Impact-Echo: A Method for Flaw Detection in Concrete Using Transient Stress Waves

摘要

The report covers the developments for a nondestructive test method for heterogenous solids such as concrete, analytical, numerical, and laboratory studies of transient stress wave propagation in solid plates and in plates containing flaws are presented. The technique, which is referred to as the impact-echo method, involves introducing transient stress waves into a test object by mechanical point impact and monitoring reflections of the waves into a test object by mechanical point impact and monitoring reflections of the waves from internal defects and external boundaries using a point receiver located close to the impact point.