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Keywords: stress intensity factor
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Proceedings Papers

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A041, July 13–15, 2021
Paper No: PVP2021-60601
... crack on internal surface of hydrogen storage vessel. First of all, based on linear elastic fracture mechanics, the stress intensity factors and crack tolerance of 4130X steel hydrogen storage vessel have been calculated by means of finite element method based on interaction integral theory...
Proceedings Papers

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A050, July 13–15, 2021
Paper No: PVP2021-64385
.... If these cracks cannot be detected at an early stage, there is a real potential for the vessel to rupture with obvious dangerous consequences. The behavior of fractured or geometric discontinuity structures can be investigated with linear elastic fracture mechanics (LEFM) parameters. The stress intensity factor...
Proceedings Papers

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A044, July 13–15, 2021
Paper No: PVP2021-61406
... on the closed-weight function formula for the stress intensity factor (SIF) for axial cracks in hollow cylinders subjected to thermal shock. The method is explained together with some illustrative examples for real low allow steel used in nuclear applications. In order to obtain the temperature and stress...
Proceedings Papers

Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A010, July 13–15, 2021
Paper No: PVP2021-61684
... behaviour and crack extension by ductile tearing. Generally, elastic stress intensity factor (K I ) solutions, such as those in R6, only consider the surface and deepest point locations, and therefore do not provide a methodology to account for any interactions at material interfaces. Therefore...
Topics: Stress
Proceedings Papers

Proc. ASME. PVP2020, Volume 8: Operations, Applications, and Components, V008T08A022, August 3, 2020
Paper No: PVP2020-21123
... of Pressure-Temperature limit. In this paper, stress intensity factor is computed by using 3D finite element analysis (FEA) considering ¼T corner cracks of inlet nozzle and outlet nozzle in reactor pressure vessel. The result is compared with the stress intensity factor using influence function in the ASME...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A108, August 3, 2020
Paper No: PVP2020-21774
... mockup canister. Through-wall and part-through-wall (surface) starter cracks, either parallel or perpendicular to the weld, were fabricated with electrical discharge machining (EDM) in the weld region. The stress intensity factors (K I ) for each machined starter crack under canister WRS were estimated...
Proceedings Papers

Proc. ASME. PVP2020, Volume 1: Codes and Standards, V001T01A002, August 3, 2020
Paper No: PVP2020-21438
...COMPARISON OF STRESS INTENSITY FACTOR COEFFICIENTS FOR PLATES AND CYLINDERS UNDER MEMBRANE STRESS Darrell R. Lee BWX Technologies, Inc. Barberton, Ohio, USA Russell C. Cipolla, Michael C. Liu Intertek AIM Santa Clara, California, USA ABSTRACT Until the 2000 Edition of API-579 [1], the geometries...
Proceedings Papers

Proc. ASME. PVP2020, Volume 1: Codes and Standards, V001T01A053, August 3, 2020
Paper No: PVP2020-21549
...STRESS INTENSITY FACTOR AND CRACK OPENING AREA OF CIRCUMFERENTIALLY-CRACKED PIPE UNDER TORSION MOMENT Yifan Huang, Xinjian Duan Candu Energy Inc., Mississauga, ON, Canada ABSTRACT The deterministic leak-before-break (LBB) analysis and probabilistic fracture mechanics (PFM) assessment are two...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6A: Materials and Fabrication, V06AT06A055, July 14–19, 2019
Paper No: PVP2019-94022
... the appropriate fracture parameters to assist in this flaw assessment procedure. These computational efforts involved examining the fracture response of the system in preparation for planned inspections. Stress intensity factors were evaluated for a total of ten (10) cracks inserted into the refinery pressure...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6A: Materials and Fabrication, V06AT06A021, July 14–19, 2019
Paper No: PVP2019-94002
... and Technology Directorate Savannah River National Laboratory Aiken, South Carolina, USA ABSTRACT From linear elastic fracture mechanics (LEFM), it is well accepted that only the singular stress near the crack tip contributes to the fracture event through the crack tip stress intensity factor K. In the biaxial...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6B: Materials and Fabrication, V06BT06A046, July 14–19, 2019
Paper No: PVP2019-93720
..., such as longitudinal and circumferential welds, using the NESSUS ® probabilistic modeling software and NASGRO ® fracture mechanics software. In this study, the probabilistic framework was used to predict variability in the stress intensity factor associated with different reference flaws located in the head-to-shell...
Proceedings Papers

Proc. ASME. PVP2012, Volume 3: Design and Analysis, 515-524, July 15–19, 2012
Paper No: PVP2012-78135
... detected and comprehensively evaluated. Second, the dissection results of the multilayer urea reactor confirmed that the acoustic emission source locations were heavy weld radial expansion cracks. Third, crack stress intensity factors were calculated in accordance with the finite element analysis results...
Proceedings Papers

Proc. ASME. PVP2012, Volume 6: Materials and Fabrication, Parts A and B, 63-72, July 15–19, 2012
Paper No: PVP2012-78500
... 1 Copyright © 2012 by ASME ESTIMATION OF STRESS INTENSITY FACTORS DUE TO WELDING RESIDUAL STRESSES FOR CIRCUMFERENTIALLY CRACKED PIPES Chang-Young Oh Dept. of Mechanical Engineering Korea University Seoul, Korea E-mail: ohmiracle@korea.ac.kr Ji-Soo Kim Dept. of Mechanical Engineering Korea...
Proceedings Papers

Proc. ASME. PVP2010, ASME 2010 Pressure Vessels and Piping Conference: Volume 6, Parts A and B, 1275-1280, July 18–22, 2010
Paper No: PVP2010-25157
... diffraction measurements are performed on the pre-compressed specimens and after thermal soaking, to determine the redistribution of the residual stress as the crack extends. Stress intensity factors (SIF’s) are estimated using an upper-bound linear distribution to model the redistribution of residual stress...
Proceedings Papers

Proc. ASME. PVP2009, Volume 3: Design and Analysis, 593-602, July 26–30, 2009
Paper No: PVP2009-78055
... such as DCB (Double Cantilever Beam) specimen. In the static case, the stress intensity factor (SIF) is derived at the crack tip through the compliance approach for fixed displacement conditions. In the dynamic case, the energy balance criterion is employed to obtain the equation of motion for a running crack...
Proceedings Papers

Proc. ASME. PVP2009, Volume 6: Materials and Fabrication, Parts A and B, 191-195, July 26–30, 2009
Paper No: PVP2009-78014
... 12 07 2010 An eigenvalue method was proposed to study the stress intensity factors associated with the oscillating stress singularity for the axisymmetric cylindrical interface crack of the fiber/matrix composites. The fiber is a transversely isotropic material and the matrix...
Proceedings Papers

Proc. ASME. PVP2007, Volume 3: Design and Analysis, 335-341, July 22–26, 2007
Paper No: PVP2007-26549
.... To calculate a stress intensity factor for a postulated crack considering the stress discontinuity with the plastic yielding of cladding, the scheme developed previously has been incorporated into the PASCAL code for the structural integrity analysis. Using the new scheme, conditional probabilities of crack...
Proceedings Papers

Proc. ASME. PVP2007, Volume 6: Materials and Fabrication, 385-389, July 22–26, 2007
Paper No: PVP2007-26429
... temperature for 15 and 30 days. Three levels of initial stress intensity factors (K 1 ) were used to determine crack propagation following exposure of the DCB specimens to the test environment. The results indicate that the magnitude of K 1 was substantially reduced after testing, the extent of reduction...
Proceedings Papers

Proc. ASME. PVP2002, New and Emerging Computational Methods: Applications to Fracture, Damage, and Reliability, 193-199, August 5–9, 2002
Paper No: PVP2002-1208
... reactor vessel. The stress intensity factors K were calculated at the deepest and outermost surface points of the crack using the influence function method. A database was prepared for the cracks with a depth of 0.022 t - 0.5 t (t: pressure vessel thickness) and an aspect ratio of 0.1a/c - 1.0 a/c...
Proceedings Papers

Proc. ASME. PVP2002, New and Emerging Computational Methods: Applications to Fracture, Damage, and Reliability, 211-220, August 5–9, 2002
Paper No: PVP2002-1211
... stress intensity factor strain energy density FATIGUE THRESHOLD CONSIDERATIONS DURING CRACK PROPAGATION Lichun Bian Department of Mechanical Design, Automobile Hi-Technology Research Institute College of Engineering, Chonbuk National University, Chonju, South Korea Fax: (82)63-2702460, E-mail: lichb...