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A Simplified Method for Determining Reactive rate Parameters for Reaction Ignition and Growth in Explosives

Published online by Cambridge University Press:  10 February 2011

Philip J. Miller
Philip J. Miller*
Affiliation:
Engineering Sciences Branch, Research and Technology Division Naval Air Warfare Center, Weapons Division, China Lake, CA 93555–6001
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Abstract

A simplified method for determining the reactive rate parameters for the ignition and growth model is presented. This simplified ignition and growth (SIG) method consists of only two adjustable parameters, the ignition (I) and growth (G) rate constants. The parameters are determined by iterating these variables in DYNA2D hydrocode simulations of the failure diameter and the gap test sensitivity until the experimental values are reproduced. Examples of four widely different explosives were evaluated using the SIG model. The observed embedded gauge stress-time profiles for these explosives are compared to those calculated by the SIG equation and the results are described.

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