Explosive driven rapid fracture in a structural body will be preceded by a compression
process, and the compression effects on mechanical properties of the materials are clearly important
to understand shock-induced failure such as spall or fragmentation phenomena. In this study, incident
shock waves in plate specimens of aluminum A2017-T4 and 304 stainless steel are generated by plane
detonation waves in the high explosive PETN initiated using wire-row explosion techniques, and the
compressed specimens are successfully recovered without severe damages due to the reflected
expansion waves with use of momentum trap method. A hydro code, Autodyn-2D is applied to
determine test conditions: thicknesses of explosives, attenuators, specimens and momentum traps and
to evaluate experimental results, simulating time-histories of stress waves in the layers of the test
assembly. Microhardness distributions in cross-sections, tensile strength, fracture ductility and yield
stress are measured for the recovered specimens, using miniature tensile and compression test pieces
machined from them. They are compared with those of virgin specimens, showing significant
increase of hardness, tensile and yield strength and remarkable reduction of elongation and ductility
for shocked specimens. The results are taken into consideration for evaluation of experimental
fragmentation energy in cylinder explosion tests.