Publications

2003

• Calcul de l'usure sous chargement cyclique par une méthode de minimisation
  
  • Peigney Michaël
  , 2003, pp.405-412 (tome 1). No abstract provided
• Prédiction de la géométrie d'une soudure à l'arc: un exemple de modélisation multiphysique
  
  • Roger F.
  • Dang Van K.
  , 2003, pp.353-360 (tome 2). No abstract provided
• Analyse des instabilités numériques liées au modèle de comportement élasto- viscoplastique dans les codes explicites
  
  • Mouro P.
  • Gary G.
  , 2003, pp.101-108 (tome 2). No abstract provided
• An `affine' micromechanical approach for the prediction of the elastoplastic behaviour of polycrystals at finite strain
  
  • Auslender F.
  • Bornert Michel
  • Hoc T.
  • Masson Renaud
  • Zaoui A.
  , 2003.
• Analysis of continental midcrustal strain localization induced by microfracturing and reaction-softening
  
  • Gueydan F.
  • Leroy Y. M.
  • Jolivet J.
  • Agard Philippe
  Journal of Geophysical Research : Solid Earth, American Geophysical Union, 2003, 108 (B2), pp.2064. (10.1029/2001JB000611)
  DOI : 10.1029/2001JB000611
• Exploiting partial or complete geometrical symmetry in 3D symmetric Galerkin indirect BEM formulations
  
  • Bonnet Marc
  International Journal for Numerical Methods in Engineering, Wiley, 2003, 57, pp.1053-1083. Procedures based on group representation theory, allowing the exploitation of geometrical symmetry in symmetric Galerkin BEM formulations, are investigated. In particular, this investigation is based on the weaker assumption of partial geometrical symmetry, where the boundary has two disconnected components, one of which is symmetric; e.g. this can be very useful for defect identification problems. The main development is expounded in the context of 3D Neumann elastostatic problems, considered as model problems; and then extended to SGBIE formulations for Dirichlet and/or scalar problems. Both Abelian and non-Abelian finite symmetry groups are considered. The effectiveness of the present approach is demonstrated through numerical examples, where both partial and complete symmetry are considered, in connection with both Abelian and non-Abelian symmetry groups. (10.1002/nme.716)
  DOI : 10.1002/nme.716
• Non-uniqueness of solutions for elastic problems with Coulomb friction at the boundary
  
  • Ballard P.
  , 2003. No abstract provided
• Determination of the stabilized response of a structure undergoing cyclic thermal-mechanical loads by a direct cyclic method
  
  • Nguyen-Tajan Thi Mac-Lan
  • Pommier Benjamin
  • Maitournam Habibou
  • Mechkour Houari
  • Verger Loick
  • Du Z. Z.
  • Snyman M.
  , 2003.
• Micromecanical investigation of the effect of defect clustering on the brittle-ductile transition of a nuclear vessel steel
  
  • Bilger N.
  • Auslender F.
  • Bornert Michel
  • Michel J. C.
  • Moulinec H.
  • Suquet P.
  • Zaoui A.
  , 2003. No abstract provided
• Tenue en service des structures en caoutchouc
  
  • Raoult Ida
  • Bourgeois Myriam
  • Stolz Claude
  , 2003, pp.397-404 (tome 1).
• La microextensométrie : un outil de la mécanique des matériaux
  
  • Bretheau T.
  • Crépin Jérôme
  • Doumalin P.
  • Bornert Michel
  Revue de Métallurgie, EDP Sciences, 2003, 5, pp.567-575. On présente ici une technique expérimentale, tant qualitative que quantitative, permettant de caractériser le champ de déformation dans un matériau hétérogène, sur un domaine représentatif de sa microstructure. Cette technique utilise la microscopie électronique à balayage, la microélectrolithographie, l’analyse d’image et des moyens d’essais mécaniques in situ. Si elle permet, en relation avec une analyse microstructurale, de mettre en évidence les différents mécanismes responsables de la plasticité et/ou de l’endommagement des matériaux, son utilisation quantitative en fait un outil essentiel de validation des modèles de prédiction de comportement, que ce soit à l’échelle locale ou à l’échelle macroscopique. Enfin, la connaissance du champ de déplacement expérimentalement mesuré permet d’améliorer sensiblement le résultat des simulations numériques par éléments finis par une meilleure prise en compte des conditions aux limites imposées sur le bord de la cellule modélisée. (10.1051/metal:2003110)
  DOI : 10.1051/metal:2003110
• Etude expérimentale micromécanique de la déformation, de l'endommagement et de la rupture des alliages à base zirconium hydrurés
  
  • Racine A.
  • Bornert Michel
  • Sainte-Catherine C.
  • Caldemaison D.
  , 2003. No abstract provided
• Evaluation of nonlinear homogenisation schemes at the global and local scale by means of comparisons with exact solutions
  
  • Rekik E.
  • Bornert Michel
  , 2003. No abstract provided
• A global computational approach in engineering problems: identification
  
  • Constantinescu Andrei
  • Dang Van Ky
  , 2003.
• On shakedown theorems in hardening plasticity
  
  • Nguyen Q. S.
  , 2003.
• A unified analysis for low and high cycle fatigue based on shakedown concepts
  
  • Constantinescu Andrei
  • Dang Van Ky
  • Maitournam Habibou
  Fatigue and Fracture of Engineering Materials and Structures, Wiley-Blackwell, 2003, 26, pp.561-568. The purpose of this paper is to present a unified analysis to both high and low cycle fatigue based on shakedown theories and dissipated energy. The discussion starts with a presentation of the fatigue phenomena at different scales (microscopic, mesoscopic and macroscopic) and of the main shakedown theorems. A review of the Dang Van high cycle fatigue criterion shows that this criterion is essentially based on the hypothesis of elastic shakedown and can therefore be expressed as a bounded cumulated dissipated energy. In the low cycle fatigue regime, recent results by Skelton and Charkaluk et al. show that we can speak of a plastic shakedown at both mesoscopic and macroscopic scale and of a cumulated energy bounded by the failure energy. The ideas are also justified by infrared thermography tests permitting a direct determination of the fatigue limit. (10.1046/j.1460-2695.2003.00675.x)
  DOI : 10.1046/j.1460-2695.2003.00675.x
• Rolling contact in railways: modelling, simulation and damage prediction
  
  • Dang Van Ky
  • Maitournam Habibou
  Fatigue and Fracture of Engineering Materials and Structures, Wiley-Blackwell, 2003, 26, pp.939-948. Various kinds of defects are induced by rolling contact on the rail track: kidney‐shaped cracking, shelling and nowadays squat and head checking, which are studied under the sponsorship of the French national railways company SNCF. Modelling of such defects requires the development of specific computational tools in order to evaluate, in the vicinity of the wheel–rail contact zone, the mechanical state (stress, plastic strain cycle and residual stress pattern), which is at the origin of the damages. Moreover, since the loadings induce multiaxial stress and strain states, it is necessary to use a multiaxial criterion to predict the occurrence of fatigue cracks. This review paper is devoted to the presentation of the main results of this research. (10.1046/j.1460-2695.2003.00698.x)
  DOI : 10.1046/j.1460-2695.2003.00698.x
• Actes du 6e Colloque National en Calcul des Structures
  
  • Potier-Ferry Michel
  • Bonnet Marc
  • Bignonnet André
  , 2003, pp.3 tomes.
• Calcul de structure sous chargement thermomécanique : influence de la formulation anisotherme de la loi de comportement
  
  • Nesnas Karim
  • Martin-Borret Guy
  • Constantinescu Andrei
  • Verger Loick
  , 2003, pp.67-74 (tome 2).
• Instability and friction
  
  • Nguyen Quoc Son
  Comptes Rendus. Mécanique, Académie des sciences (Paris), 2003, 331 (1), pp.99-112. A review on the stability analysis of solids in unilateral and frictional contact is given. The presentation is focussed on the stability of an equilibrium position of an elastic solid in frictional contact with a fixed or moving obstacle. The problem of divergence instability and the obtention of a criterion of static stability are discussed first for the case of a fixed obstacle. The possibility of flutter instability is then considered for a steady sliding equilibrium with a moving obstacle. The steady sliding solution is generically unstable by flutter and leads to a dynamic response which can be chaotic or periodic. This dynamic response leads to the generation of stick–slip–separation waves on the contact surface in a similar way as Schallamach waves in statics. Illustrating examples and principal results recently obtained in the literature are reported. Some problems of friction-induced vibration and noise emittence, such as brake squeal for example, can be interpreted in this spirit. (10.1016/S1631-0721(03)00020-2)
  DOI : 10.1016/S1631-0721(03)00020-2
• Direct evaluation of double singular integrals and new free terms in 2D (symmetric) Galerkin BEM
  
  • Bonnet Marc
  • Guiggiani Massimo
  Computer Methods in Applied Mechanics and Engineering, Elsevier, 2003, 192, pp.2565-2596. In this paper a new general algorithm is developed for the direct evaluation of all singular double integrals arising in the 2D Galerkin BEM, including those with hypersingular kernels. A distinguishing feature of the proposed method is that double singular integrals are treated as a whole, that is, not as inner integrals followed by outer ones. Therefore, when applied to the symmetric Galerkin BEM, the proposed technique is strictly symmetry preserving. Moreover, a careful analysis of the limiting process is performed which shows that some new free terms may arise. (10.1016/S0045-7825(03)00286-X)
  DOI : 10.1016/S0045-7825(03)00286-X
• In situ field measurements
  
  • Bornert Michel
  , 2003.
• IABEM 2002
  
  • Kinnas S.
  • Bonnet Marc
  , 2003.
• Dissipation and Fatigue Damage
  
  • Charkaluk Eric
  • Constantinescu Andrei
  , 2003, 46 (10), pp.524-530. The discussion of fatigue damage is generally separated in two domains: Low Cycle Fatigue (LCF) and High Cycle Fatigue (HCF). The transition zone concerns the case of limited endurance, while the unlimited endurance is generally assimilated with HCF. Fatigue failure is the result of complex microscopic phenomena which occur under cyclic loading. However, the principal mechanism responsible for the crack initiation, common to all domains, is the spatial extension of inelastic strains (plastic or viscous) in the grains due to the motion of dislocations. The major difference between HCF and LCF regimes is that inelastic strains develop at the material's mesoscopic and macroscopic scales, respectively. As the underlying mechanics are the same, there should be no reason to have distinct criteria in HCF and LCF. The objective of this paper is to give some further considerations based on dissipation towards a unified method to treat fatigue damage. (10.3139/120.100615)
  DOI : 10.3139/120.100615
• Underground cavity detection based on an elastodynamic boundary element approach and the topological derivative
  
  • Bonnet Marc
  • Guzina B.
  • Nintcheu Fata S.
  , 2003, pp.582-587. No abstract provided