Analyse der Wirkung von Kerben, Mittel‐ und Eigenspannungen auf die Schwingfestigkeit des hochumgeformten Werkstoffbereichs von Spaltprofilen

Landersheim, Volker; Eigenmann, Bernd; Dsoki, Chalid el; Bruder, Thomas; Sonsino, Cetin Morris; Hanselka, Holger

doi:10.1002/mawe.200900520

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…In order to estimate the fatigue life of residual stress affected components, mainly two types of models are used. Empirical concepts based on Wöhler curves mostly evaluate the fatigue life until crack initiation and often treat residual stresses as mean stresses [18]. For the remaining fatigue life during crack growth, models based on fracture mechanics are often used.…”

Section: Introductionmentioning

confidence: 99%

Phase-field modelling for fatigue crack growth under laser-shock-peening-induced residual stresses

Seiler,

Keller,

Kashaev

et al. 2020

Preprint

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For the fatigue life of thin-walled components, not only fatigue crack initiation, but also crack growth is decisive. The phase-field method for fracture is a powerful tool to simulate arbitrary crack phenomena. Recently, it has been applied to fatigue fracture. Those models pose an alternative to classical fracturemechanical approaches for fatigue life estimation. In the first part of this paper, the parameters of a phasefield fatigue model are calibrated and its predictions are compared to results of fatigue crack growth experiments of aluminium sheet material. In the second part, compressive residual stresses are introduced into the components with the help of laser shock peening. It is shown that those residual stresses influence the crack growth rate by retarding and accelerating the crack. In order to study these fatigue mechanisms numerically, a simple strategy to incorporate residual stresses in the phase-field fatigue model is presented and tested with experiments. The study shows that the approach can reproduce the effects of the residual stresses on the crack growth rate.

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Section: Introductionmentioning

confidence: 99%

Phase-field modelling for fatigue crack growth under laser-shock-peening-induced residual stresses

Seiler,

Keller,

Kashaev

et al. 2020

Preprint

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“…Through several steps flanges are being produced, leading to profiles with a double-Y shape. Owing to the severe strains and the complex forming conditions high residual stresses develop within the flanges of the profiles [2]. The material flow during LFS is perpendicular to the feed direction.…”

Section: Introductionmentioning

confidence: 99%

Influence of Gradients in the Elastic Anisotropy on the Reliability of Residual Stresses Determined by the Hole Drilling Method

Niehuesbernd

Bruder

Müller

2014

AMR

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Metal forming processes often involve large strain gradients which results in heterogeneous deformation and consequently residual stresses. Furthermore the strain gradients also generate variations in the deformation texture and related properties. For materials with a significant crystallographic elastic anisotropy such as ferritic steel, these textures may have a substantial effect on the reliability of the determination of residual stresses. In the present investigation this influence is examined for the hole drilling method by a combination of experiments and finite element simulations.

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“…In order to estimate the fatigue life of residual stress-affected components, mainly two types of models are used. Empirical concepts based on Wöhler curves mostly evaluate the fatigue life until crack initiation and often treat residual stresses as mean stresses [19]. For the remaining fatigue life during crack growth, models based on fracture mechanics are often used.…”

mentioning

confidence: 99%

Phase-field modelling for fatigue crack growth under laser shock peening-induced residual stresses

et al. 2021

View full text Add to dashboard Cite

For the fatigue life of thin-walled components, not only fatigue crack initiation, but also crack growth is decisive. The phase-field method for fracture is a powerful tool to simulate arbitrary crack phenomena. Recently, it has been applied to fatigue fracture. Those models pose an alternative to classical fracture-mechanical approaches for fatigue life estimation. In the first part of this paper, the parameters of a phase-field fatigue model are calibrated and its predictions are compared to results of fatigue crack growth experiments of aluminium sheet material. In the second part, compressive residual stresses are introduced into the components with the help of laser shock peening. It is shown that those residual stresses influence the crack growth rate by retarding and accelerating the crack. In order to study these fatigue mechanisms numerically, a simple strategy to incorporate residual stresses in the phase-field fatigue model is presented and tested with experiments. The study shows that the approach can reproduce the effects of the residual stresses on the crack growth rate.

show abstract

Analyse der Wirkung von Kerben, Mittel‐ und Eigenspannungen auf die Schwingfestigkeit des hochumgeformten Werkstoffbereichs von Spaltprofilen

Cited by 5 publications

References 8 publications

Phase-field modelling for fatigue crack growth under laser-shock-peening-induced residual stresses

Phase-field modelling for fatigue crack growth under laser-shock-peening-induced residual stresses

Influence of Gradients in the Elastic Anisotropy on the Reliability of Residual Stresses Determined by the Hole Drilling Method

Phase-field modelling for fatigue crack growth under laser shock peening-induced residual stresses

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