Creep and creep-rupture strength of gas turbine components in view of nonuniform temperature distribution

Abstract

The conventional model of Kachanov–Rabotnov–Hayhurst continuum fracture mechanics is extended to cover the case of variable temperature and strain hardening. The creep and damage rates are assumed to depend on temperature. The resulting model for nonisothermal creep and damageability is implemented in a finite-element code of the general-purpose software package ABAQUS. The mathematical model is tested on an axisymmetric problem for a gas turbine body.