Effect of Material Parameters on the Initiation and Growth of Adiabatic

The thermomechanical problem involving simple shearing of a finite slab made of an isotropic and viscoplastic material is studied with the objective of finding the e&t of the strain hardening parameter, strain-rate hardening parameters, thermal softening coeflicient and thermal conductivity on the initiation and growth of adiabatic shear bands. The body is placed in a hard loading device, i.e. the velocity is prescribed at its top and bottom smfacu. A shear band is presumed to have fonned if the addition of a perturbation in the temperature at the onset of plastic flow results in a localization of the shear strain. The critical strain at which the band begins to form is found and its dependence on various material parameters is investigated.