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1 2008

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Numerical prediction of high explosive ignition under low velocity impact

Gruau C., Picart D.

Foundations of Civil and Environmental Engineering

2008

No. 12

33-48

In the framework of low velocity impact studies, dedicated to safety analyses of plastic bonded explosives (PBX), we propose a numerical tool, designed for predicting the ignition of a HMX (high melting point explosive) based composition. The major results are the use of a concrete-like constitutive law for the PBX and an efficient implementation of an ignition criterion. It has been shown that the calculation tool is able to accurately predict the results when the ignition is diluted. For localized ignition into shear bands or macro cracks, some differences between numerical and experimental results have been discussed..