About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Comparison of Deflagration Modes in a Granular Energetic Material due to Spherical and Planar Impact |
Author(s) |
Meghana Sudarshan, Ayotomi Olokun, Abhijeet Dhiman, Vikas Tomar |
On-Site Speaker (Planned) |
Meghana Sudarshan |
Abstract Scope |
Energetic materials are used as solid rocket propellants and explosives in the aerospace industry. For safe transportation and storage of energetic materials, having a good understanding of mechanical and chemical understanding of materials helps prevent unintended initiations. The current understanding of deflagration modes lacks complete information on hotspot formation mechanisms regarding the nature of the impact. Studies on deflagration to detonation transition focus mainly on planar impact scenarios with detonation under shock. In this study, we compare the likeliness of deflagration with different geometries of the impactor. A cohesive finite element (CFEM) based computational framework is used to simulate the behavior of granular energetic materials with cyclotetramethylene-tetranitramine (HMX) embedded in hydroxyl-terminated polybutadiene binder with planar and spherical impactor profiles. Comparison of the likelihood of detonation is highlighted based stresses created around crystals in energetic on expanding pressure profile of spherical impactor and uniform pressure profile from a planar impact. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, |