Publications

2000

• Science et règlement
  
  • Salençon Jean
  , 2000, pp.213-221.
• Thermomechanical description of moving discontinuities: Application to wear
  
  • Stolz Claude
  , 2000. The propagation of moving surface inside a body is analysed within the framework of thermomechanical couplings, when the moving surface is associated with an irreversible change of mechanical properties.The moving surface is a surface of heat sources and of entropy production, intensities of which are related to particular energy release rates defined in terms of Hamiltonian gradients. As examples, we analyse the evolution of partial damage in a composite sphere and a model for study the contact wear phenomena between two bodies.
• Percolation mécanique'' : pertinence des modèles classiques en viscoélasticité linéaire et nouvelles approches
  
  • Bornert Michel
  • Aussant F.
  • Zaoui A.
  , 2000. No abstract provided
• A critical study of SHPB test on the materials involved in crash problems
  
  • Zhao H.
  • Gary G.
  , 2000. No abstract provided
• Intelligent optimal design of naval structures: is it possible ?
  
  • Zarka J.
  , 2000. No abstract provided
• On the role of fluids in the cracks of elastic materials
  
  • Feraille Fresnet Adélaïde
  • Bui Huy Duong
  • Ehrlacher Alain
  , 2000, pp.53-64.
• Field Data vs. Theoretical Model to Quantify Drilling Efficiency and Disruption
  
  • Putot Claude
  • Perreau Philippe
  • Constantinescu Andrei
  SPE Drilling and Completion, Society of Petroleum Engineers, 2000, 15, pp.118-124. Mechanical and kinematics data at the bit have been collected during drilling operations and organized to identify optimal drilling efficiency. Transitional conditions towards abnormal behavior have been distinguished. Normal drilling is usually characterized by regular linear relationships between global control variables at the bit, which approximately correspond to an up scaling of a local Mohr Coulomb type failure mechanism of the rock. Most of our experimental data confirm this classical disposition. However, considerable departure from these relationships is noted, especially when there is BHA resonance or when there is partial balling at the bit. The field tests presented here allows us to verify classical theory and to draw up new guidelines for behavior in non- optimal or dangerous, evolving operating conditions, such as those that occur under poor cleaning conditions. The main features of a mechanical structuring model involving transition towards low efficiency conditions are presented, and it is shown how this model confirms our interpretation of field data. The model couples the drillability of rock and the general dynamics of the bit in an original and synthetic way. It makes it possible to understand and test the sensitivity of bit response to variables such as "weight on hook", torque on the drillstring and flow rate of the fluid. (10.2118/50579-MS)
  DOI : 10.2118/50579-MS
• Quelques exemples de vibrations et d'instabilité induites par le frottement
  
  • Nguyen Q. S.
  , 2000. No abstract provided
• Intelligent modelling of woven materials
  
  • Zarka Joseph
  • Doux Thierry
  , 2000.
• Plasticity of zirconium at intermediate temperatures: effect of a small quantity of sulfur
  
  • Ferrer F.
  • Bretheau Th.
  • Crépin Jérôme
  • Barbu A.
  , 2000. No abstract provided
• Optimal design of a beam with a direct link to CAD
  
  • Zarka J.
  • Hablot J. M.
  , 2000. No abstract provided
• Investigation expérimentale et modélisation micromécanique de la déformation locale à chaud d'aciers biphasés
  
  • Pinna Christophe
  • Bornert Michel
  , 2000.
• Détection et quantification thermique de particularités d'appui et de lésions superficielles chez les marcheurs de grand fond
  
  • Parganin D.
  • Loizeau J.
  • Luong M. P.
  • Genson F.
  , 2000. No abstract provided
• Instabilité du glissement stationnaire : application au crissement des freins
  
  • Moirot F.
  • Nguyen Q. S.
  , 2000. No abstract provided
• Brake squeal: a problem of flutter instability of the steady sliding solution?
  
  • Moirot Franck
  • Nguyen Quoc Son
  Archives of Mechanics, Polish Scientific Publishers Pwn, 2000, 52 (4-5), pp.645-661. Brake squeal results from friction-induced vibrations. This phenomenon is considered here and interpreted as a flutter instability of the steady sliding solution of an elastic solid in unilateral contact with friction with a moving obstacle. A mechanical analysis of the governing equations is given, in particular to obtain the steady sliding solution. The stability analysis of this solution is discussed. A numerical analysis by the finite element method is performed in order to compute the steady sliding solution and to discuss its stability for an automotive disk brake. The validation of the numerical procedure is examined in relation with some analytical results of the literature.
• Damage mechanism of Ti6AL4V substrats coated by tungsten based PVD layers under single particles impact loading
  
  • Graff G.
  • Stolz C.
  • Pradeilles-Duval R. M.
  • Sainte Catherine M.C.
  • Jomeaux S.
  • Penquer F.
  , 2000. No abstract provided
• Thermodynamical description of running discontinuities: application to wear
  
  • Stolz Claude
  , 2000.
• A regularized BIE formulation for thermo-hydro-mechanical analysis of fractured rocks
  
  • Vahida B.
  • Bonnet Marc
  • Pouya A.
  , 2000. No abstract provided
• On global behaviour of heterogeneous media with mechanical transformation along moving surfaces
  
  • Pradeilles-Duval R. M.
  • Stolz C.
  , 2000. No abstract provided
• Intelligent optimal design of naval structures: is it possible?
  
  • Zarka Joseph
  , 2000.
• Tribological and corrosion behaviours of graphite and titanium alloys couple during ring-on-disk tests
  
  • Serre I.
  • Celati N.
  • Pradeilles Duval R. M.
  , 2000, pp.591-596. No abstract provided
• Identification strategies for recovering material parameters from indentation experiments
  
  • Constantinescu Andrei
  • Tardieu Nicolas
  , 2000, pp.181-190. This chapter describes the progress obtained by the authors on the development of a numerical method for the identification of material parameters from indentation experiments. An indentation experiment is performed by pressing a punch on a material sample and measuring the applied force and the indentation depth. The proposed technique minimizes a least squares cost functional using gradient descent methods. In addition, the adjoint state method is extended to variational inequalities and this permits to compute the gradient of the cost functional with low numerical cost. Using this technique, a series of identifications from indentation experiments have been done and their results are discussed in this chapter. Inverse problem is of practical interest as the indentation test does not demand the creation of complicated specimens and is simple to perform. However, the applications are restricted by the difficult mechanical interpretation of the test. (10.1016/B978-008043693-7/50091-X)
  DOI : 10.1016/B978-008043693-7/50091-X
• Caractérisation morphologique 3D des matériaux de structure hétérogènes par microtomographie X et traitement d'image pour la prévision du comportement mécanique
  
  • Bornert Michel
  • Jeulin Dominique
  • Maire E.
  • Moulinec H.
  • Chaix J.-M.
  , 2000. No abstract provided
• Etude expérimentale du comportement à la fissuration des dépôts de tungstène PVD en fonction de leurs épaisseurs
  
  • Ganne T.
  • Crépin Jérôme
  • Zaoui A.
  • Pradeilles-Duval R. M.
  , 2000. No abstract provided
• Principles for the `intelligent' optimal design of materials and structures
  
  • Zarka Joseph
  , 2000.