Modeling of the Metal Cylinder Acceleration Under Explosive Loading

 

Predrag Elek

Slobodan Jaramaz

Dejan Micković

 

The paper considers the motion of a cylindrical metal liner caused by expanding products of internal detonation. A new analytical model of cylinder motion is developed for the case of axial initiation of an explosive charge. The suggested model relies on the two-stage regime of cylinder motion. The first stage considers the interaction of the detonation wave and the metal liner, resulting in the initial velocity imparted to the liner. The second stage is a gas-dynamic push of the cylinder governed by detonation products expansion, similarly to the Gurney approach. The numerical simulation of the explosive propulsion of the cylinder is performed using the FEM-based software Abaqus/Explicit. The results of the analytical model are validated by a comparison with the available experimental data and the simulation results.

Key words: detonation, detonation wave, propulsion, detonation effect, analytical model, numerical simulation, finite element method