Shock Pulse Generation Using Explosive Driven Metal Drivers - Practical Considerations.

摘要

The present paper examines the practical aspects of using the mousetrap plane wave generator design to shock-harden metal targets of iron and copper. The paper investigates three driver plate designs and two plate sizes and compares the experimental x-ray plate profile with that provided by the modelling code Dyna 3D for the same run conditions. For the larger driver plate series of 110 mm square, the central planar area available for shock hardening using the full plate compared favourably with that provided by the driver design incorporating steel edge confinement. Drivers using explosive overhang as driver edge confinement provided the smallest central planar area for shock hardening. Shock hardening was not possible with smaller drives of 55 mm square due to the degree of plate curvature experienced before target impact. The modelling code Dyna 3D provided close agreement with experiment for the smaller driver series except where steel edge confinement was used, while for the larger driver series the modelling code consistently predicted greater plate curvature for all three designs than was experienced in practice. Planar pressure pulse, Driver distortion, Shock hardening, Compressive shock pulse, High strain-rate impulsive loading.