Proposition of a finite element-based approach to compute the size effect in fretting fatigue

Bernardo, Alexander; Araújo, J.A.; Mamiya, E.N.

doi:10.1016/j.triboint.2006.02.028

Cited by 11 publications

(7 citation statements)

References 21 publications

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“…But due to the possible drastic reduction of the fatigue limit induced by fretting [7], a great part of the work has been devoted to determining the fretting crack initiation conditions in various types of materials [8,9,10]. This process is quite complex due to high stress and strain gradients, oxidation phenomena and other tribological phenomenon (TTS formation [11]), surface deformation and wear, and debris formation.…”

Section: Introductionmentioning

confidence: 99%

“…Until now the main method used to describe quantitatively crack nucleation deals only with the mechanical state under the fretting conditions and relies on computing a multiaxial fatigue criterion (this was first attempted by Petiot et al [12]). This can be done either by using analytical solutions of the stress/strain state under fretting contact (as it can be found in [13]), or more recently by numerous author with finite elements [10,14,15]. The latter method is more constrained but allows one to test * Electronic address: henry.proudhon@ec-lyon.fr † Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

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Determination and prediction of the fretting crack initiation: introduction of the (P, Q, N) representation and definition of a variable process volume

Proudhon¹,

Fouvry²,

Yantio³

2006

International Journal of Fatigue

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In this work, the crack nucleation under fretting loading is investigated experimentally with a damage tolerant 2024 aluminium alloy. A new method is introduced to determine its condition with respect to all loading parameters including the number of fretting cycles. Further work deals with the prediction of this threshold using the Smith-Watson-Topper criterion. New developments are presented, in particular a process volume of variable size is introduced in the computations of the fretting crack initiation. PACS numbers: 62.20Mk, 62.20Qp

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination and prediction of the fretting crack initiation: introduction of the (P, Q, N) representation and definition of a variable process volume

Proudhon¹,

Fouvry²,

Yantio³

2006

International Journal of Fatigue

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“…Thus, non-local methods are more appropriate for life prediction in the presence of high stress gradients, such as the ones existing in fretting fatigue contacts [12][13][14][15]. The theory of critical distances (TCD) [16] is the name given to a group of methods and has been one of the most widely used non-local approaches over the last decade, and was introduced in the fretting literature [17,18] to predict notch fatigue effects or those caused by stress concentrators.…”

Section: Introductionmentioning

confidence: 99%

On the use of the theory of critical distances with mesh control for fretting fatigue lifetime assessment

Zabala

Infante-García

Giner

et al. 2020

Tribology International

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This work analyses the viability of the theory of critical distances (TCD) using mesh control for fretting fatigue lifetime assessment. More than seven hundred sets of simulations were performed by taking seventy different experimental tests reported previously in the literature. The outcome of the present study suggests that the TCD mesh control method can be extended to fretting fatigue problems by the reasonable assumption of setting the right element size proportional to critical distance. In this study, a significant computational time reduction of up to 97% was obtained. Thus, this study provides a simple method to design complex 3D industrial components subjected to fretting fatigue phenomena using finite element analysis efficiently without requiring complex remeshing techniques.

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“…Sabelkin and Mall (2005) included the compliance of fretting texture and allowed the application of bending moment on the pad by adding a set of springs on the top of the fretting pad. Bernardo et al (2006) used a 2D finite element based methodology able to predict the pad size effect on the specimen life. The suggested model provides a direct evaluation of the fatigue strength at nodal points along with the stress/strain distribution results, and they showed that for fretting fatigue problems the stress state should be extracted using a process zone approach rather than in a single point.…”

Section: 14iii Fretting Fatiguementioning

confidence: 99%

“….19:Bernardo et al (2006) finite element mesh. non-uniform friction distribution in the contact zone of their finite element model.…”

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confidence: 99%

Stress gradients in fretting fatigue

Bellecave¹

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This thesis is part of an international research program (IRG Cognac) initiated by the engine manufacturer SNECMA (SAFRAN group) involving ENS Cachan, UnB, ENSMA, CNRS, Snecma, Turbomeca et Messier Bugatti Dowty. The thesis focuses on the effect of a stress gradient in fretting fatigue. Fretting-fatigue refers to the damage process localized at the frontier of the contact between two contacting bodies subjected to fatigue loadings. The prediction of this phenomenon is of major importance in determining, for instance, the lifetime of fan's disc. In the vicinity of the contact front, the stress field inherited from the contact loads is maximal at the surface and displays a strong gradient from the surface. It was shown in this thesis, for a TA64V alloy, that local approaches, based on local stresses at the most critical point, are not appropriate to predict fretting fatigue lives. As a matter of fact, short cracks initiated at the most critical point may stop if the stress decay from the surface is strong enough or may continue their growth, up to the failure of the component, if the stress gradient from the surface is not string enough. A second difficulty is the multiaxial and non-proportional nature of the loading conditions. Fatigue-fretting stems from the combination of loads that have neither the same spatial distribution nor the same time-dependency. In fretting-fatigue tests, three loading components are considered, the fatigue loading of the component (cyclic), the normal part (assumed to be constant) and the in-plane part (cyclic) of the loads between the two contacting components. To quantify the effect of the stress gradient, tests were carried out on a fatigue testing contact bench developed at the University of Brasilia, with experimental conditions ensuring different stress gradient while keeping the maximal stress the same. Damage mechanisms were studied using post-mortem analysis and optical microscopy on the contact elements tested. The prediction of the fretting fatigue life was done using different approaches. The first one is based on the Critical Distance Method and a fatigue criterion. The second is based on a K-based short crack arrest method. Finally, a new criterion was proposed. This method considers a generalized von Mises yield criterion for the crack tip region and accounts for the T-stresses in the asymptotic LEFM development. 4 Remerciements -Agradecimentos -Acknowledgements Avant tout autre chose, je souhaiterais remercier Jean Mériaux, Sylvie Pommier et Alex Araújo qui ont suivi et dirigé ma thèse. Merci pour leur confiance, leur patience et leur ténacité. Au delà de leurs compétences scientifiques reconnues. Je remercie l'ANRT et SNECMA (Groupe SAFRAN) pour le cofinancement de ma thèse. Et je remercieégalement Fabienne Fong pour son soutien et son aide. Me arriscarei no português para agradecer as pessoas que marcaram a minha estadia no Brasil. Obrigado a Jordana Peixoto, Julia Ayla, Patricia Vitorino, Elissa Massote, Guillaume Tessier, Wallison Martins e todos os outros. Graças a...

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Proposition of a finite element-based approach to compute the size effect in fretting fatigue

Cited by 11 publications

References 21 publications

Determination and prediction of the fretting crack initiation: introduction of the (P, Q, N) representation and definition of a variable process volume

Determination and prediction of the fretting crack initiation: introduction of the (P, Q, N) representation and definition of a variable process volume

On the use of the theory of critical distances with mesh control for fretting fatigue lifetime assessment

Stress gradients in fretting fatigue

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