Before revision: In the linear elastic fracture regime, is also equivalent to the load ratio The Paris– Erdogan equation does not explicitly include the effect of stress ratio, although equation coefficients can be chosen for a specific stress ratio.
After revision: In the linear elastic fracture regime, is also equivalent to the load ratio The Paris– Erdoğan equation does not explicitly include the effect of stress ratio, although equation coefficients can be chosen for a specific stress ratio.