Dependence of Energy-Absorbing Capacity on Mechanical Properties Under Penetration

Abstract

Penetration tests on thin circular sheets were carried out in order to clarify the dependence of the energy-absorbing capacity on mechanical properties involving fracture toughness. The sheet materials, all with a thickness of 1.0 mm, used in this study were extra super duralumin for airplanes, corrosion-resisting aluminum alloy for super express trains and cold-rolled carbon steel for motorcars. Moreover, the dynamic factor which caused the effect on the energy-absorbing capacity of a thin plate under penetration was considered. As a result, it was clarified that fracture toughness is as predominant as the yield point and ultimate strength for energy of the ballistic limit.