Journal article
Mesoscale simulation of reactive pressed energetic materials under shock loading
Journal of applied physics, Vol.118(24), p.245905
12/28/2015
DOI: 10.1063/1.4938581
Abstract
Shock load analysis of two different samples of pressed HMX energetic material is performed using the Eulerian compressible multimaterial code SCIMITAR3D. The numerical framework uses an image to computation approach to perform shock analysis on real microstructures of the energetic samples. Image processing algorithms are applied on SEM images of both samples to implicitly represent the microstructures using level set functions. The chemical decomposition of HMX is modeled using the Henson-Smilowitz multi-step kinetic mechanism. It is observed that microstructural characteristics play a crucial role in determining the ignition behavior of the energetic materials. For the applied shock loads and for the particular samples investigated, class III sample leads to initiation of chemical reaction and the class V sample does not ignite. It is also shown that the orientation of elongated voids with respect to incident shock load is an important factor contributing to the initiation of chemical reactions in the class III sample. This is explained by performing numerical experiments of elongated void oriented at different angles with respect to the shock load. Results show the importance of microstructural details, such as void size, distribution, and orientation for initiation.
Details
- Title: Subtitle
- Mesoscale simulation of reactive pressed energetic materials under shock loading
- Creators
- Nirmal K Rai - Mechanical and Industrial Engineering, The University of Iowa, Iowa City, Iowa 52242, USAH. S Udaykumar - Mechanical and Industrial Engineering, The University of Iowa, Iowa City, Iowa 52242, USA
- Resource Type
- Journal article
- Publication Details
- Journal of applied physics, Vol.118(24), p.245905
- DOI
- 10.1063/1.4938581
- ISSN
- 0021-8979
- eISSN
- 1089-7550
- Grant note
- DOI: 10.13039/100006602, name: Air Force Research Laboratory
- Language
- English
- Date published
- 12/28/2015
- Academic Unit
- IIHR--Hydroscience and Engineering; Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984121863902771
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