4.6 Characterization of Crack-tip Stress Fields using Fracture
Mechanics Parameters
Crack tip hoop stresses calculated from the FE analysis under
creep-fatigue loading are compared with analytical crack tip stresses
from RR (Riedel and Rice) fields [18] which are theC *-controlled crack-tip stress fields under steady state creep
conditions for a power-law creep material. The stress fields are given
by