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

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