Lack of Damage After Secondary Impacts Surprises Researchers

When a material is subjected to a shock or blast wave, damage often forms internally through spall fracture, and research is needed to know how these damaged materials respond to subsequent shock waves. Recent experimentation on spall fracture in metals found that, in certain cases, there was an almost complete lack of damage with only a thin band of altered microstructure observed. In the Journal of Applied Physics, researchers narrowed down exactly why the expected damage was missing.