Abstract
Post-impact deformation of projectiles is studied in relation to flyer-plate thickness and standoff distance from a rigid anvil, without significant penetration and perforation of the flyer plate. A close-range photogrammetric measuring technique is used to determine the final profiles of polymeric cylindrical projectiles. This non-destructive measurement technique is utilized to study the effects of projectile nose geometry on the high rate deformation process, at speeds ranging from 100 to 600 m/s, in connection with metal sheet deformation during impact spot welding. An Imacon ultra-high speed camera is used to photograph the deforming polymeric projectiles.