This volume contains 44 papers presented at the Third Contact Mechanics International Symposium (CMIS 2001) held in Praia da Consola9ao, Peniche (portugal), June 17-21,2001. This Symposium was the direct continuation of the first two CMIS held in Lausanne (1992) and in Carry-Le-Rouet (1994). Other related meetings, in what concerns scientific topics and participants, took place in the nineties at La Grande Motte (1990), Vadstena (1996), Ferrara (1997), Munich (1998) and Grenoble (1999). The Symposium aimed at gathering researchers with interests in a wide range of topics in theoretical, computational and experimental contact mechanics. The call for papers mentioned topics in tribology, mathematical formulations and analysis, numerical methods in non-smooth mechanics, impact problems, instabilities and technological problems. The total number of participants was 102, from Universities and Research Institutes of 19 countries. The Scientific Committee reviewed 102 submitted abstracts, and the final program consisted of 6 main lectures, 43 oral communications and 36 poster presentations (see Appendix A). The papers in this book correspond to almost all the main lectures and oral communications, and they are assembled in 5 chapters: . Dynamics and Impact . Instabilities, Oscillations and Waves . Contact Models, Results and Applications . Mathematical Analysis . Numerical Methods. We thank all the authors for their valuable contributions to this volume. We are indebted to the members of the Scientific Committee for their help in refereeing the submitted abstracts and manuscripts. We also thank the Series editor, Prof. Graham Gladwell, for his assistance in the revision process.

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Preface. Third Contact Mechanics International Symposium. Part 1: Dynamics and impact. Numerical dynamics of granular materials; J.J. Moreau. Measurements of impacts with friction; F. Pfeiffer. Formulation and well-posedness of unilateral multibody dynamics; P. Ballard. Collisions in systems made of rigid bodies; E. Dimnet. Impacts with global dissipation index at reentrant corners; C. Glocker. Understanding impact through continuous medium vibrations; L. Paoli, M. Schatzman. Solving rocking block problems with multiple impacts; C. Yilmaz, Y. Hurmuzlu. A controllability criterion for linear juggling mechanical systems; B. Brogliato, et al. On integrating stiff multibody dynamics with contact and friction; M. Anitescu, F.A. Potra. Analysis of systems with multiple frictional contacts; A.P. Ivanov. 2: Instabilities, oscillations and waves. Initiation of friction instability on a plane fault system; I.R. Ionescu, et al. An example of stick-slip waves; F. Moirot, Q.-S. Nguyen. Longitudinal waves in elastic rods with discontinuous cross sections; W. Schiehlen, et al. The influence of contact properties on friction-induced brake vibrations; M. Rudolph, K. Popp. Analysis of eigenvalue problems modelling friction: sufficient conditions of non-uniqueness for the elastic equilibrium; R. Hassani, et al. 3: Contact models, results and applications. Adhesion of viscoelastic spherical solids; K.L. Johnson, J.A. Greenwood. A model of adhesion added to contact with friction; C. Talon, A. Curnier. Phenomenological model of friction accounting for subsurface plastic deformation in metal forming; S. Stupkiewicz, Z. Mróz. Thermoelastic instabilities in automotive disc brakes&endash; finite element analysis and experimental verification; Y.-B. Yi, et al. Friction coefficient evolution during wear tests related to infrared emission; N. Stalin, J.C. Eytard. A contact formulation for electrical and mechanical resistance; G. Zavarise, et al. The real area of contact &endash; a combination of experimental and numerical approaches; F. Bucher, R.S. Dwyer-Joyce. Prediction of wheel wear for rail vehicles &endash; methodology and verification; T. Jendel, M. Berg. Multi-body modeling of paper calendering unit by contact dynamics for formulation; E. Keskinen, et al. 4: Mathematical analysis. Existence and uniqueness for quasistatic contact problems with friction; L.-E. Andersson, A. Klarbring. Augmented lagrangian methods for a class of nonconvex contact problem in structural mechanics; W.R. Bielski, et al. Approximation in quasitatic Signorini problems with local friction by a mixed method; M. Cocou, R. Rocca. A beam in adhesive contact; W. Han, et al. Coulomb fluid-solid interface law in lubrication; G. Bayada, M. Boukrouche. Elastodynamic friction problem with a 'surface inertia' perturbation; J.-C. Paumier, Y. Renard. Solvability of thermo-viscoelastic contact problem with Coulomb friction and nonlinear heat conductivity; J. Ahn, D.E. Stewart. Convergence for a time discretization of dynamic contact problems with friction; E. Pratt, J.-M. Ricaud. Solution methods for structural optimization in contact rod problems; I.N. Figueiredo, et al. 5: Numerical methods. Unilateral contact, friction and adhesion: 3D cracks in composite materials; M. Raous, Y. Monerie. The unilateral frictional contact of a piezoelectric body with a rigid support; P. Bisegna, et al. Contact between 3D beams with rectangula