Unified constraint-based FAD assessments for ductile fracture in cracked pipes

Validation and application of a two‐parameter J‐Ad approach for fracture behaviour prediction

“…50 Because the parameter A d incorporates both in-plane and out-of-plane constraints, the two-parameter J-A d approach may have good transferability from one type of specimen to another 24 or from specimens to cracked components. 26,39 The J-A d approach also has good applicability for a wide range of materials, including ductile and brittle materials and welded joints in previous studies 24. 26 and the materials A and B in this work.…”

“…The two-parameter approach can be used for fracture analysis of any specimens and structures. 8,20,24,26,39,40 In this work, to validate the J-A d two-parameter approach, extensive experimental fracture toughness data of SEN(B) specimens having various sizes (different inplane and out-of-plane constraints) measured by Neimitz and Galkiewicz 35 were used. The experimental materials are 40H steel with two different heat treatments, namely, material A and material B.…”

“…In contrast, the two-parameter J-A d approach may be conveniently applied in fracture assessment and prediction for specimens or the defective structures by the CDF method 26 or FAD method. 39 In a recent work of Ouidadi et al, 50 another twoparameter fracture criterion (TPFC) was evaluated for various crack configurations made of 7075-T6 aluminium alloy using finite-element fracture simulations. In this TPFC, the elastic stress intensity factor K Ie is related to the net-section stress (S n ) at failure.…”

“…[36][37][38] To incorporate both constraints, the two-parameter J-A p and J-A d approaches have been developed by authors. 25,26,39 It has been shown that the use of the J-A p and J-A d approaches can reduce conservatism degree for shallower and shorter cracks with lower constraints in cracked components. It was suggested that the J-A d approach may be preferentially chosen for the structure fracture assessments due to the easy measurement and determination of the CTOD-based parameter A d .…”

“…To incorporate both constraints, the two‐parameter J‐A p and J‐A d approaches have been developed by authors 25,26,39 . It has been shown that the use of the J‐A p and J‐A d approaches can reduce conservatism degree for shallower and shorter cracks with lower constraints in cracked components.…”