Journal article
Multi-scale modeling of shock initiation of a pressed energetic material. II. Effect of void–void interactions on energy localization
Journal of applied physics, Vol.131(21), 215903
06/07/2022
DOI: 10.1063/5.0090225
Abstract
Heterogeneous energetic materials (EMs) contain microstructural defects such as voids, cracks, interfaces, and delaminated zones. Under shock loading, these defects offer potential sites for energy localization, i.e., hotspot formation. In a porous EM, the collapse of one void can generate propagating blast waves and hotspots that can influence the hotspot phenomena at neighboring voids. Such void-void interactions must be accounted for in predictive multi-scale models for the reactive response of a porous EM. To infuse such meso-scale phenomena into a multi-scale framework, a meso-informed ignition and growth model (MES-IG) has been developed, where the influence of void-void interactions is incorporated into the overall reaction rate through a function, f v - v. Previously, MES-IG was applied to predict the sensitivity and reactive response of EM, where f v - v was assumed to be a function of the overall sample porosity alone. This paper performs a deeper analysis to model the strong dependency of f v - v on other factors, such as void size and shock strength. The improved model for void-void interactions produces good agreement with direct numerical simulations of the HE microstructures and, thus, advances the predictive capability of multi-scale models of the shock response and sensitivity of EM.
Details
- Title: Subtitle
- Multi-scale modeling of shock initiation of a pressed energetic material. II. Effect of void–void interactions on energy localization
- Creators
- Yen T. Nguyen - University of IowaPradeep K. Seshadri - University of IowaOishik Sen - University of IowaDavid B. Hardin - Eglin Air Force BaseChristopher D. Molek - Eglin Air Force BaseH. S. Udaykumar - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of applied physics, Vol.131(21), 215903
- DOI
- 10.1063/5.0090225
- ISSN
- 0021-8979
- eISSN
- 1089-7550
- Number of pages
- 18
- Grant note
- FA8651-16-1-0005 / Air Force Research Laboratory (10.13039/100006602) FA955018-18RWCOR108 / Air Force Office of Scientific Research (10.13039/100000181) FA9550-15RWCOR123 / Air Force Office of Scientific Research (10.13039/100000181)
- Language
- English
- Date published
- 06/07/2022
- Academic Unit
- IIHR--Hydroscience and Engineering; Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984261344202771
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