The asymptotic structure of a shear band in mode-II deformations
A shear band is assumed to propagate at; a uniform velocity in a thermoviscoplastic body being deformed in mode-II. The deformation field appears steady to an observer situated on and moving with the shear band tip. The region around the shear band tip is divided into a core region and an inertial region. The core region is behind the shear band tip, and the inertial region surrounds the band tip but excludes a small region around the tip. Asymptotic fields for the velocity, temperature and the effective stress are determined in the inertial region. The dependencies of the thermal width of the band and of the rate of energy dissipated within the core region behind the shear band-tip upon the speed of the shear band are exhibited. (C) 1999 Elsevier Science Ltd. All rights reserved.