Ausbreitung von elastischen Oberflächendeformationen bei Stoβbelastung fester Körper

The propagation of elastic surface deformations in solids excited by shocks have been studied by means of high speed cinematography. For some specimens of steel and glass excited by an explosive charge or a projectilethe pictures show the propagation of two deformation fronts and their reflections at the edges. The propagation velocities of these fronts are in accordance with the velocities of longitudinal and transversal waves respectively in a mediumof infinite extension.Finally.theinfluenceofshockfrontsonthe enlargement of surface cracks has been studied.