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List of EUROMECH Colloquia in 2012

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• [514] New trends in Contact Mechanics

  Date:	27 March 2012 - 31 March 2012
  Location:	Cargese, Corsica, France
  Contact:	Chairperson: Dr. Michel Raous Directeur de Recherche CNRS Laboratoire de Mécanique et d’Acoustique 31, chemin Joseph Aiguier 13402 Marseille Cedex 20, France Phone : +33 4 91 16 40 53 Fax : + 33 4 91 16 44 81 Email : raous@lma.cnrs-mrs.fr Co-chairperson: Prof. Peter Wriggers Institut für Kontinuumsmechanik Leibniz Universität Hannover Appelstr 11 D 30167 Hannover, Germany Phone : + 49 511 762 2220 Email : wriggers@ikm.uni-hannover.de Website
  Information:	Although considerable progress was achieved in the last fifteen years on Contact Mechanics, many problems are still open on contact and interface modeling, both on the theoretical and engineering aspects. They concern especially contact dynamics, stability, multilevel approaches, existence and (non) uniqueness of solutions, damage in the interfaces and efficient and robust numerical methods for large scale contact problems. The scope of this Colloquium is to gather specialists of these various fields in order to reinforce the interchanges between the communities on these different topics and to stress the complementarity of the contributions for mutual progress on contact modelling.

• [524] Multibody system modelling, control and simulation for engineering design

  Date:	27 February 2012 - 1 March 2012
  Location:	Enschede, The Netherlands
  Contact:	Chairperson: Prof. Ben Jonker University of Twente, Faculty CTW Mechanical Automation P.O. Box 217 – Building Horst 7500 AE Enschede, The Netherlands Email : J.B.Jonker@utwente.nl Co-chairpersons: Prof. Werner Schiehlen Institute of Engineering and Computational Mechanics, University of Stuttgart Germany website
  Information:	The colloquium addresses the method of multibody system dynamics for advanced technologies and engineering design for which a numerical efficient approach is crucial. In particular a designer can take significant advantage of model based dynamical analysis. The numerical methods applied for multibody systems dynamics have proved to offer solutions for the analysis of systems with interconnected rigid and flexible bodies subject to various loads and undergoing complex motion. While high accuracy can be obtained with extended models including a large number of degrees of freedom, there is a clear need for numerically efficient techniques that still offer an adequate level of accuracy. E.g. the optimisation of the design parameters usually implies that systems with varying parameters have to be analysed in a short time. The modelling techniques applied for this purpose should provide fast simulations of the relevant system’s behaviour which exhibits often non-linearities. Depending on the application area, multibody dynamic analysis has to be coupled to other relevant physical domains to address e.g. electrical and thermal effects or fluid-structure interaction. Mechatronic systems are usually modelled as multibody systems subject to sophisticated non-linear control. Model order reduction techniques are required for control design and to increase the computational speed. The goal of this colloquium is to provide a platform for discussions on the relation between multibody systems analysis tools and the requirements needed for design. Topics are: • Numerically efficient multibody system dynamics techniques; • Design principles for exact constraint; • Underconstraint and overconstraint mechanical systems; • Underactuated and overactuated compliant mechanisms; • Flexible multibody dynamics and reduced order modelling; • Mechatronic design and control systems; • Parameter optimisation and manufacturing tolerances; • Simulation for engineering design; • Applications to engineering systems.

• [528] Wind Energy and the impact of turbulence on the conversion process

  Date:	22 February 2012 - 24 February 2012
  Location:	Oldenburg, Germany
  Contact:	Chairperson: Dr. Joachim Peinke Institute of Physics & ForWind University of Oldenburg D 26111 Oldenburg, Germany Email: peinke@uni-oldenburg.de Co-chairpersons:  Prof. Stefan Ivanell Cramérgatan 3 Gotland University SE-621 67 Visby, Sweden Ph: +46 498 299733 Email: Stefan.Ivanell@hgo.se Website
  Information:	Joint colloquium EUROMECH (J. Peinke) with ERCOFTAC and EAWE This is made possible thanks to the European Project E-CAero "EUROPEAN COLLABORATIVE OF AERONAUTICAL RESEARCH AND APPLICATIONS" (www.e-caero.com) The wind energy conversion process is in first line a fluid mechanical problem. Wind conditions on small, medium and and large scales are characterized by turbulence thus it becomes more and more important to handle properly the impact of turbulence on the wind energy conversion process. The aspects range from meteorological aspects- like LES modelling of wind flow conditions in complex terrain to aspects of short time changing wind conditions for the emergence of stall effects. There is a big need to transfer advanced methods from basic fluid mechanics to the application of wind energy. Thus it is intended by this meeting to bring together experts from EUROMECH and from the new growing Wind energy community. Particular topics will be CFD with focus on LES. Advances in the simulation of wind conditions in complex terrain as well as simulations of the flow in and behind a wind park. Flow around a wind turbine. This topic is approached from different directions. Different CFD codes are in use to resolve the unsteady flow conditions around a moving rotor blade. Basis of many approaches are the measurement data from the MEXICO project. At the same time different experimental approaches are currently under the way, ranging from small modell experiments in wind tunnels to free field measurements with LIDAR. Dynamic stall is on of the central aspects of the flow situation around roto blades if a wind turbine. Turbulent inflow conditions. The dynamics of a wind turbine is not only determined by its own flow effects but also by the highly turbulent inflow conditions. There is a big demand for good synthetic turbulent inflow conditions for numerical simulations as well as for experimental studies. Modes of turbulent wind fields as well as the uses of active grids in wind tunnels are actually investigated. Flow control. As a consequence of the turbulent inflow conditions and it changing working conditions for a blade the interest in active control as used fro airplanes is actually increasing. Effects of turbulence on the wind turbine are manyfold, ranging from oscillating loads, vibrating modes of mechanical parts to highly fluctuating power generation. Here we want to focus on effects which can be traced back to the turbulent nature of the wind conditions.

• [532] Time-periodic systems: current trends in theory and application

  Date:	27 August 2012 - 30 August 2012
  Location:	Frankfurt, Germany
  Contact:	Chairperson: Dr. Fadi Dohnal Institute for Structural Dynamics Department of Mechanical Engineering Technische Universität Darmstadt Petersenstr. 30, 64287 Darmstadt, Germany phone: +49-6151-166704 fax: +49-6151-163668 email: dohnal@sdy.tu-darmstadt.de   Co-Chairperson: Prof. Dr. J. J. Thomsen Department of Mechanical Engineering, Solid Mechanics Technical University of Denmark Kgs. Lyngby, Denmark Prof. Dr. P. Hagedorn Fraunhofer Institute LBF Dynamics and Vibrations Group Darmstadt, Germany   Website
  Information:	This colloquium provides a forum for experts in applied mathematics and physics, mechanics and engineering (civil, mechanical and electrical) to exchange ideas and get awareness of trends in the analysis and real application of time-periodic systems. A wide range of topics is welcomed, especially these: New developments in solution techniques (e.g. homotopy methods, complexification, perturbation techniques), continuous structures under axial loads (e.g. beams or rotating shells), effects of strong nonlinearity; effects of multi-frequency excitation (e.g. quasi-periodic parametric excitation), parametric resonance amplification (e.g. for micro-ring gyroscopes, scanning probe microscopy) and efficient analysis of complex structures (e.g. Chebyshev approximation of fundamental solutions).

• [534] Advanced experimental approaches and inverse problems in tissue biomechanics

  Date:	29 May 2012 - 31 May 2012
  Location:	Saint-Etienne, France
  Contact:	Chairperson: Prof. Stéphane Avril Ecole Nationale Supérieure des Mines 158 cours Fauriel, 42023 SAINT-ETIENNE cedex 2 phone : +33(0)477420188, fax : +33(0)477499694 email: avril@emse.fr Co-Chairperson: Prof. Sam Evans School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA Website
  Information:	This colloquium will serve as a forum for an up-to-date account of the recent advances in testing approaches, imaging techniques and inverse problems for applications in tissue mechanics and biomechanics. The colloquium will be the occasion of gathering the main European leading actors involved in developing advanced tools for characterizing the mechanical behaviour of biotissues and in applying these tools to actual clinical situations. The colloquium is intended to be interdisciplinary and open to authors working in different fields but that may have a common interest in inverse methodologies and optical techniques for biomechanics and tissue engineering.

• [535] Similarity and Symmetry Methods in Solid Mechanics

  Date:	6 June 2012 - 9 June 2012
  Location:	Varna, Bulgaria
  Contact:	Chairperson: Prof. Jean-François Ganghoffer LEMTA - ENSEM 2, Avenue de la Forêt de Haye BP 160 54504 Vandoeuvre Cedex France phone: +33 383595724 fax: +33 383595551 email: jean-francois.Ganghoffer@ensem.inpl-nancy.fr Co-Chairperson: Dr. Ivailo Mladenov Institute of Biophysics Bulgarian Academy of Sciences Acad. G. Bonchev Str., Bl. 21 1113 Sofia, Bulgaria email: mladenov@obzor.bio21.bas.bg  Website

• [536] Nanobubbles and micropancakes

  Date:	13 February 2012 - 17 February 2012
  Location:	Les Houches, France
  Contact:	Chairperson:   Dr. James Seddon University of Twente Faculty of Science and Technology Physics of Fluids, P.O. Box 217 7500 AE Enschede, The Netherlands phone: +31 53 489 4473 fax: +31 53 489 8068 email: j.r.t.seddon@utwente.nl Co-Chairperson: Dr. Detlef Lohse University of Twente d.lohse@utwente.nl Dr. Elisabeth Charlaix Lyon/Grenoble Elisabeth.Charlaix@lpmcn.univ-lyon1.fr   Website

• [537] Multi-scale Computational Homogenization of heterogeneous structures and materials

  Date:	26 March 2012 - 28 March 2012
  Location:	Université Paris-Est, Marne-la-Vallée, France
  Contact:	Chairperson: Prof. Julien Yvonnet Laboratoire Modélisation et Simulation Multi Echelle (UMR CNRS 8208) 5 Bd Descartes, 77454 Marne-la-Vallée cedex 2, France Phone : +33 1 60 95 77 95 Fax : + 33 1 60 95 77 99 Email : julien.yvonnet@univ-paris-est.fr  Co-Chairperson: Dr. Marc Geers Eindhoven University of Technology email : m.g.d.geers@tue.nl Dr. Frederic Feyel ONERA Office National d'Etudes et de Recherches en Aérospatial email : frederic.feyel@onera.fr Website
  Information:	In recent years considerable progress had been made in bridging the mechanics of materials to other disciplines, e.g. downscaling to the field of materials science or upscaling to the field of structural engineering. The steady progress essentially results from the research efforts invested in multi-scale modelling in general, whereby a focus on multi-disciplinary aspects naturally arises. This colloquium addresses a dedicated technique, i.e. computational homogenization, which is probably one of the most accurate techniques in upscaling the nonlinear behaviour of a well-characterized microstructure. This method is essentially based on the construction of a micro-scale boundary value problem, which is used to determine the local governing behaviour at the macro scale. The main added value of computational homogenization consists in surpassing limitations of analytical approaches, e.g. in the case of realistic multi-phase morphologies or complex nonlinear material behavior. Departing from the consolidated progress achieved in the past decade, many challenges have emerged, like: • Direct coupling for materials whose physical geometry is provided by high resolution 3D imagery; • Heterogeneous, time-dependent and non linear problems, including material dynamics; • Heterogeneous materials with coupled multi-physics behavior (phase change, chemo-mechanics, nonlinear thermo-mechanics...); • Multiscale damage modeling, capturing the transition from homogenization to localization; • Computational homogenization including size and second-order effects; • Multiscale simulations with non-local phenomena like cracks, instabilities or shear bands; • Extension of computational homogenization schemes to multi-physics problems • Reduction of computational costs associated with multiscale algorithms; • Integration of phenomena occurring at the nanoscale • Stochastic microscopic models This colloquium is intended to stimulate and initiate interactions between researchers active in this field of science, in order to provide hints and new routes to tackle the aforementioned open problems.

• [538] Physics of Sports

  Date:	3 April 2012 - 6 April 2012
  Location:	Ecole Polytechnique, Paris, France
  Contact:	Chairperson: Prof. Christophe Clanet Laboratoire d'Hydrodynamique (LadHyX) Ecole Polytechnique 91128 Palaiseau cedex, France Fax: +33 (0)1 69 33 52 92 Email: christophe.clanet@ladhyx.polytechnique.fr Co-Chairperson: Prof. Metin Tolan TU Dortmund Fakultät Physik & DELTA Experimentelle Physik I Otto-Hahn-Straße 4 D-44221 Dortmund Phone: +49-(0)231-755-3505/3506 Fax : +49-(0)231-755-3657 Email: metin.tolan@tu-dortmund.de  Website
  Information:	Physics consists in identifying repeatable sequences in our environment and finding the simplest underlying laws. In this colloquium, the environment is Sports and we have three main objectives: - Walk in the footprints of modern precursors (JB Keller, TB Benjamin) and show that sports do entangle a large number of physical concepts which can be used to optimise performance. - While applying the physical laws to this new domain, we expect that new questions or coupling will arise, and that new representations of physical phenomena will be proposed. - Finally, a side product of this colloquium is to show that sports can be an important vector for the presentation of advanced physical concepts. As a striking example, the quantum tunnel effect which is illustrated in figure 1 where the jumper passes over the bar despite the fact that his centre of mass always remains below the bar. In order to make links and establish the generic laws in different sports, the colloquium is structured in six Physics domains: Ballistics, Elasticity, Friction, Statistical physics, Waves & Fluids and Biomechanics. Each domain is detailed below and associated with invited speakers.

• [539] Mechanics of Unsaturated Porous Media:Effective stress principle from micromechanics to thermodynamics

  Date:	27 August 2012 - 30 August 2012
  Location:	Utrecht University, The Netherlands
  Contact:	Chairperson: S. Majid Hassanizadeh Department of Earth Sciences Faculty of Geosciences Utrecht University P.O. Box 80021 3508 TA Utrecht, The Netherlands Phone +31 (0)30 2537464 (+31 (0)30 2535031) Fax : +31 (0)30 2535030 Email : hassanizadeh@geo.uu.nl Co-Chairperson: Ehasan Nikooee  Shiraz University, Iran website
  Information:	The colloquium will be devoted to presenting advances in the mechanics of unsaturated porous media, in general, and soils, in particular. The principle of effective stress and its extension from the saturated to unsaturated porous media has been the subject of much research, but there is no consensus in this regard. Various approaches have been used to get insights into this principle. They span form micromechanical approaches to thermodynamic investigations. As it is evident from the title, the colloquium will be mostly centered on the concept of effective stress in unsaturated porous media and recent advancements of underlying theories.

• [540] Advanced Modelling of Wave Propagation in Solids

  Date:	1 October 2012 - 3 October 2012
  Location:	Prague, Czech Republic
  Contact:	Chairperson: Dr. Radek Kolman Institute of Thermomechanics AS CR, v. v. i. Academy of Sciences of the Czech Republic Dolejškova 1402/5 182 00 Prague 8, Czech Republic Phone: +420 266 053 442 Fax: +420 286 584 695 Email: kolman@it.cas.cz   Co-Chairperson: Arkadi Berezovski, Ph.D. Centre for Nonlinear Studies Institute of Cybernetics at Tallinn University of Technology Akadeemia tee, 21 12618 Tallinn, Estonia website
  Information:	The EUROMECH Colloquium 540 aims to bring together engineers and scientists with interest in modelling of wave propagation in solids. The Colloquium will concentrate on topics related to effects of linear and non-linear waves in solids, to solitary waves, to strongly dispersive wave propagation in inhomogeneous solids and to waves in materials with microstructures, etc. Attention will also be devoted to up-to-date formulations of non-linear constitutive equations in wave propagation problems, thermomechanical couplings, finite strains, strain rate effects, viscoplasticity, damage, phase transformations, and to descriptions of material response under complex thermomechanical loading. The wave propagation modelling is based on analytical and numerical methods both having their inherent scopes of validity that has to be subjected to verification analysis. The recent advances and properties of numerical approaches and strategies should also be discussed. The main purpose of the Colloquium is to discuss novel and recent methods of wave propagation modelling and to consider expected credibility of results especially in cases when comparison with those of experiment is not available. Theoretical, computational as well as experimental contributions on the wave propagation are welcome. Reporting about projects not brought to their final states is appreciated, since an important objective of the meeting is to stimulate and assist current research in wave propagation problems in solids. The EUROMECH Colloquium 540 intends to concentrate on topics such as • Linear and non-linear waves in solids, waves in strongly dispersive media, solitary waves. • Wave propagation in inhomogeneous materials and in materials with microstructures. • Wave propagation modelling with non-linear constitutive equations, dynamic response of materials under complex thermomechanical loading. • Recent development of analytical and numerical methods of wave propagation problems in solids. • Verification and validation of modern numerical methods, analysis of their accuracy and stability. • Experimental techniques in wave propagation in solids, destructive and nondestructive testing, determination of dynamic behavior of materials.