A Multi-Scale Modeling Framework for Shear Initiated Reactions in Energetic Materials
Abstract
A multi-scale approach for simulating shear initiated reactions in energetic materials is developed. The model utilizes a continuum level shear localization tracking algorithm, a mesoscale modeling approach to obtain a refined thermodynamic state in localized regions, and a sub-grid model to bring the mesoscale level information into the continuum mechanics code in a thermodynamically consistent manner. A particle-based mesoscale method that is capable of exchanging both heat and kinetic energy between particles is employed. The extent of reaction is calculated at the sub-grid level using an Arrhenius reaction rate expression with a dependency on temperature, pressure, and material properties. The sub-grid model also accounts for an energy dissipation process through heat conduction, which is expected for delayed initiation-type problems. The newly developed framework is implemented into an Eulerian wave propagation code. A sample problem is presented as a verification exercise.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2013
- Accession Number
- ADA586763
Entities
People
- John K. Brennan
- Linhbao Tran
- Muege Fermen-coker
Organizations
- United States Army Research Laboratory