Determination of the size of the plastic strain region in the study of mechanical properties of materials under dynamic shear loads

Abstract

The paper is concerned with the problem of determining the size of the plastic strain region when studying the properties of materials under dynamic shear loads. As an example, the behavior of AMg6 alloy specimens in dynamic tests on the split Hopkinson pressure bar was studied by applying a Photron FASTCAM SA-Z 2100K high-speed camera and DIC technology. The shear strain fields and the width of the strain localization region were determined experimentally. The size of the plastic strain region evaluated through numerical modeling correlates well with the results of the experiment determining the size of this region with the use of high-speed camera and DIC technology. The investigation by means of numerical modeling techniques has shown that in the specimens being considered the shear component of the strain tensor in absolute value significantly prevails over the axial component.