Before revision: Intermediate stress intensity range The Paris– Erdoğan equation holds over the mid-range of growth rate regime, but does not apply for very low values of approaching the threshold value , or for very high values approaching the material's fracture toughness, .
After revision: Intermediate stress intensity range The Paris– Erdogan equation holds over the mid-range of growth rate regime, but does not apply for very low values of approaching the threshold value , or for very high values approaching the material's fracture toughness, .