... effort used a very thorough probabilistic fracture mechanics (PFM) evaluation to develop a technical basis to increase the PTS screening criteria. The feasibility of applying this same PFM methodology to evaluate normal startup and shutdown operation for both pressurized water reactor (PWR) and boiling...

... is compared with the scale of microstructural heterogeneity. probabilistic fracture mechanics crack growth directionally solidified nickel-base superalloy microstructure Journal of ASTM International, Feb. 2004, Vol. 1, No. 2 Paper ID JAIl 1565 Available online at: www.astrn.org Shelby Highsmith...

... This paper presents a methodology for the use of probabilistic fracture mechanics concepts to estimate the design fatigue life and reliability of structural materials used in superconducting coils and magnet intercoil components of the International Thermonuclear Experimental Reactor (ITER...

... The engineering significance of local brittle zones in multipass, HSLA-80 steel weldments that might be subjected to large strains (such as the straining that occurs during explosive bulge testing) was evaluated through the use of probabilistic fracture mechanics. The heat-affected zone of HSLA...

... A probabilistic fracture mechanics approach for predicting the failure life distribution due to subcritical crack growth is presented. A state-of-the-art crack propagation method is used in a Monte Carlo simulation to generate a distribution of failure lives. The crack growth failure model...

... As a part of the Nuclear Regulatory Commission (NRC) effort to obtain a resolution to the pressurized water reactor (PWR) pressurized-thermal-shock (PTS) issue, a probabilistic approach has been applied that includes a probabilistic fracture-mechanics (PFM) analysis. The PFM analysis...

... size (EIFS) crack size distribution crack exceedance probability stochastic crack growth probabilistic fracture mechanics initial fatigue quality (IFQ) time-to-crack initiation (TTCI) Jann N. Yang,^ Sherrell D. Manning,^ and James L. RudcP Evaluation of a Stochastic Initial Fatigue Quality...

... this analysis, it is concluded that this safety margin is considerable. Depending upon the conditions considered to be realistic in practice, the margin could be upwards of 10 or more orders of magnitude. probabilistic fracture mechanics conservatisms test simulation safety factor stress intensity...

... A probabilistic fracture mechanics model of structural reliability is described that considers failure to occur as the result of subcritical and catastrophic growth of pre-existing cracks that escape detection. The model considers cracks to be two-dimensional and is capable of treating many...

... The use of probabilistic fracture mechanics to assess the reliability of engineering structures requires knowledge about the statistical scatter of the parameters used in the models. A review is given of the statistically defined tanh reference toughness curves. This method is then used to aid...

... processing and inspection criteria to be based on required component life. fracture mechanics probabilistic fracture mechanics fatigue (materials) cyclic crack growth defect size stress intensity factor scatter size effect Weibull distribution fatigue crack growth G. G. Trantina^ and C...

... detection crack detection reliability inspection reliability probabilistic fracture mechanics fatigue (materials) fatigue crack growth fracture mechanics A. P. Berens^ and P. W. Hovey^ Statistical IVIethods for Estimating Crack Detection Probabilities REFERENCE: Berens, A. P. and Hovey, P. W...

.... fatigue (materials) fatigue crack growth statistical analysis data analysis variability probabilistic fracture mechanics fracture mechanics D. F. Ostergaard^ and B. M. Hillberty^ Characterization of the Variability in Fatigue Crack Propagation Data REFERENCE: Ostergaard, D. F. and Hillberry, B. M...

... than limit load capability. Interrelationships between these model elements are explored through selected quantified examples. Some resulting internal relationships and trends are discussed. aircraft inspections cracks probabilities fatigue (materials) probabilistic fracture mechanics...

... and maintainability of a component of a structure. cumulative damage reliability maintainability fatigue failure fatigue (materials) service inspection replacement policy stochastic process mathematical model probabilistic fracture mechanics fatigue crack growth fracture mechanics F. Kozin^ and J...

... exposure and variations in inspection effectiveness and inspection period length are demonstrated. failure probability spectrum loading crack growth initial equivalent flaw distribution periodic inspection effects fatigue (materials) fracture mechanics probabilistic fracture mechanics C. E...

..., to a specified failure probability. fatigue (materials) reliability fracture mechanics bridges steel probabilistic fracture mechanics Pedro Albrecht^ S-N Fatigue Reliability Analysis of Highway Bridges REFERENCE: Albrecht, P., "S-N Fatigue ReUabilJty Analysis of Highway Bridges," Probabilistic...

... life criteria crack size distribution time-to-crack initiation (TTCI) equivalent initial flaw size (EIFS) crack growth small crack sizes initial quality probabilistic fracture mechanics probability of crack exceedance /. L. Rudd,l J. N. Yang,2 S. D. Manning,3 and W. R. Garver3 Durability...

... lead to extremely conservative designs which may be economically unacceptable. Probabilistic fracture mechanics methods have been developed which incorporate the statistical variations or uncertainties that actually exist and establish a more realistic quantitative basis for design allowables...