Influence of Explosive Composition and Structure on Shock to Detonation Transition

 

Vesna Džingalašević

Gordana Antić

Danica Simić

Zoran Borković

 

This paper includes the results of the examination of the explosive detonation process development by shock wave initiation. A new method, a modified GAP test, has first been defined for examining the explosive sensitivity to shock waves. The GAP system consists of a flat shock wave generator and an attenuator of polyethylene with a determined shock adiabate. Shock sensitivity is examined for FH-5 and FP-5 explosive charges and for LKE-11 and LKE-15 cast composite explosives using the modified GAP test. The shock to detonation transition (SDT) process was tested in cast composite (LKE-70/10, LKE-11 and LKE-15) and pressed explosives (FH-5 and FP-5) for different values of the shock wave pressure. The distance to detonation and the ''Pop-plot'' diagram were determined for each explosive composition and shock pressure intensity after the analysis of the obtained results.

Key words: shock wave, detonation initiation, mass velocity, cast explosive, pressed explosive, Lagrange velocity gage, GAP test.