Issues relating to numerical modelling of creep crack growth

Prediction of creep crack growth behavior in Cr–Mo–V steel specimens with different constraints for a wide range of C∗

“…(2) and (3) has been widely used in creep crack growth (CCG) prediction [25][26][27][28], and the uniaxial creep ductility e f in Eq. (4) is usually assumed to be a constant for a given temperature.…”

“…The ductility exhaustion based creep damage model has been widely used in the simulations of CCG [25][26][27][28]. In this damage model, the rate of damage _ x is defined by the ratio of equivalent creep strain rate _ e c and multiaxial creep ductility e à f [25][26][27][28].…”

“…In this damage model, the rate of damage _ x is defined by the ratio of equivalent creep strain rate _ e c and multiaxial creep ductility e à f [25][26][27][28].…”

“…At present, there are many models to describe the relationship between the creep ductility and stress triaxiality, but the Cocks and Ashby model [45] in Eq. (4) was widely used which is based on the cavity growth theory by power-law creep [25][26][27][28]:…”

“…The creep ductility exhaustion model has been widely used in creep crack growth predictions [25][26][27][28], and the uniaxial creep ductility is usually assumed to be a constant for a given temperature. This constant creep ductility is usually determined by the accelerated uniaxial creep tests at higher stress levels.…”