On the analysis of adiabatic strong discontinuities within Thermoplastic solids

摘要

Localization of inelastic deformations within narrow bands is a failure phenomenon frequently observed in laboratory experiments as well as in nature and is considered as a precursor to fracture. Thereby, localization is often strongly coupled to the accompanying thermal field due to effects like thermal expansion and thermal softening. For example (Marchand & Duffy, 1988) carried out experiments on low alloy structural steel and observed the influence of local heating under adiabatic conditions on the nucleation of shear bands. Therefore, an integrated analysis of localization within thermomechanically coupled theories of inelastic constitutive behaviour is a challenging task.