A unified method for studying impact particle relation and spallation under shock loading

Abstract Spallation is the phenomenon that under impact loading, material interior reaches tensile failure limit instantaneously due to effect of two sparse waves moving in opposite directions, and cracks are formed interior. The specimen a certain alloy was taken as research object, planar experiment carried out by 20mm caliber one-stage light gas gun. free surface particle velocity curve obtained. Hugoniot state parameters, spallation strength, unloading strain rate other experimental data were obtained through theoretical analysis. results show that: spall strength proportional loading range: σ s = 0.37 × 10- 4 ε · ( GPa ); has higher wave impedance compared with C10100. parameters smaller than those calculated mass average method because special internal structure alloy. sample can be at same time using known flyer.