NOMENCLATURE
a, a0 crack length and its initial value
α back stress tensor
BN net thickness of specimen
C* C* -integral
Δa crack growth length
E Young’s modulus
ε strain
εc creep strain
εpc , εsc primary and secondary creep strain
\(\varepsilon_{\text{ref}}^{p}\),\({\dot{\varepsilon}}_{\text{ref}}^{c}\) reference plastic and creep strain
m strain hardening exponent
n creep exponent
Nf cycles to failure
J J -integral
p equivalent plastic strain
P0 plastic limit load
Pmax, Pmin applied maximum and minimum load
R load ratio (Pmin /Pmax )
σ stress
σ stress tensor
σ0 yield strength
σref reference stress
\(\sigma_{\text{ij}}^{\text{RR}}\) RR field
\({\tilde{\sigma}}_{\text{ij}}\) dimensionless stress function
σ0y yield strength at zero plastic strain
th creep-fatigue hold time
tfp end of primary creep time
W width of the specimen