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Keywords: fracture mechanics
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Proceedings Papers

Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A027, July 13–15, 2021
Paper No: PVP2021-60495
... applicable in the ageing and lifetime triaxiality, Fracture mechanics, cracks in piping management of primary circuit components. NOMENCLATURE To support development and validation of those methods a large scale test programme was developed c Total crack angle / total crack length with the aim to investigate...
Proceedings Papers

Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A064, July 13–15, 2021
Paper No: PVP2021-61027
... on the stress state of the specimen. It is demonstrated that the modifications to the mini-CT specimen geometry will not lead to significant deviations in the stress patterns and J-integral values compared to the standard geometry. fracture mechanics long-term operation miniature testing RPV mini-CT...
Proceedings Papers

Proc. ASME. PVP2021, Volume 1: Codes and Standards, V001T01A021, July 13–15, 2021
Paper No: PVP2021-60413
... shapes, flaw orientations and different load cases. The final scope is to quantify how the flaw projection into planes normal to the maximum principal stresses is conservative and how this conservatism could be improved, if need be. flaw characterization mixed modes fracture mechanics extended...
Proceedings Papers

Proc. ASME. PVP2021, Volume 1: Codes and Standards, V001T01A029, July 13–15, 2021
Paper No: PVP2021-62169
... component co-reliability crack growth rate crack initiation crack propagation cracked pipe failure probability fatigue modeling fracture mechanics gas pipeline inspection interval minimum time to failure multi-scale modeling NDE nondestructive evaluation oil pipeline piping POD powerplant...
Proceedings Papers

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A034, July 13–15, 2021
Paper No: PVP2021-61530
..., it is necessary to use fracture mechanics methods to analyze the fatigue life of gas cylinders in a high-pressure gaseous hydrogen environment. In this work, a method for calculating the fatigue life of fracture mechanics for hydrogen storage cylinders was established according to ASME VIII-3 KD-10...
Proceedings Papers

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A018, July 13–15, 2021
Paper No: PVP2021-61856
... for P-T limit calculations considering the pressure and temperature at various operating transient conditions. However, the elastic fracture mechanics solutions in Section XI are only suitable for cylindrical reactor pressure vessel (RPV) beltline without geometric discontinuities. Hence...
Proceedings Papers

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A021, July 13–15, 2021
Paper No: PVP2021-61954
... and pressure vessel manufacturers (JSPVM) developed a methodology to estimate MPT envelope for Cr-Mo steel pressure vessels. Recently, a state-of-the-art fracture mechanics based methodology is published in Welding Research Council (WRC) Bulletin 562 to determine MPT envelopes for equipment operating in high...
Proceedings Papers

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A041, July 13–15, 2021
Paper No: PVP2021-60601
... pressure. Hence, the small cracks on the surface of pressure vessel may grow rapidly then lead to rupture. Therefore, this paper makes a series of research on how to evaluate the 4130X steel hydrogen storage vessel with fracture mechanics. This study is based on the assumption that there is a semi-elliptic...
Proceedings Papers

Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A047, August 3, 2020
Paper No: PVP2020-21747
... determined by a fracture mechanics approach using a R6 based fracture assessment and crack growth analysis. The results show a large difference in fatigue life depending on the method used. For the plastic analyzes it is of great importance to the result in which direction the evaluation is made...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A001, August 3, 2020
Paper No: PVP2020-21026
... author: diego.mora@psi.ch the damage initiation criterion but the crack does not propagate in radial direction (GI<GIC). Keywords: PTS, SIF, Fracture mechanics, LBLOCA, TRACE NOMENCLATURE ACC Accumulators BCC Body-Centered Cubic CT Compact Test DFM Deterministic Fracture Mechanics DC Downcomer ECC...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A009, August 3, 2020
Paper No: PVP2020-21232
... by the earlier explanation, the goal of this paper is to present a new methodology to estimate the CTOD using geometrical relationship on crack opening displacement over the crack flank. fracture mechanics CTOD double clip gauge numerical analysis A NEW PROPOSAL TO OBTAIN THE CTOD FRACTURE PARAMETER...
Proceedings Papers

Proc. ASME. PVP2020, Volume 1: Codes and Standards, V001T01A002, August 3, 2020
Paper No: PVP2020-21438
... at the deepest point of semi-elliptical flaws from a plate to those for an OD and ID circumferential flaw in a cylinder to confirm the conservatism of the G 0 coefficients from a plate geometry. crack stress intensity factor fracture mechanics COMPARISON OF STRESS INTENSITY FACTOR COEFFICIENTS...
Proceedings Papers

Proc. ASME. PVP2020, Volume 1: Codes and Standards, V001T01A051, August 3, 2020
Paper No: PVP2020-21455
...) and in the flaw acceptability assessment as well (IWB/IWC-3510-1). flaw characterization FFS codes fracture mechanics extended finite element method TREATMENT OF THE INTERACTION WITH THE FREE SURFACE OF THE COMPONENT FOR COMBINED SUBSURFACE FLAWS: TECHNICAL BASIS FOR REVISION OF IWA- 3300 AND TABLE...
Proceedings Papers

Proc. ASME. PVP2020, Volume 5: High Pressure Technology, V005T05A004, August 3, 2020
Paper No: PVP2020-21534
... related to HE, FEA and Fracture Mechanics (FM) assessments were performed on a stud bolt threaded geometry. Effects of manufacturing tolerances, interface between nut and stud bolt and a defect in the form of a semi-circular crack placed in highest stress location of a thread root were also considered...
Proceedings Papers

Proc. ASME. PVP2020, Volume 5: High Pressure Technology, V005T05A002, August 3, 2020
Paper No: PVP2020-21723
... fracture mechanics life assessment ASME VIII-3 CONTINUED STUDY ON THE EFFECT OF MEAN STRESS ON GROUND STORAGE VESSELS FOR HYDROGEN FUELING Daniel T. Peters1 Structural Integrity Associates Edinboro, PA Myles Parr2 Structural Integrity Associates San Diego, CA ABSTRACT The use of high pressure vessels...
Proceedings Papers

Proc. ASME. PVP2020, Volume 6: Materials and Fabrication, V006T06A102, August 3, 2020
Paper No: PVP2020-21481
... of not less than 16 sub-sized 0.16 C(T) specimens (4 mm thickness) can be manufactured from two tested Charpy sized (10 mm × 10 mm × 55 mm) specimens, allowing a reliable determination of the reference temperature T 0 . Such Charpy sized fracture mechanics specimens are currently widely used in the RPV...
Proceedings Papers

Proc. ASME. PVP2019, Volume 1: Codes and Standards, V001T01A043, July 14–19, 2019
Paper No: PVP2019-93533
...-destructive examination (NDE) methods, fracture mechanics-based minimum pressurization temperature (MPT) envelopes are generated to help guide start-up and shut-down procedures that mitigate the risk for brittle fracture. Practical recommendations are also provided to facilitate the interpretation of NDE...
Proceedings Papers

Proc. ASME. PVP2019, Volume 1: Codes and Standards, V001T01A097, July 14–19, 2019
Paper No: PVP2019-93113
... of forming strain calculations is discussed. Based on experimental data on the impact toughness as a function of forming strain, and fracture mechanics studies on cold formed components, improved guidelines are proposed on cold forming limits for heat treatment. ASME Codes head forming heat treatment...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6A: Materials and Fabrication, V06AT06A008, July 14–19, 2019
Paper No: PVP2019-93165
... evaluates the acceptable sizes of defects in the cast iron insert of canister using fracture mechanics analysis. The submodelling technique of finite element analysis was employed to calculate the fracture behavior of the canister with postulated defects subjected to shear loads due to earthquake. At first...
Proceedings Papers

Proc. ASME. PVP2019, Volume 6A: Materials and Fabrication, V06AT06A044, July 14–19, 2019
Paper No: PVP2019-93564
... water leads to a considerable load at the belt-line area known as Pressurized Thermal Shock (PTS). Usually the assessment against brittle failure is based on a deterministic fracture-mechanics analysis, in which common parameters like J-integral or stress intensity factor are employed to calculate...