... initiation, crack propagation, nonmetallic inclusions, oxides, hot isostatic pressing Introduction Recently, various machine units tend to be downsized for the solution of the global warming issue. Thus the improvement of life and reliability has been demanded by bearings. Under a situation like...

..., the inhomogeneous microstructure strongly affects the crack propagation behavior in such a structure. The authors investigate the effect of microstructural inhomogeneity on crack propagation morphology and crack propagation rate ( da / dN ) under a creep-fatigue condition. The macroscopic direction of the main...

... and storage of discharged fuel. A number of test techniques are available that approximate the stress-state experienced by the cladding for crack initiation and propagation in the axial direction ( z ) and thus provide a measure of the crack propagation resistance. However, the classical fracture mechanics...

...FR Biglari; A Rezaeinasab; K Nikbin; I Sattarifar Simulation of the crack growth for complex geometries is presented in this paper. Determination of the crack propagation direction under mixed mode conditions is one of the most important parameters in fracture mechanics. There are several criteria...

... rmed that a circumferentially cracked tube specimen could produce valid fatigue crack growth rate data. KEYWORDS: steam generator, tube, fatigue, crack propagation, crack growth rate, specimen geometry, potential drop, stress intensity Nomenclature CGRair Crack growth rate in air length/time CGRenv...

... , Vol. 7 , No. 2 , 1975 , pp. 235 - 247 . 2003-11-19 - 2003-11-21 Fatigue and Fracture Mechanics: 34th Volume fatigue fatigue threshold crack propagation effective stress intensity crack closure residual stress adjusted compliance ratio 13 12 2003 05 04 2005 08...

..., with regions in the interior opening prior to regions near the free surface. 17 11 2003 27 08 2004 01 06 2005 fatigue crack propagation threshold crack closure 2003-11-19 - 2003-11-21 Fatigue and Fracture Mechanics: 34th Volume References Doker , H. , Bachmann , V...

... crack propagation behavior in the residual stress field reported by Glinka was also examined from the ΔK point of view. In this paper, the effect of residual stress on the fatigue crack propagation rate is considered to be the effect of varying mean stress. The concept of ΔKeff, where the effect...

... technique (TOFD). The analysis is done by a sequentially coupled thermal-stress finite element analysis using a cyclic plasticity model. Predictions of the crack initiation life (based on crack initiation curves as well as crack propagation models for microstructurally short cracks) are in good agreement...

...F Mueller; A Scholz; C Berger High temperature components with notches, defects, and flaws can introduce crack initiation and crack propagation under service conditions. Fracture mechanics procedures are needed to study crack problems and to support an advanced remnant life evaluation. Since a more...

... distribution were heavily dependent on the threshold value. With the appropriate value of crack growth threshold, good correlation with variability can be made without requiring fatigue testing, particularly for the more critical shorter lives. KEYWORDS: fatigue, variability, crack propagation, inclusions...