Barrier experiment: Shock initiation under complex loading

Menikoff, Ralph¹ 

[1] Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

关键词: detontion wave;    high explosive;    shock initiation;    complex loading;   

DOI  :  10.2172/1234498
RP-ID  :  LA--UR-16-20140
PID  :  OSTI ID: 1234498

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The barrier experiments are a variant of the gap test; a detonation wave in a donor HE impacts a barrier and drives a shock wave into an acceptor HE. The question we ask is: What is the trade-off between the barrier material and threshold barrier thickness to prevent the acceptor from detonating. This can be viewed from the perspective of shock initiation of the acceptor subject to a complex pressure drive condition. Here we consider key factors which affect whether or not the acceptor undergoes a shock-to-detonation transition. These include the following: shock impedance matches for the donor detonation wave into the barrier and then the barrier shock into the acceptor, the pressure gradient behind the donor detonation wave, and the curvature of detonation front in the donor. Numerical simulations are used to illustrate how these factors affect the reaction in the acceptor.