Abstract
The J-A concept, based on the three-term asymptotic solution for elastic-plastic crack-tip stresses, and the cumulative damage rule are employed to construct the quantitative two-parameter elastic-plastic J-A criterion. The fracture toughness as a function of the crack-tip constraint A in the fracture criterion is interpreted as the corrected elastic-plastic fracture toughness of a specimen with the corresponding constraint parameters A. The results of a study of the normalized corrected fracture toughness as a function of failure stresses, the crack aspect ratio and the strain hardening exponent of the material are presented. The significant effect of the strain hardening exponent on the normalized constraint corrected fracture toughness is observed.
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