J-A elastic-plastic crack tip field and the two-parameter fracture criterion

The paper deals with a review of theoretical and numerical aspects of the two-parameter J-A approach in elastic-plastic fracture mechanics. This approach is based on the three-term asymptotic expansion for the stress field near the tip of mode I crack in an elastic-plastic solid. The parameter A is introduced in fracture criterion as a constraint parameter. The unified JC-A master curve is constructed for different geometry and thickness of specimens. Constraint parameter A and J value for various configurations of specimens and the hardening exponent is computed by means of three-dimensional elastic-plastic stress analyses employing finite element method.