Stéphanie Basseville

Université de Versailles Saint-Quentin, Versailles, Île-de-France, France

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Publications (18)14.04 Total impact

  • Stéphanie Basseville · Georges Cailletaud
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    ABSTRACT: The fretting process can lead to material removal (wear), nucleation and propagation of cracks (fatigue), or both. In the first step, the aim of the present paper is to investigate the influence of non linear behaviour on the wear profiles, in order to evaluate the role of plasticity under different slip regimes for a cylinder-on-flat contact fretting wear. The material of the study is a classical titanium alloy, Ti–6Al–4 V (noted TA6V in the following) that is represented by a von Mises equivalent stress, and a combination of non linear kinematic hardening and isotropic hardening. Since wear is not the only damage mechanism, crack propagation is also considered in the second step. The competition between wear and crack initiation is investigated, thanks to two types of fatigue criteria, purely stress dependent models (Dang Van and Crossland), and a stress-strain dependent fatigue model (Smith-Watson-Topper). The contact evolution influences fretting crack nucleation. The objective is to determine the relevant fatigue criterion and compare the numerical results to the experimental fretting map.
    No preview · Article · Mar 2015 · Wear
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    Yoann Guilhem · Stéphanie Basseville · Henry Proudhon · Georges Cailletaud
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    ABSTRACT: The surface state of mechanical components differs according to applied loadings. Industrial processes may produce specific features at the surface, such as roughness, local hardening, residual stresses or recrystallization. Under fatigue loading, all these parameters will affect the component lifetime, but in different manner. A better understanding of each surface state parameter, separately first and then all combined, will provide a better prediction of fatigue life. The study focuses on the effect of surface roughness. Crystal plasticity finite element computations have been carried out on three-dimensional polycrystalline aggregates with different roughness levels. Local mechanical fields have been analyzed both at the surface and inside the bulk to highlight the competition between crystallography and roughness to impose localization patterns. As soon as surface roughness is strong enough, classical localization bands driven by grains orientation are replaced by localizations patterns driven by the local roughness topology. Nevertheless, this effect tends to decrease gradually under the surface, and it becomes usually negligible after the first layer of grains. The discussion allows us to characterize the influence of the surface state on the local mechanical fields.
    Full-text · Conference Paper · Jun 2014
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    ABSTRACT: The influence of porosity on the wear behaviour of a reactive plasma spray Ti-6Al-4V/TiN coating is investigated through a comparison between experimental results and numerical simulations by finite elements. Samples have been coated using optimized plasma spray conditions and then tested in linear reciprocating sliding against a Ti-6Al-4V ball under different normal loads and number of cycles. Wear tracks were investigated using a combination of scanning electron microscopy, wavelength dispersive spectroscopy and profilometry to assess friction and wear mechanisms. Finite element analysis of the wear problem has been tackled with an iterative 2D model using remeshing to simulate wear and including some of the microstructural features of the coating such as the actual porosity shape and size distribution. Finite elements simulations are able to reproduce the wear kinetics observed experimentally. In addition both experimental and numerical analysis reveal that pores within the coating layer may represent weak points for the wear resistance.
    Full-text · Article · Mar 2014 · Wear
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    Yoann Guilhem · Stéphanie Basseville · Henry Proudhon · Georges Cailletaud

    Full-text · Article · Aug 2013
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    Full-text · Article · Aug 2013
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    Full-text · Article · May 2013
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    ABSTRACT: The aim of the present paper is to investigate the consequences of the loading on the free surface response in polycrystalline aggregates. The study is made on a 316L stainless steel. Finite element computations using a crystal plasticity model are performed to simulate a polycrystalline aggregate submitted to different cyclic loadings. A statistical analysis of the results is carried out to extract information concerning the local stress and local strain fields at the free surface. The analysis of plastic strain localization on surface maps and inside the bulk through transparent volumetric views allows to exhibit the effects of the grain orientation and of the loading on local mechanical fields. The computation of an indicator characterizing extrusion/intrusion steps give some information on the initiation sites.
    Full-text · Article · Apr 2013 · Computational Materials Science
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    ABSTRACT: Fatigue crack initiation is classically predicted by macroscopic models, where the critical variables are combinations of macroscopic stress and strain. Nevertheless, the local mechanisms responsible for crack initiation in metals and alloys are persistent slip bands (PSB), which develop on a microscale, in each grain. Having in view a better understanding of the local mechanisms, the purpose of this work is to get an improved knowledge of the local stress and strain fields and to examine the result obtained by using the relevant variables in local crack initiation models.
    Full-text · Conference Paper · Jan 2013
  • Stéphanie Basseville · Henry Proudhon · Eva Héripré · Georges Cailletaud

    No preview · Article · Jan 2013 · Matériaux & Techniques
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    ABSTRACT: Contact zones are places in structures where the stress and stress fields are very heterogeneous. For the case of metal-metal contacts that is studied here, the size of the macroscopic contact zones is generally small, so that the gradients are very large. The many theoretical solutions that have been developed in the path for a series of problems, most of them in the framework of an elastic behaviour, are fully acceptable to determine global responses. Nevertheless, authors' opinion is that they are limited to explain damage mechanisms, that are very local phenomena. As a consequence, it is important to develop a new class of approach, based on a fine description of the contact geometry and of the material properties. Three topics are presented here: contact against a rough surface, wear description and crystal plasticity in fatigue-fretting.
    No preview · Article · Aug 2012
  • Stéphanie Basseville · Georges Cailletaud

    No preview · Article · May 2012
  • Stéphanie Basseville · Eva Héripré · Georges Cailletaud
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    ABSTRACT: This study is devoted to the computation of realistic stress and strain fields at a local scale in fretting. Models are proposed to improve surface and volume modelling, by taking into account the heterogeneity of stress fields due to the irregular interface. This gives a new view toward damage mechanisms. The surface heterogeneity which is considered here, results from the third body trapped in the contact zone. This third body is known to drastically influence the contact conditions. The competition between wear and crack initiation is investigated with respect to local stress fields. The first model is used to study the evolutions of particles and the contact stress according to the loading conditions. Then, Dang Van's multiaxial fatigue model is used to predict crack initiation during the fretting test. This criterion may highlight the presence of microcracking everywhere in the contact zone.
    No preview · Article · May 2011 · Wear
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    Henry Proudhon · Stéphanie Basseville
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    ABSTRACT: In this work, the finite elements method (FEM) is used to analyse the growth of fretting cracks. FEM can be favourably used to extract the stress intensity factors in mixed mode, a typical situation for cracks growing in the vicinity of a fretting contact. The present study is limited to straight cracks which is a simple system chosen to develop and validate the FEM analysis. The FEM model is tested and validated against popular weight functions for straight cracks perpendicular to the surface. The model is then used to study fretting crack growth and understand the effect of key parameters such as the crack angle and the friction between crack faces. Predictions achieved by this analysis match the essential features of former experimental fretting results, in particular the average crack arrest length can be predicted accurately.
    Full-text · Article · Mar 2011 · Engineering Fracture Mechanics
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    Yoann Guilhem · Stéphanie Basseville · Francois Curtit · J-M Stéphan · Georges Cailletaud
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    ABSTRACT: Fatigue crack initiation in ductile alloys like austenitic stainless steels is mainly due to the occurrence of localized deformation in persistent slip bands (PSB). The presence of PSB is classically related to the orientation of the surface grains. In fact, the local fields in a grain does not depend on the local orientation only. The aim of the present paper is to investigate the consequences of this observation, and to propose an analysis, where the neighborhood of the grain also plays a significant role. The study is made on a 316 stainless steel. Finite element computations using a crystal plasticity model are performed to simulate an aggregate submitted to a cyclic tension–compression loading. Various configurations of grain orientations ("clusters") are studied at the free surface of the aggregate. A statistical analysis of the results is carried out to extract significant information concerning the local strain and stress fields, including the most critical arrangements of grain orientations. The introduction of local fields in classical fatigue life prediction models provides an explanation of the experimental scatter.
    Full-text · Article · Nov 2010 · International Journal of Fatigue
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    Henry Proudhon · Stéphanie Basseville · Lingtao Sun · Georges Cailletaud
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    ABSTRACT: Résumé — Le fretting est un endommagement insidieux qui peut prendre la forme de petites fissures s'amorçant en bordure de contact et se propageant sous la surface. Ces fissures peuvent grandement affecter les propriétés de services de pièces en abaissant la limite de fatigue, il est donc très important de comprendre et prédire leur développement. Dans ce travail, la méthode des éléments finis est utilisée pour prédire la croissance de fissures de fretting en lien avec leur trajet de fissuration. L'effet du mode mixte imposé par le contact ainsi que celui de la microstructure du matériau sont étudiés par simulation. Mots clés — fretting, propagation de fissure, éléments finis, microstructure.
    Full-text · Article · May 2009
  • Thomas Dick · Stéphanie Basseville · Georges Cailletaud
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    ABSTRACT: The damage mechanisms in fretting tests are wear and fatigue cracking. The gradients of the stress and strain fields are quite high under the contact, so that the typical associated lengths can be compared to grain size. Since the microstructure size is not negligible when compared to the length associated to the loadings, it seems reasonable to explicitly represent the grains in the computations. This is proposed in this paper: a polycrystal plasticity model is used for the case of a disk-plane contact with two bodies made of titanium alloy. The simulations corresponding to a material response fretting map are compared to fretting experiments. The fatigue prediction is made by means of the Dang Van high cycle fatigue parameter.
    No preview · Article · Jul 2008 · Computational Materials Science
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    Stéphanie Basseville · Olivier Vernhet · Georges Cailletaud

    Full-text · Article · Jan 2007
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    S. Basseville · G. Cailletaud · T. Coupez · F. Feyel · M. Kern

    Full-text · Article ·

Publication Stats

84 Citations
14.04 Total Impact Points

Institutions

  • 2008-2015
    • Université de Versailles Saint-Quentin
      • • Laboratoire d'Ingénierie des Systèmes de Versailles (LISV)
      • • Laboratoire d’Ingénierie des Systèmes de Versailles (LISV)
      Versailles, Île-de-France, France
  • 2007
    • French National Centre for Scientific Research
      Lutetia Parisorum, Île-de-France, France