On the Plastic Deformation of Rectangular Drawing : 1st Report, Measurement of the Strain

Abstract

In this report, as the first step of analysis of rectangular drawing of sheet metal, the strain distribution is evaluated. The grid pattern was mechanically drawn on the surface of an aluminum disk of 0^.5 mm thick by means of a scriber, and the disk was drawn with square dies set on double action cam drawing press. Deformaton of the grid pattern was measured with U.M.M. and change of thickness with an optimeter. From these results the magnitude and direction of principal strains were calculated.