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The remnant imprint from the surface of a rotating disc collided by a dropping steel ball is experimentally analysed. The study of post-impact indentation performed via laser scanning technique revealed a systematic aspect concerning the radial profile of the imprint, namely a deviation from the slope predicted by theory of elasticity in the region between imprint and the periphery of the disc. Keywords—Plastic impact, rotating disc, scanned indentation

A CONSEQUENCE OF POST-IMPACT RADIAL PROFILE SHAPE OF INDENTATION. PART I - EXPERIMENTAL EVIDENCES