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- W2162378516 abstract "An approach for the simulation of explosions of “energetic devices” is described. In this context, an energetic device is a metal container filled with a high explosive (HE). Examples include bombs, mines, rocket motors or containers used in storage and transport of HE material. Explosions may occur due to detonation or deflagration of the HE material, with initiation resulting from either mechanical or thermal input. This approach is applicable to a wide range of fluid–structure interaction scenarios, the application to energetic devices is chosen because it demonstrates the full capability of this methodology. Simulations of this type are characterized by a number of interesting and challenging behaviors. These include the transformation of the solid HE into highly pressurized gaseous products that initially occupy regions which formerly contained only solid material. This rapid pressurization of the container leads to large deformations at high strain rates and eventual case rupture. Once the container breaks apart, the highly pressurized product gas that escapes the failing container generates shock waves that propagate through the initially quiescent surrounding fluid. The approach, which uses a finite-volume, multi-material compressible CFD formulation, within which solid materials are represented using a particle method known as the Material Point Method, is described, including certain of the sub-grid models required to close the governing equations. Results are first presented for “rate stick” and “cylinder test” scenarios, each of which involves detonating unconfined and confined HE material, respectively. Experimental data are available for these configurations and as such they serve as validation tests. Finally, results from an unvalidated “fast cookoff” simulation in which the HE is initiated by thermal input, which causes deflagration, are shown." @default.
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- W2162378516 date "2007-06-01" @default.
- W2162378516 modified "2023-10-17" @default.
- W2162378516 title "An Eulerian–Lagrangian approach for simulating explosions of energetic devices" @default.
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- W2162378516 doi "https://doi.org/10.1016/j.compstruc.2007.01.031" @default.
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