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Title: MODELING COMPACTION INDUCED ENERGY LOCALIZATION IN GRANULAR HMX

Abstract

No abstract prepared.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
785436
Report Number(s):
LA-UR-99-3275
TRN: US200307%%441
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Jul 1999
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; COMPUTERIZED SIMULATION; MATHEMATICAL MODELS; COMPACTING; GRANULAR MATERIALS; CHEMICAL EXPLOSIVES; ENERGY SPECTRA

Citation Formats

K. A. GONTHIER, and S. F. SON. MODELING COMPACTION INDUCED ENERGY LOCALIZATION IN GRANULAR HMX. United States: N. p., 1999. Web.
K. A. GONTHIER, & S. F. SON. MODELING COMPACTION INDUCED ENERGY LOCALIZATION IN GRANULAR HMX. United States.
K. A. GONTHIER, and S. F. SON. 1999. "MODELING COMPACTION INDUCED ENERGY LOCALIZATION IN GRANULAR HMX". United States. doi:. https://www.osti.gov/servlets/purl/785436.
@article{osti_785436,
title = {MODELING COMPACTION INDUCED ENERGY LOCALIZATION IN GRANULAR HMX},
author = {K. A. GONTHIER and S. F. SON},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month = 7
}

Conference:
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  • A thermodynamically consistent model is developed for the compaction of granular solids. The model is an extension of the single phase limit of two-phase continuum models used to describe Deflagration-to-Detonation Transition (DDT) experiments. The focus is on the energetics and dissipation of the compaction process. Changes in volume fraction are partitioned into reversible and irreversible components. Unlike conventional DDT models, the model is applicable from the quasi-static to dynamic compaction regimes for elastic, plastic, or brittle materials. When applied to the compaction of granular HMX (a brittle material), the model predicts results commensurate with experiments including stress relaxation, hysteresis, andmore » energy dissipation. The model provides a suitable starting point for the development of thermal energy localization sub-scale models based on compaction-induced dissipation.« less
  • A simple extension of a conventional two-phase (inert gas and reactive solid) continuum model of Deflagration-to-Detonation Transition (DDT) in energetic granular material is given to account for energy dissipation induced by quasi-static compaction. To this end, the conventional model equations,, valid in the limit of negligible gas phase effects, are supplemented by a relaxation equation governing irreversible changes in solid volume fraction due to intergranular friction, plastic deformation of granules, and granule fracture. The proposed model constitutes a non-strictly hyperbolic system of equations, and is consistent with the Second Law of Thermodynamics for a two-phase mixture. The model predicts stressmore » relaxation and substantial dissipation induced by quasi-static compaction; such phenomena are commonly observed in quasi-static compaction experiments for granular HMX. Predicted intergranular stress histories compare well with experimental data.« less
  • A simple extension of a conventional two-phase continuum model of Deflagration-to-Detonation Transition (DDT) in energetic granular material is given to account for energy dissipation induced by quasi-static compaction. To this end, the conventional model equations are supplemented by a relaxation equation that accounts for irreversible changes in solid volume fraction due to intergranular friction, plastic deformation of granules, and granule fracture. The proposed model, which is consistent with the Second Law of Thermodynamics for a two-phase mixture, is demonstrated by applying it to the quasi-static compaction of granular HMX. The model predicts results commensurate with experimental data including stress relaxationmore » and substantial dissipation; such phenomena have not been previously accounted for by two-phase DDT models. {copyright} {ital 1998 American Institute of Physics.}« less
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  • Abstract not provided.