EXTENSION DU TEST DE L'ONDE DE CHOC CALIBREE AUX CHOCS FORTS DE COURTE DUREE

摘要

This study allowed us to develop a Calibrated Shock Wave test in the domain of strong shocks (> 15 Gpa) and short time duration (100 ns<) at low and room temperatures, with the Impulse Electric Launcher developed at the SNPE. Two heteregeneous explosive compositions with NTO have been tested, the Electric Launcher data have been compared to those obtained with a classical Calibrated Shock Wave test carried out in the same conditions of temperature. These Electric launcher data confirm that the iso-energy criterion (Puτ) is not adapted to the two tested explosive compositions. Nevertheless, the evolution of the critical energy seems to be well represented by two criteria (James and Peugeot-Quidot) in all the pressure-time domain. The low temperature tests (-55℃) realized with the Impulse Electric Launcher confirm that the low temperatures have practically no effect on the shock initiation threshold of the two heteregeneous explosives used in this study.