... distribution. It is argued that the cause for the observations are linked to adiabatic heating and local crack arrest that severely influence macroscopic fracture behavior. It is recommended that fracture mechanics testing at elevated loading rates is performed close to or below T 0 in order to minimize...

... components ageing structures AISI 4340 steel brittle fracture ceramics chemical processing plant co-reliability co-reliability-target component co-reliability crack growth rate crack initiation crack propagation cracked pipe failure probability fatigue fracture mechanics gas pipeline glass...

... for the evaluation of the Leakage Rate (LR). With this coupling the Minimum Detectable Crack Length (MDCL) distribution density is calculated. This step sets the boundary conditions for the fracture mechanics assessment of the postulated defect. The main probabilistic outputs from the assessment are the probability...

... at the deepest point of the crack front. This paper shows promising results and concludes there is a significant margin in the fracture mechanics assessment based on material properties obtained by testing highly constrained standard specimens compared to more realistic structural situations. ATLAS...

... 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...

... 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...

... 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...

..., 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...

... 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, these solutions...

... 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-pressure hydrogen...

.... 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 crack...

... assessment 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...

... 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...

... 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...

... 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...

... being considered in all of ASME Section VIII Division 1 and Division 2, and even potentially for Appendix 8 of ASME Section X. Recommendations on updating the ASME codes will be considered in this report. Keywords: hydrogen, ASME, autofrettage, fracture mechanics, life assessment, ASME VIII-3...

... 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...

... criterion but the crack does not propagate in radial direction (G I < G IC ). PTS SIF fracture mechanics LBLOCA TRACE CRACK PROPAGATION MODELING IN A PWR UNDER PTS USING XFEM Diego F. Mora1, Markus Niffenegger1, Roman Mukin2 1Paul Scherrer Institut, Laboratory for Nuclear Materials, CH-5232...

... 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...

... 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 IWB/IWC-3510-1...