Publications

2001

• Approche par contrôle optimal des structures élastoviscoplastiques sous chargement cyclique
  
  • Peigney Michaël
  • Stolz Claude
  Comptes Rendus de l'Academie des Sciences Serie II, Gauthier-Villars, 2001, 329, pp.643-648. On utilise l'approche par contrôle optimal pour étudier le comportement de structures élastoplastiques sous chargement cyclique. L'état asymptotique est ainsi obtenu comme solution d'un problème approché cohérent avec une discrétisation spatiale. Dans ce cadre, on montre que les seuls points stationnaires de la fonctionnelle à minimiser sont les minima globaux. (10.1016/S1620-7742(01)01381-2)
  DOI : 10.1016/S1620-7742(01)01381-2
• Comportement mécanique non linéaire et homogénéisation
  
  • Bornert Michel
  , 2001.
• Fatigue Analysis of Welded Structures during Random Loadings
  
  • Zarka Joseph
  • Karaouni Habib
  , 2001.
• Homogénéisation des milieux aléatoires : bornes et estimations
  
  • Bornert Michel
  • Bretheau Thierry
  • Gilormini Pierre
  , 2001, pp.133-222.
• Stability of a quasi-static evolution of a visco-elastic, visco-plastic or elastic-plastic solid
  
  • Abed-Meraim Farid
  • Nguyen Quoc Son
  , 2001, pp.1-14. The problem of stability of a quasi-static evolution of a solid is discussed in the framework of standard plasticity and visco-plasticity. General results concerning the criterion of second variation of energy are presented. Two different approaches are considered to discuss this problem for visco-elastic, visco-plastic or elastic-plastic solids. The first approach is based upon the linearization method and gives the asymptotic stability of the evolution of a visco-elastic solid when the associated dissipation potential is quadratic and positive-definite. The second approach introduces a direct analysis of the evolution in a nonsmooth but convex framework of plasticity and visco-plasticity. (10.1007/978-1-4613-0275-9_1)
  DOI : 10.1007/978-1-4613-0275-9_1
• Life-time prediction of aluminum automotive components under thermo-mechanical cyclic loadings
  
  • Verger Laetitia
  • Charkaluk Eric
  • Constantinescu Andrei
  , 2001.
• Identification of constitutive parameters in engineering problems
  
  • Constantinescu Andrei
  • Lecampion Brice
  • Verger Laetitia
  • Tardieu Nicolas
  , 2001.
• Une formulation symétrique pour le couplage entre éléments finis et éléments de frontière
  
  • Mouhoubi Saïda
  • Bonnet Marc
  • Ulmet Laurent
  , 2001, 11 (2-4), pp.627-634. Cet article présente une procédure, basée sur les équations intégrales variationnelles symétriques régularisées en élasticité tridimensionnelle, permettant de construire la matrice de rigidité d'un super-élément. Celle-ci ne porte que sur les déplacements nodaux à la frontière du domaine définissant le super-élément, supposé élastique et sans force de volume. Cette technique a été implantée dans l'environnement CAST3M, y compris dans le cas où le domaine élastique contient une fissure. Trois exemples numériques tridimensionnels sont présentés: cavité sphérique pressurisée en milieu infini élastoplastique, assemblage, cylindre avec fissure. (10.3166/reef.11.277-289)
  DOI : 10.3166/reef.11.277-289
• Applying the virtual fields method to determine the through-thickness moduli of thick composites with a nonlinear shear response
  
  • Grédiac Michel
  • Auslender François
  • Pierron Fabrice
  Composites Part A: Applied Science and Manufacturing, Elsevier, 2001, 32, pp.1713-1725. This paper presents a method allowing the simultaneous identification of parameters governing an orthotropic law with a nonlinear shear response. Such laws appear for instance through the thickness of thick laminated composites. The tested specimen is subjected to boundary conditions similar to those of a Iosipescu setup. The strain field in the central area is processed with the so-called virtual fields method, which is an application of the principle of virtual work with particular virtual fields. The method is simulated with data obtained from finite element calculations. (10.1016/S1359-835X(01)00029-X)
  DOI : 10.1016/S1359-835X(01)00029-X
• Calcul tensoriel et élasticité
  
  • Bornert Michel
  • Suquet Pierre
  , 2001, pp.171-202.
• Infrastructure and Conservation Applications of Infrared and Thermal Testing
  
  • Luong Minh-Phong
  , 2001, 3, pp.613-655.
• Handbook of Continuum Mechanics
  
  • Salençon Jean
  , 2001. The scale that concerns the practitioner in mechanics is usually qualified as macroscopic. Indeed, applications are rarely much below the human scale, and in order to be relevant models must be constructed on a similar scale, several orders of magnitude greater than the objects that are normally attributed to the physicist's sphere of interest. The mechanicist is therefore aware of the limits of these models, no matter how elegant their mathematical formulation may be, when the time comes far experimental validation. The mechanicist has a deep concern for the microscopic phenomena at the heart of what is being modelled, exposed by the physicist's research, which can today explain a wide range of material behaviour. The aim of this book is to present the general ideas behind continuum mechanics, thermoelasticity and one-dimensional media. Our approach to constructing mechanical models and modelling forces is based upon the principle oi virtual work. There are several advantages to this method. To begin with, it clearly emphasises the key role played by geometrical modelling, leading to mechanically consistent presentations in a systematic way. In addition, by requiring rigorous thought and clear formulation of hypotheses, it identifies the inductive steps and emphasises the need for validation, despite its axiomatic appearance. Moreover, once mastered, it will serve as a productive tool in the reader's later research career. This duality is used in the chapter devoted to variational methods for the solution of thermoelastic problems. (10.1007/978-3-642-56542-7)
  DOI : 10.1007/978-3-642-56542-7
• Une méthode de calcul de structures soumises à des chargements mobiles
  
  • Nguyen-Tajan Thi Mac-Lan
  • Maitournam Habibou
  • Thomas Jean-Jacques
  , 2001, 11 (2-4), pp.351-358. Le travail présenté dans cet article s'inscrit dans une étude globale de la tenue en service d'un disque de frein automobile. Celui-ci subit des chargements thermomécaniques responsables de divers types d'endommagement : faïençage, fissures radiales sur les pistes de frottement, rupture du bol. La prédiction numérique de ces avaries exige d'abord la mise au point de méthodes numériques adaptées aux problèmes de structures soumises à des chargements thermomécaniques mobiles. Celles-ci consistent en des algorithmes eulériens qui sont présentés et décrits. (10.3166/reef.11.247-261)
  DOI : 10.3166/reef.11.247-261
• Cinétique de fissuration de revêtements sur un substrat ductile : application à des dépôts de tungstène PVD déposés sur un acier
  
  • Ganne T.
  • Crépin Jérôme
  • Zaoui A.
  • Serror S.
  , 2001. No abstract provided
• Estimations affine et au second ordre du comportement non linéaire des composites et polycristaux
  
  • Bornert Michel
  , 2001.
• Non-destructive evaluation of a limit of acceptable damage for leather products
  
  • Luong Minh-Phong
  , 2001, pp.358-367.
• Modelling the Electromagnetic Forces Distribution in a Three Dimensional G.M.A.W. Weld Pool
  
  • Roger F.
  • Coiffier J. C.
  • Dang Van K.
  , 2001. No abstract provided
• Thermomechanical approach of contact-wear phenomena
  
  • Stolz Claude
  , 2001, pp.183-186.
• Strain localization in two-phase materials and polycrystals: Quantitative experimental investigations and modeling attempts
  
  • Bornert Michel
  • Doumalin Pascal
  • Crépin Jérôme
  • Soppa Ewa
  , 2001.
• Grammar-guided genetic programming and dimensional consistency: application to non-parametric identification in mechanics
  
  • Ratle Alain
  • Sebag Michèle
  Applied Soft Computing, Elsevier, 2001, 1 (1), pp.105-118. Although genetic programming has often successfully been applied to non-parametric modeling, it is frequently impaired by the huge size of the search space explored. Domain knowledge is a powerful way to trim out the size of the space, by restricting the search to a priori relevant models. A most natural domain knowledge in scientific modeling is known as dimensional analysis, stipulating that the models must be consistent with regards to the variable measurement units. In this paper, it is shown that dimensional analysis can automatically be expressed as a context free grammar. Dimensionally-aware GP is thus achieved by employing the dimensional grammar within the grammar-guided GP framework first investigated by Gruau [On using syntactic constraints with genetic programming, in: P. Angeline, K.E. Kinnear Jr. (Eds.), Advances in Genetic Programming II, MIT Press, Cambridge, MA, 1996, pp. 377–394.]. However, grammar-guided genetic programming encounters severe difficulties when it involves a complex grammar, which might explain why this approach has not been widely used so far. The drawback is blamed on the initialization step, which hardly constructs a sufficiently diversified initial population, thus hindering the success of evolution. This limitation is addressed by a new CFG compliant initialization procedure. The approach is validated on two problems related to the identification of mechanical properties of materials. (10.1016/S1568-4946(01)00009-6)
  DOI : 10.1016/S1568-4946(01)00009-6
• Avoiding the bloat with stochastic grammar-guided genetic programming
  
  • Ratle Alain
  • Sebag Michèle
  , 2002, pp.255-266. The application of Genetic Programming to the discovery of empirical laws is often impaired by the huge size of the search space, and consequently by the computer resources needed. In many cases, the extreme demand for memory and CPU is due to the massive growth of non-coding segments, the introns. The paper presents a new program evolution framework which combines distribution-based evolution in the PBIL spirit, with grammar-based genetic programming; the information is stored as a probability distribution on the grammar rules, rather than in a population. Experiments on a real-world like problem show that this approach gives a practical solution to the problem of introns growth. (10.1007/3-540-46033-0_21)
  DOI : 10.1007/3-540-46033-0_21
• An example of stick-slip waves
  
  • Moirot Franck
  • Nguyen Quoc-Son
  , 2001, pp.109-116. An analytical solution representing a family of stick–slip waves is obtained in a simple example modelling the dynamic behaviour of an elastic cylindrical tube in contact with Coulomb's friction with a rigid and rotating cylinder. This family of waves, representing the non-trivial periodic responses of a continuous system of one space variable, is not classical in the literature. (10.1007/978-94-017-1154-8_12)
  DOI : 10.1007/978-94-017-1154-8_12
• Affaissement en surface lors du creusement d'un souterrain
  
  • Bérest Pierre
  • Ghoreychi Mehdi
  • Habib Pierre
  Revue française de Géotechnique, edp sciences, 2001, 92, pp.41-47. L’affaissement à long terme de la surface du sol au-dessus d’un tunnel est comparé à l’affaissement instantané au moment du creusement dans le cadre de l’élasticité linéaire. Les résultats numériques montrent, sur des exemples vraisemblables, que si des déplacements importants sont décelés en surface, il s’agit très probablement de déformations irréversibles. (10.1051/geotech/2000092041)
  DOI : 10.1051/geotech/2000092041
• sur les mécanismes de la plasticité et de l'endommagement
  
  • Berveiller M.
  • Bretheau T.
  • Fougères R.
  • Gautier E.
  • Maire E.
  , 2001, pp.203-249.
• Etude thermodynamique de l'évolution sous chargement dynamique de structures délaminées
  
  • Pradeilles-Duval Rachel Marie
  Comptes rendus de l’Académie des sciences. Série IIb, Mécanique, Elsevier, 2001, 329, pp.535-540. On considère un assemblage de plaques modélisant une structure stratifiée se délaminant. La propagation du délaminage est caractérisée par la transformation d'une plaque en deux autres. On examine dans le cadre du formalisme hamiltonien l'influence d'un chargement dynamique sur une telle structure, d'un point de vue thermodynamique. L'étude du taux de restitution associé à la propagation de la fissure, considérée comme une source de chaleur localisée sur le front de délaminage, est discutée. (10.1016/S1620-7742(01)01364-2)
  DOI : 10.1016/S1620-7742(01)01364-2