.... Another option is to assess NMIs analytically by using linear elastic fracture mechanics under the assumption that NMIs can be analyzed as small cracks. The method presented here is based on orthogonal shear stress distribution and considers short crack behavior as well as the size, shape, and orientation...

... requires the existence of preexisting crack-like defects to initiate unstable cracks. Some steel technologists treat microinclusions as crack-like defects and thus apply fracture mechanics principles in bearing steel quality assurance. However, detail testing of 52100 steel with high metallurgical...

... of the subsurface features at the fracture origin of AlSi10Mg specimens, manufactured by SLM and treated with different surface finish. On the basis of these results, a simple fracture mechanics assessment inside the Kitagawa diagram is proposed, which relies on the size of critical defects and the residual stress...

... of this software is the decrease in the time and resources needed to certify AM structural components exposed to both monotonic and cyclic loading. Keywords additive manufacturing (AM), computational modeling, fatigue, fracture mechanics, structural modeling, microstructure, probabilistic methods Introduction...

... correlation fracture mechanics damage mechanics EVALUATION OF EXISTING AND NEW SENSOR TECHNOLOGIES FOR FATIGUE, FRACTURE AND MECHANICAL TESTING 56 STP 1584, 2015 / available online at www.astm.org / doi: 10.1520/STP158420140052 S. M. Barhli,1 D. Hollis,2 B. Wieneke,2 M. Mostafavi,3 and T. J. Marrow1,4...

... that will allow the user to design piping systems for a desired service life with more accuracy than simply specifying hydrostatic design basis rated resins. stress cracking HDPE test protocol corrugated polyethylene pipe service life fracture mechanics notch ring compression test stress crack...

.... residual stresses cold-working fatigue fracture mechanics weight function stress intensity factors William T. Fujimoto1 Journal of ASTM International, Vol. 3, No. 5 Paper ID JAI12559 Available online at www.astm.org Modeling the Formation and Growth of Cracks from ColdWorked Holes ABSTRACT: First...

... and growth are reviewed. The creep fracture mechanics parameter C * is used to make predictions. The influence of constraint on the mechanisms responsible for void nucleation and growth is considered and creep crack growth rate laws derived. Methods of calculating C * in components from the plastic...

... to creep ductile materials. code of practice fracture mechanics creep crack initiation creep crack growth C * specimen geometry ɳ factor Joumal of ASTM International, February 2006, Vol. 3, No. 2 Paper ID JAI13223 Available online at www.astm.org B. Dogan, 1 U. Ceyhan, 1 K. M. Nikbin, 2 B...

... strain condition correlates best with C * from the global reference stress solution. Consequently the main CCG difference between the C(T) and the pipe component is found to be due to the method of estimating C * and not due to constraint effects. creep crack growth rate fracture mechanics...

... specimen following the ASTM Standard Test Method for Measurement of Creep Crack Growth Rates in Metals (E 1457). Creep crack creep growth rates and initiation times have been correlated with the fracture mechanics parameter C * . The applicability of the stress intensity factor K to describe the creep...

.... fracture mechanics fatigue crack growth threshold stress intensity factor range static fracture mode simulation genetic algorithm Journal of ASTM International, February 2006, Vol. 3, No. 2 Paper ID JAI13195 Available online at www.astm.org Toshiyuki Meshii, l Kemc9 ht9 Isht9hara and Toshiyuki...

... yielding of a typical structure. In this case failure by gross section yielding would occur before fracture. This is demonstrated with the aid of a failure assessment diagram. fracture mechanics reference temperature cleavage HSLA-100 Journal of ASTM International, Vol. 3, No. 5 Paper ID...

..., the effect of crack speed on the driving force, and the evolution of crack tip plasticity during the run-arrest event are discussed. fracture mechanics crack arrest dynamic fracture finite element analysis toughness Richard E. Link, 1Ph.D. Journal of ASTM International, January 2006, Vol. 3...

... strain short crack prediction fracture mechanics Journal ofASTM Intemational, October 2004, Vol. 1, No. 9 Paper ID JAI19063 Available online at www.astm.org Nicolas Gdrard, l Rend Leroy,2 0livier Girard, 2 and Narayanaswami Ranganathan 2 Crack Initiation at a Notch under Constant and Selected...

..., such as free-surface closure, not included in the model. Further study is needed on life predictions under the Mini-TWIST flight spectrum. cracks fatigue fatigue crack growth fracture mechanics stress-intensity factor crack closure plasticity constraint Journal of ASTM International, September...

... successfully predicted FCG lives for contrasting spectra with a common constraint factor, unlike conventional models. fatigue crack growth aluminum alloys crack closure spectrum editing fracture mechanics constraint compression load interaction Journal of ASTM International, September2004, Vol...

... The objective of this paper is to describe the bolted joint analysis method developed and used by LM Aeronautics (named IBOLT) including the theoretical basis, required input, and coupon-level strength-prediction validation. IBOLT performs a fracture-mechanics-based static strength prediction...

..., human reliability analysis, materials embrittlement effects on fracture toughness (crack initiation and arrest), fracture mechanics methodology, and fabrication-induced flaw characterization. The experts have been from the NRC staff, their contractors, and representatives from the nuclear industry...

... In this paper the uncertainties in estimating C * creep fracture mechanics parameter, on component defect assessment, is considered. Comparisons of reference stress σ ref and the stress intensity factor K for a surface cracked plate under tension and bending and a pipe geometry under...