Journal article
Collapse of elongated voids in porous energetic materials: Effects of void orientation and aspect ratio on initiation
Physical review fluids, Vol.2(4), 043201
04/2017
DOI: 10.1103/PhysRevFluids.2.043201
Abstract
The sensitivity of porous energetic materials depends on mesostructural heterogeneities such as voids, defects, cracks, and grain boundaries. The mesostructure of pressed explosives contains voids of arbitrary shapes including elongated voids of various orientations and aspect ratios. Mesoscale simulations to date have analyzed the effect of void morphology on the sensitivity of energetic materials for idealized shapes such as cylindrical, conical, and elliptical. This work analyzes the sensitivity behavior of elongated voids in an HMX matrix subject to shock loading. Simulations show that sensitivity of elongated voids depends strongly on orientation as well as aspect ratio. Ranges of orientations and aspects ratios are identified that enhance or inhibit initiation. Insights obtained from single elongated void analyses are used to identify sensitive locations in an imaged mesostructure of a pressed explosive sample.
Details
- Title: Subtitle
- Collapse of elongated voids in porous energetic materials: Effects of void orientation and aspect ratio on initiation
- Creators
- Nirmal Kumar RaiMartin J SchmidtH. S Udaykumar
- Resource Type
- Journal article
- Publication Details
- Physical review fluids, Vol.2(4), 043201
- DOI
- 10.1103/PhysRevFluids.2.043201
- ISSN
- 2469-990X
- eISSN
- 2469-990X
- Grant note
- DOI: 10.13039/100000181, name: Air Force Office of Scientific Research
- Language
- English
- Date published
- 04/2017
- Academic Unit
- IIHR--Hydroscience and Engineering; Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984121869302771
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