Accession Number : ADA290441

Title :   A Thermochemical Transport Model for Analysis of Hot-Spot Formation in Energetic Materials.

Descriptive Note : Final rept.,

Corporate Author : IOWA UNIV IOWA CITY DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Butler, P. B. ; Bonnett, David

PDF Url : ADA290441

Report Date : 02 DEC 1994

Pagination or Media Count : 41

Abstract : The focus of this research is on the prediction of inadvertent ignition and detonation of condensed-phase, energetic materials. Specifically, the work focuses on hot spot formation in high-energy propellants and explosives. A viscoplastic pore collapse model is developed to analyze the potential for hot spot formation in porous, condensed-phase, energetic materials. This model treats the dynamics and thermodynamics of a collapsing spherical void that has been subjected to weak shock loading. An volume-averaged energy balance is used to track temporal variations of the pore gas temperature, and a finite-difference method is used to solve the complete condensed-phase energy equation in the vicinity of a material discontinuity. Results from sample calculations focus on the interfacial energy balance in predicting the rate of localized temperature increase during shock compression.

Descriptors :   *THERMOCHEMISTRY, *IGNITION, *HIGH ENERGY PROPELLANTS, *DETONATION WAVES, COMPRESSION, TIME INTERVALS, TEMPERATURE, INTERFACES, SHOCK WAVES, SHOCK(MECHANICS), EXPLOSIVES, FINITE DIFFERENCE THEORY, TRANSPORT PROPERTIES, DYNAMIC LOADS, HOT SPOTS, DISCONTINUITIES, ENERGETIC PROPERTIES, LOW STRENGTH.

Subject Categories : Explosions
      Combustion and Ignition
      Ammunition and Explosives
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE