Document Type
Conference Proceeding
Publication Date
12-1-2009
Abstract
An explicit, 2-D, Lagrangian finite and discrete element technique is used to characterize thermo-mechanical fluctuations in low pressure deformation waves propagating through particulate energetic solids. The technique combines conservation principles with a plane strain, thermoelastic-viscoplastic and friction constitutive theory to describe deformation and motion of individual particles; interaction between particles is described using an energy consistent, penalty based contact method. Emphasis is placed on characterizing the relative importance of volumetric and surface dissipation as meso-scale heating mechanisms. Predictions indicate that volumetric dissipation locally heats significant mass to modest temperatures, whereas surface dissipation locally heats a small fraction of mass to elevated temperatures that will likely trigger combustion. The dependence of hot-spot mass fraction on friction coefficient is examined. © 2009 American Institute of Physics.
Publication Source (Journal or Book title)
AIP Conference Proceedings
First Page
1377
Last Page
1380
Recommended Citation
Panchadhar, R., & Gonthier, K. (2009). Meso-scale heating predictions for weak impact of granular energetic solids. AIP Conference Proceedings, 1195, 1377-1380. https://doi.org/10.1063/1.3295065