824 | 1427922 | 2013 | 9 صفحه PDF | دانلود رایگان |
The multi-material numerical simulation for energetic system that consists of a high explosive charge and an inert confinement is carried out with an accurate and state-of-the-art Eulerian method. An explosively driven copper tube results in a state of extreme temperature and pressure, coupled to a high speed structural response of metal due to a detonating high explosive (HE). We use the experimentally tuned Ignition and Growth (or JWL++) rate equation for the HE while the elasto-plastic response of inert is modeled by the Mie–Gruneisen equation of state (EOS) and the Johnson–Cook strength model. A new particle level-set based reactive Ghost Fluid Method (GFM) that imposes exact boundary conditions at the material’s interface according to physical restraints is developed to simulate the multi-material detonation problem. Our calculations reproduce the experimental data of both unconfined and confined rate stick problems, suggesting that the method is suitable for detonation simulation of energetic systems.
Journal: Proceedings of the Combustion Institute - Volume 34, Issue 2, 2013, Pages 2025–2033