Journal article
Void collapse generated meso-scale energy localization in shocked energetic materials: Non-dimensional parameters, regimes, and criticality of hotspots
Physics of fluids (1994), Vol.31(1), p.16103
01/2019
DOI: 10.1063/1.5067270
Abstract
The formation of hotspots due to collapse of voids leads to enhanced sensitivity of heterogeneous energetic (HE) materials. Several mechanisms of void collapse have been identified, but the regimes in which these mechanisms dominate have not been clearly delineated using scaling arguments and dimensionless parameters. This paper examines void collapse in cyclotetramethylene-tetranitramine (HMX) to demarcate regimes where plastic collapse and hydrodynamic jetting play dominant roles in influencing hotspot related sensitivity. Using scaling arguments, a criticality envelope for HMX is derived in the form Σcr=∑(Ps,Dvoid), i.e., as a function of shock pressure Ps and void size Dvoid, which are controllable design parameters. Once a critical hotspot forms, its subsequent growth displays a complex relationship to Ps and Dvoid. These complexities are explained with scaling arguments that clarify the physical mechanisms that predominate in various regimes of hotspot formation. The insights and scaling laws obtained can be useful in the design of HE materials.
Details
- Title: Subtitle
- Void collapse generated meso-scale energy localization in shocked energetic materials: Non-dimensional parameters, regimes, and criticality of hotspots
- Creators
- N. 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
- Physics of fluids (1994), Vol.31(1), p.16103
- DOI
- 10.1063/1.5067270
- ISSN
- 1070-6631
- eISSN
- 1089-7666
- Number of pages
- 22
- Grant note
- FA9550-15-1-0332 / Dr. Martin Schmidt, AFOSR FA8651-16-1-0005 / Dr. Angela Diggs, EGLIN AFB, AFRL/RWML
- Language
- English
- Date published
- 01/2019
- Academic Unit
- IIHR--Hydroscience and Engineering; Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984121862802771
Metrics
31 Record Views