Application of local stress–strain approaches in the prediction of fatigue crack initiation life for cyclically non-stabilized and non-Masing steel

Lim, Jae-Yong; Hong, Seongwon; Lee, Soon-Bok

doi:10.1016/j.ijfatigue.2005.07.014

Cited by 32 publications

(12 citation statements)

References 17 publications

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“…On the basis of the research performed by Moftakhar et al and Glinka et al, Singh et al and Lim et al developed the incremental forms of the Neuber and the ESED rules, respectively (see Figures and ), which can serve for stress/strain calculation under nonproportional loading conditions.…”

Section: Local Stress‐strain Approachesmentioning

confidence: 99%

Recent advances on notch effects in metal fatigue: A review

Liao

Zhu

Correia

et al. 2020

Fatigue Fract Eng Mat Struct

175

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Notch features including holes, fillets, shoulders, and grooves commonly exist in engineering components. When subjected to external loads, these geometrical discontinuities generally act as stress raisers and thus present significant influences on the component strength and life, which are more remarkable under complex loading paths. Accordingly, numerous theories and approaches have been developed to address notch effects in metal fatigue as well as damage modelling and life predictions, which aim to provide theoretical support for structural optimal design and integrity evaluation. However, most of them are self‐styled or focus on specific objects, which limits their engineering applicability. This review recalls recent developments and achievements in notch fatigue modelling and analysis of metals. In particular, four commonly used methods for fatigue evaluation of metallic notched components/structures are summarized and elaborated, namely, nominal stress approaches, local stress‐strain approaches, and critical distance theories and weighting control parameters‐based approaches, which intend to provide a reference for further research on notch fatigue analysis and promote the integration and/or development among different approaches for practice.

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Section: Local Stress‐strain Approachesmentioning

confidence: 99%

Recent advances on notch effects in metal fatigue: A review

Liao

Zhu

Correia

et al. 2020

Fatigue Fract Eng Mat Struct

175

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“…A wide range of assumptions has been proposed in the context of the extension of fast energetic methods to multiaxial stress state at stress concentration points such as notches (Walker, 1977;Chaudonneret and Culie, 1985;Hoffmann and Seeger, 1985;Moftakhar et al, 1995;Singh et al, 1996;Gallerneau, 2000;Knop et al, 2000;Buczynski and Glinka, 2003;Sethuraman and Viswanadha Gupta, 2004;Lim et al, 2005;Chaboche, 2007;Herbland et al, 2007;Ye et al, 2008). They equal elastic and elastoplastic stress, strain, or mixed ratios, i.e.…”

Section: Existing Multiaxiality Assumptions Linking Elastic and Elastmentioning

confidence: 99%

Stress triaxiality and Lode angle along surfaces of elastoplastic structures

Darlet

Desmorat

2015

International Journal of Solids and Structures

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a b s t r a c tExpressions for the stress triaxiality and the Lode angle along surfaces of elastoplastic structures are established in case of monotonic loading. The stress triaxiality is shown to be governed by the accumulated plastic strain when traction free boundary condition is considered. The exact expressions obtained are generalized to any loading thanks to the proposal of a multiaxiality rule or heuristics whose two parameters are determined from elastic computations of the structure considered: a first one with the elastic properties of the material, a second one quasi-incompressible. The multiaxiality rule proposed can then deal with both plane strain and plane stress conditions. The stress triaxiality at the surface is shown related to the Lode angle. The corresponding expressions are validated on different structures and loadings. Finally, two applications are presented: the enhancement of energetic methods for plasticity post-processing and the enhancement of homogenization localization laws.

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“…To apply this approach, the strain and stress at the critical notch must be determined. Estimation of the notch tip stress-strain of the material, Neuber's rule or Glinka's methods were used in general [9]. In this study, stress and strain values were obtained using the Neuber relationship.…”

Section: Fatigue Life Predictionsmentioning

confidence: 99%

Notch Behavior and Fatigue Life Predictions of Discontinuously Reinforced MMCs

Uygur¹

2011

Archives of Metallurgy and Materials

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In this study, three notch geometries were assessed with different stress concentration factors. The severity of a notch increased with the stress concentration, hence the fatigue lives dramatically reduced due to increasing stress concentration factor. Fatigue life predictions for the notch geometries have been performed by using a critical strain life approach. It is shown that the model provides a reasonable fatigue life estimation for various notch geometries, volume fraction, and reinforcement particle size of the Al metal matrix composites. Typical crack initiation sites related with the particle clusters, large particles, and intermetallic particles. Although, crack propagation in the reinforced alloy occurred predominantly in the matrix material, SiC particles (SiC p ) played a significant role in influencing the crack path.Keywords: MMCs, Fatigue, life prediction, notch behavior W pracy, badano trzy geoemetrie karbu w powiązaniu z różnymi współczynnikami koncentracji naprężeń. Wielkość pęknięcia rosła z koncentracją naprężeń, a tym samym wytrzymałość zmęczeniowa była drastycznie obniżona ze względu na zwiększony współczynnik koncentracji naprężeń. Przewidywania trwałości zmęczeniowej dla różnych geometrii karbu zostały wykonane przy użyciu krytycznego czasu odkształcenia. Pokazano, że model umożliwia wystarczające szacowanie trwało-ści zmęczeniowej dla różnych geometrii karbu, frakcja objętości, i wielkości cząstek zbrojenia aluminiowych kompozytów metalowo-ceramicznych. Typowe miejsca inicjacji pęknięcia związane były z klastrami cząstek, dużymi cząstkami, i cząstkami intermetalików. Pomimo, że pęknięcia w kompozycie miały miejsce głównie w materiale matrycy, cząsteczki (SiC p ) odegrały znaczną rolę w kształtowaniu ścieżki pęknięcia.

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Application of local stress–strain approaches in the prediction of fatigue crack initiation life for cyclically non-stabilized and non-Masing steel

Cited by 32 publications

References 17 publications

Recent advances on notch effects in metal fatigue: A review

Recent advances on notch effects in metal fatigue: A review

Stress triaxiality and Lode angle along surfaces of elastoplastic structures

Notch Behavior and Fatigue Life Predictions of Discontinuously Reinforced MMCs

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