Analysis of the stress gradient effect in fretting-fatigue through nonlocal intensity factors

Montebello, Claudio; Pommier, Sylvie; Demmou, Karim; Leroux, Julien; Meriaux, J.

doi:10.1016/j.ijfatigue.2015.02.009

Cited by 17 publications

(18 citation statements)

References 29 publications

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“…A cylinder-plain contact configuration is employed. This choice is driven by the fact that the numerical procedure is validated by comparing it with experimental tests [9][10][11], carried out with a cylinder-plain apparatus. In other word the FE model needs to be as close as possible to the experimental setting.…”

Section: T I T D X I T D X I T D Xmentioning

confidence: 99%

“…ds is selected as the field generated by a ΔP, while da as the one produced by a ΔQ in a situation where all the contact surface is in a stick condition. Further details of the procedure followed can be found in [9]. By expressing the reference fields in polar coordinates, their radial and tangential evolution with respect to the crack tip can be obtained.…”

Section: T I T D X I T D X I T D Xmentioning

confidence: 99%

“…By contrast with the elastic reference fields, here the intensity decreases quickly far from the contact confirming the extremely localized effect of friction. The error introduced by the approximation can be defined as follows: (9) where  e is the error introduced considering just the elastic approximation while in  t all the terms presented in Eq. (1) are taken into account.…”

Section: T I T D X I T D Xmentioning

confidence: 99%

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Multi-scale approach for the analysis of the stress fields at a contact edge in fretting fatigue conditions with a crack analogue approach

Montebello¹,

Pommier²,

Demmou³

et al. 2015

Frattura Ed Integrità Strutturale

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This paper describes a novel method to model the stress gradient effect in fretting-fatigue. The analysis of the mechanical fields in the proximity of the contact edges allows to extract nonlocal intensity factors that take into account the stress gradient evolution. For this purpose, the kinetic field around the contact ends is partitioned into a summation of multiple terms, each one expressed as the product between nonlocal intensity factors, Is, Ia, Ic, depending on the macroscopic loads applied to the mechanical assembly, and spatial reference fields, ds, da, dc, depending on the local geometry of the part. This description is obtained through nonintrusive post-processing of FE computation and is conceived in order to be easily implementable in the industrial context. By using as input the macroscopic load, the procedure consists in computing a set of nonlocal stress intensity factors, which are an index of the severity of the stress field in the proximity of the contact edges. This description has two main advantages. First, the nonlocal stress intensity factors are independent from the geometry used. Secondly, the procedure is easily applicable to industrial scale FE model..

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Section: T I T D X I T D X I T D Xmentioning

confidence: 99%

Section: T I T D X I T D X I T D Xmentioning

confidence: 99%

Section: T I T D X I T D Xmentioning

confidence: 99%

See 1 more Smart Citation

Multi-scale approach for the analysis of the stress fields at a contact edge in fretting fatigue conditions with a crack analogue approach

Montebello¹,

Pommier²,

Demmou³

et al. 2015

Frattura Ed Integrità Strutturale

Self Cite

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show abstract

“…It makes the problem extremely expensive. In this work, a new methodology to describe the mechanical fields close to the contact edges through a crack analogy approach [3] will be used to enrich fretting simulations performed on coarse meshes. The enrichment technique used here is the X-FEM, taking advantage of the similarity found to describe the mechanical fields around the contact edges in fretting problems with the ones found in linear elastic fracture mechanics problems around the crack tip.…”

Section: Introductionmentioning

confidence: 99%

An enrichment-based approach for the simulation of fretting problems

et al. 2018

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In this work a new numerical strategy will be assessed to evaluate the fretting problem under cylindrical contact conditions. For that purpose, a methodology introduced recently to describe the mechanical fields in the proximity of the contact edges will be used to enrich fretting simulations using the X-FEM. This strategy is expected to represent a breakthrough concerning the solution of this kind of contact problems, once that it permits to perform fretting simulations with coarser meshes facilitating the implementation in an industrial context.

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“…The interest of this approach, developed by Montebello [7] is shown in Fig. 2 where the description of the crack initiation boundaries through non-local intensity factors shows a unique threshold.…”

Section: Introductionmentioning

confidence: 99%

A novel approach to predict fretting fatigue crack initiation

et al. 2018

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Abstract. This paper proposes a simplified approximation of the velocity fields close to the contact edge using non-local intensity factors and reference fields. This non-local description is not affected by size or gradient effects and leads to unique crack initiation boundaries. Linear intensity factor represents the contribution of the elastic field on the total one and can be determined thanks to the macroscopic load even with coarse mesh. While the complementary intensity factor describes the friction effect and is proportional to the size of the partial slip zone. The prediction of using through an incremental approach allows to predict the velocity fields for complex loadings and can be used to set up criteria to predict crack initiation.

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Analysis of the stress gradient effect in fretting-fatigue through nonlocal intensity factors

Cited by 17 publications

References 29 publications

Multi-scale approach for the analysis of the stress fields at a contact edge in fretting fatigue conditions with a crack analogue approach

Multi-scale approach for the analysis of the stress fields at a contact edge in fretting fatigue conditions with a crack analogue approach

An enrichment-based approach for the simulation of fretting problems

A novel approach to predict fretting fatigue crack initiation

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