A comparison of methods for calculating notch tip strains and stresses under multiaxial loading

Lutovinov, Maxim; erný, J.; Papuga, Jan

doi:10.3221/igf-esis.38.32

Cited by 13 publications

(4 citation statements)

References 5 publications

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“…33 It is worth noting that the accurate extraction of the local stress-strain response at the notch root is the vital step of this method. 20 Until now, three strategies are commonly used to obtain the stress-strain histories at the notch root 34 : the experimental approaches, elasto-plastic FEA, and approximate calculation approaches. Among them, the experimental approaches can present objective and precise stress-strain relationships.…”

Section: Local Stress-strain Approachesmentioning

confidence: 99%

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Recent advances on notch effects in metal fatigue: A review

Liao

Zhu

Correia

et al. 2020

Fatigue Fract Eng Mat Struct

173

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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%

“…Until now, three strategies are commonly used to obtain the stress‐strain histories at the notch root: the experimental approaches, elasto‐plastic FEA, and approximate calculation approaches. Among them, the experimental approaches can present objective and precise stress‐strain relationships.…”

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

173

View full text Add to dashboard Cite

show abstract

“…Therefore, this group of methods is not suitable for cyclic loading. The investigation of these methods can be found in [6].…”

Section: Introductionmentioning

confidence: 99%

An Approximate Method for Calculating Elastic–Plastic Stress and Strain on Notched Specimens

et al. 2022

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The paper deals with an approximate method for calculating elastic–plastic stresses and strains on the surface of notched samples. The method is based on the Abdel–Karim–Ohno cyclic plasticity model. The plane stress condition is considered within the evaluation. The output of the approximation on several multiaxial axial–torsion load paths is compared to our own experimental results. Experiments were carried out on samples of two notch types manufactured from the 2124-T851 aluminum alloy. Strain distribution in the notch area was measured by digital image correlation. The comparison between computational solution and measured response shows that the new method allows for obtaining reasonably good approximation, even for relatively complicated multiaxial load cases.

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“…The H‐S scheme has been recently validated on C–Mn steel for plane stress and plane strain conditions subjected to uniaxial loading 35 . Lutovinov et al 36 compared the notch tip stress/strain using H‐S scheme with elastic–plastic FE results for proportional loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Validation of notch stress estimation schemes for low C–Mn steel

Jena

Arora

Gupta

et al. 2022

Fatigue Fract Eng Mat Struct

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The present study is aimed at validation of notch stress/strain estimation schemes such as classical Neuber, Hoffmann–Seeger, and recently developed Ince–Glinka method for nuclear piping material (low C–Mn steel). The study has considered different constraints, loading conditions, and various hole sizes to accommodate strain gradient variations and equivalent peak strains. The notch stress field evaluated using these schemes is compared with corresponding stress using elastic–plastic finite element (FE) analyses. The comparisons have brought out that the Hoffmann–Seeger scheme results in reasonably accurate assessment of stress localization nearly for all constraint geometries, loadings, and strain gradients. However, the classical Neuber scheme is more suitable for low constraint geometries and intermediate constraint geometries, whereas it results in underestimation of maximum principal stress for high constraint geometries, thereby leading to overprediction of fatigue life. Further, the suitability of energy equivalence equations of Ince–Glinka model for individual stress components has been reviewed.

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A comparison of methods for calculating notch tip strains and stresses under multiaxial loading

Cited by 13 publications

References 5 publications

Recent advances on notch effects in metal fatigue: A review

Recent advances on notch effects in metal fatigue: A review

An Approximate Method for Calculating Elastic–Plastic Stress and Strain on Notched Specimens

Validation of notch stress estimation schemes for low C–Mn steel

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