Normalization method for evaluating J-resistance curves of small-sized CIET specimen and crack front constraints

Based on dimensionless load separation principle, the normalization method for estimating J-resistance curves of CIET specimen for ductile materials has been developed. Experiments of ductile crack growth resistance on a typical pressure vessel steel SA-508 are conducted by using CT, SEB and CIET specimens. The resulted J-resistance curves show outstanding influence by load configuration and specimen dimensions. J-Q-M and J-A2-M approaches are...