Experimental Techniques for Shock Loading

Abstract

Three experimental techniques are used in the present investigation: (i) shock loading under uniaxial strain conditions (planar collision of an impactor and a target), (ii) pulse loading of planar targets with a high-power electron beam and (iii) the penetration of elongated hard rods into a planar target. (i) Tests conducted under uniaxial strain conditions (ii) For short times, near the loaded contact plane, the effects of viscosity and thermo-conductivity are usually very small. During loading with short stress pulses, the slow diffusion processes that provide the transport of momentum and energy do not have time to develop. In this situation, investigation of the deformation processes in the contact region of the shock-loaded target is possible only by loading with stress pulses of very short duration. In the present investigation, loading with short stress pulses was performed using a high-power pulse electron beam. (iii) The penetration tests allow the structure to evolve depending on the impact velocity to be retraced by means of parallel structural investigations of specimens that experience different shock loading schemes.