Determination of Dynamic Plastic Strain through the Use of Diffraction Gratings

Abstract

A new method is given for measuring dynamic plastic strain in metals under impact loading. Strain‐time curves for initial and reflected wave fronts have been determined using a gauge length of 1 32 in. The measurements are made by observing the behavior during strain of the diffracted and central images of an 8300 line reflection grating ruled on the specimen surface.