Analysis of Adiabatic Shear Bands in Thermoviscoplastic Materials Under CombinedLoading

摘要

We study the initiation and growth of adiabatic shear bands in a thin-walledsteel tube deformed first quasi-statically either in simple compression or simple tension or by a pressure applied to the inner surface of the tube and then one end of the tube is kept fixed and the other end is twisted with a prescribed tangential speed. The objective is to see how prior quasi-static deformations of the tube affect the nominal shear strain at which a shear band initiates in the tube. The first set of numerical experiments simulates tests recently conducted by Murphy who found that the nominal strain at the initiation of the shear bands decreased with an increase in the axial static compressive stress induced in the tube. (AN).