On the stress and strain fields ahead of a stationary crack in creeping solids

A set of finite-element calculations has been performed to assess the validity of several commonly used crack tip parameters for creeping solids. Three specimen geometries, single- and double-edge notched, and centre cracked plate have been studied, all using mode I loading under plane-strain conditions. The variation in the steady-state C∗ field with test geometry, the time required to reach steady state, and the stress-strain fields which …