The J-Integral as a Fracture Parameter
J-dominance
- crack tip conditions are equal for all geometries and they are all controlled by the magnitude of J.
- large deformation zone (zone of intense deformation) can be expected to extend one CTOD distance beyond the crack tip
- this zone is surrounded by a larger zone where J dominance applies.
- in order for J to be a valid fracture parameter, all pertinent length parameters (crack size, ligament size, and thickness) all exceed several times dt