Science and Technology of Energetic Materials

Vol.67, No.5 (2006)

Research paper

Simplified pressure calculation of reacting explosives
Shiro Kubota, Kunihito Nagayama, Yuji Wada, and Yuji Ogata


In numerical simulations of shock initiation process of condensed explosive, state variables in reaction zone are regarded as simple mixture phase of the unreacted and the reacted components. The relations of the specific volumes of the unreacted and the reacted component were investigated under the four types of assumptions. From the numerical results, it was indicated that the specific volume of the unreacted component can be described by the specific volume of the reacted component under the certain assumptions. This relation can be applied as the simplified pressure calculations of the reacting explosive. The reason why there is such relation is that the unreacted and the reacted components approximately pass two types of single lines in Pressure and specific volume plane, respectively. It has been found that the compression processes of reacted component in reaction zone have the path close to Hugoniot line for reacted component under isentropic solid assumption.

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Shock initiation process, Reacting explosive, Simple mixture theory, Numerical simulation

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