... method is the crack driving force. Both crack assessment methods concurred that the cracks are sub-critical. The deeper crack case located at the side of the nozzle gave the largest J-integral value of the examined cracks and was less than the material estimated toughness. Weld residual stress...

... Abstract Research funded by the Electric Power Research Institute (EPRI) in the 1980s produced a series of Ductile Fracture Handbooks including J-integral solutions for structural components with cracks. The EPRI Handbook series was to serve as an elastic-plastic equivalent to stress-intensity...

... and expansion law are studied in combination with fracture morphology analysis. The dynamic J-integral of the material was obtained by the rate of change curve method of flexibility, and then the equation for solving the quasi-static J-integral based on the dynamic test method of CVN specimens was established...

... propagation fatigue crack growth stress intensity factor J -integral Proceedings of the ASME 2022 Pressure Vessels & Piping Conference PVP2022 July 17-22, 2022, Las Vegas, Nevada, USA PVP2022-84684 CRACK GROWTH SIMULATION USING ITERATIVE CRACK-TIP MODELING TECHNIQUE Gi-Bum Lee and Nam-Su Huh Dept...

..., and crack length. The crack locations included axial, circumferential, internal, and external cracks. 3-D crack meshes were generated for each case to compute J-integral versus pressure result trends, which were used to determine the reference stress. The Failure Assessment Diagram (FAD) method uses...

... stable crack tearing and for evaluating the J-integral resistance (J-R) curve from a single specimen test. The normalization method is a semi-analytical methodology that was developed in the 1990s based on the load separation approach with use of load-line displacement (LLD) for a single edge notched...

... changes with the mixity level. P355NL1 steel mixed mode fatigue crack crack growth rate fractography energy methods J-integral FRACTOGRAPHY STUDY OF THE MIXED MODE FATIGUE CRACK GROWTH PROCESS IN PRESSURE VESSEL P355NL1 STEEL Grzegorz Lesiuk Department of Mechanics, Materials Science...

... 2006 when DNV published the first SENT test practice, many investigations have been done, and various SENT test methods were developed, including CANMET and ExxonMobil methods in terms of the J-integral and CTOD. The effort led to the first SENT test standard BS 8571 being published in 2014. However...

... Abstract In the present study, simple J-integral estimations of welded pipes with a circumferential through-wall crack (TWC) in weld zone were proposed based on the failure assessment diagram (FAD) concept using scaling factor that is defined as a ratio of plastic limit load of welded pipe...

... and the component geometry. In one-parameter fracture mechanics a single parameter, K or J-integral, is sufficient to characterize the crack front stresses. When geometry dependent effects are observed, two-parameter fracture mechanics can be used to improve the characterization of the crack front stress, using T...

... Copyright © 2012 by ASME 1 DEFORMATION VERSUS MODIFIED J-INTEGRAL RESISTANCE CURVES FOR DUCTILE MATERIALS Xian-Kui Zhu Battelle Memorial Institute 505 King Avenue Columbus, Ohio 43201, USA Poh-Sang Lam Materials Science and Technology Savannah River National Laboratory Aiken, South Carolina 29808...

... Transferability of fracture mechanics properties Ductile tearing Fracture mechanics assessment Porous metal plasticity Cladded pipes J-Integral Constraint modified specimens This paper describes new results of the STYLE study on investigations of transferability of fracture material...

... The J -integral is an important concept in the elastic-plastic fracture mechanics, and serves as a critical material parameter to quantify the toughness or resistance of ductile materials against fracture. The relation between the J -integral and crack extension has been widely used...

... of the project. Transferability of fracture mechanics properties Ductile tearing Fracture mechanics assessment Gurson model Cladded pipes J-Integral Constraint modified specimens 1 Copyright © 2011 by ASME Proceedings of the ASME 2011 Pressure Vessels & Piping Division Conference PVP2011 July 17...

... methods based on fracture mechanics parameters (e.g KI or J-Integral) as well as methods based on local micromechanical models (e.g. Gurson s porous plasticity model and its variations). Micromechanical models have some advantages compared to those based on single term fracture parameters, especially...

... 14 01 2011 The J -integral resistance curve is the most important material property used in structural integrity assessment. ASTM E1820 is a commonly used fracture toughness test standard for measuring the critical value of J -integral at the onset of ductile fracture and J-R curve...

... measurement. J-integral load-line-displacement front-face-displacement CT bend fracture toughness tests 1 Copyright © 2009 by ASME Proceedings of PVP2009 2009 ASME Pressure Vessels & Piping Division Conference July 26-30, 2009, Prague, Czech Republic PVP2009-77977 EXPERIMENTAL OBSERVATION...

... Engineering Assessment methods (EAM) have been established i.e. Local flow stress concept (Germany), assessment based on J-Integral (France RSE-M), Limit load calculation according to (ASME XI, USA) or Two criteria approach (R6, UK). These EAM are verified by a large number of testscarried out in the past...

..., the ASTM test method for determining fracture toughness is applied to SENB specimens to determine Klc of both materials. PE80 shows greater resistance to fracture than PE100. Keywords: Polyethylene, J-Integral, fracture toughness, crack opening displacement. NOMENCLATURE ao Initial Crack Length ap Final...

..., it is recommended that sulfur content should be limited to a considerably low level and the pore should be eliminated by modifying the welding procedure specification. KEY WORDS: narrow gap welding, J-integral, LBB, inclusion, pore INTRODUCTION A design concept of LBB has been successfully applied to the ferritic...