A Study of Indentation Profiles of Sphere and Oiled Plate due to Impact Load

Abstract

This study was carried out to investigate the profile characteristics of the indentation caused by an impact load on an oiled plate by a sphere. The materials of the anvil and the sphere were either SUS304 or SUJ2 to investigate the effects of the handness on the identation profile. Each indentation profile was measured by the three-dimensional stylus profilometer. The deformed volume of a plate was confirmed to be smaller than that of a sphere. The profile of the indentation showed a clear entrapment of the oil. The center of the indentation becomes deeper and sharper with increasing viscosity and pressure viscosity coefficient of oil. Clear edge was recognized around an indentation on a sphere in the case of an oiled impact. On the contrary, an ambiguous edge was recognized in the case of dry impact.