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Intensive Course on Fracture, Plasticity and Fatigue 2004 September 20-24, 2004 |
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THE AIM OF THE COURSE
The designers of modern structural systems have to take into account crack initiation and crack propagation. For this, the classical fracture theory has been used over the past decades. Many contributors have helped to provide formulations and useful tools to solve technologically important problems. Such formulations are usually based on the stress intensity factors computed analytically or numerically using linear elasticity or special inelastic behaviors in plasticity; very often with only empirical justification. In the Laboratoire de Mécanique des Solides of the Ecole Polytechnique (France), during more than 40 years, teams directed by the lecturers have proposed several assessments of these formulations when the inelastic behavior of their materials involves work-hardening and creep. The purpose of this intensive course is to show how it is possible to transform the classical formulations to make them much clearer, leading to easier and more direct solution of the problems. The participants will be provided with a thorough grounding in this new tools. This will be achieved through a balance of lectures, demonstrations and discussions of problems of the participants own interest. |
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WHO SHOULD ATTEND THE COURSE
The intensive five day course is dedicated to mechanical and civil engineers and researchers who have to think about the design of reliable structures. It is recommended that they have some knowledge of numerical analysis of elastic structures and the classical plasticity in order to appreciate the advantages of these new tools. Several exercises will allow the participants to quickly master their principles. Direct applications to life prediction and defects identifications will be considered in order to show the exceptional potential of the tools for solving practical problems. The participants will have the opportunity to present their own problems and to receive comments from the other participants and the instructors of the course |
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COURSE CONTENT
The range of established methods in Fracture and Fatigue will be underlined.
The original elements to assess these methods proposed by the two lecturers will be then presented. It is hoped that this course will provide the real base of all researches and improvements on the safety and the realibility of structures.
This intensive course will train the participants/engineers-researchers in the real knowledge and use of these new tools dedicated to the optimal design of high quality and low cost structures.
The participants will receive several documents and many of the FORTRAN subroutines which are useful to integrate the tools using any program.
Introduction (J. Zarka) FIRST PART: FRACTURE (2 days) Static Linear Elastic Fracture Mechanics 1 (H.D. Bui) Training *(J. Zarka) Static Linear Elastic Fracture Mechanics 2 (H.D. Bui) Training (H. Maigre) COCKTAIL Static and dynamic Linear Elastic Fracture Mechanics 3 (H. maigre) Training (H. Maigre) Non linear Fracture Mechanics (ductile rupture, damage, viscosity) (H.D. Bui) Training (H. Maigre) Local and Global Instabilities in Ductile Failure (M. Wnuk) SECOND PART: PLASTICITY (2 days) Elements of Classical Plasticity (J. Zarka) Training (J. Frelat) Special Formulation of Plasticity (J. Zarka) Training (J. Frelat) Simplified Limit and Cyclic Analysis of Structures (J. Frelat) Training (J. Frelat) Training *(J. Frelat/H. Karaouni) BANQUETTHIRD PART: FATIGUE (1 day) Fatigue during Variable and Multi-parameter Loadings 1 (H. Maitournam) Fatigue during Variable and Multi-parameter Loadings 2 (H. Maitournam) Training *(H. Karaouni/J. Zarka) Crack propagation during variable loadings (J. Zarka) Training *(H. Karaouni/J. Zarka) * : on computers |
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REGISTRATION INFORMATION
Here you will find the registration form : Registration Form (WORD document - 92 Ko) Registrations will be taken in the order of receipt, as the course will accommodate a limited number of persons. The tuition for the full five day course is 1 500 € HT, if received by one month in advance, and 1 800 € HT if received after. A reduced fee of 200 € HT is accessed for those registrants who are professors or students for a one month advanced registration, and 500 € HT if received later. The registration fee includes the documents, all luncheons, coffe breaks and the banquet. Registrants who cancel one month prior to the course will be reimbursed the registration fee minus 100 € HT handling charge ; cancellations less than fifteen days prior to the course will be refunded 50%. A special 25% reduction is allowed for EDF's employees and AFM members. Note: the organizers will maintain the right to cancel the course in case of insufficient number of participants,or to modify slightly the program if need be. For all registered students who confirm their participation before july 30, 2004, there will be no registration fee; they will have to pay only for the meals and the banquet 120 € HT. |
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H.D. Bui, Member of the French Académie des Sciences, Fellow of Institute of Physics of London, and Member of the European Academy of Sciences, is now Conseiller Scientifique at EDF. His researches cover the science of materials and structures with a particular emphaze on elasticity, plasticity, fracture, damage. He is an expert in the integral equations and analytical methods. He is now more dedicated to the inverse problems with application on defect identification. He has published several books on fracture and inverse problem. He is the author of more than two hundred papers. He belongs to the editorial committee of several scientific journals: such as Comptes rendus Académie des Sciences Paris, Computational Mechanics, International Journal of Solids & Structures…
J. Zarka, , is now the Scientific Director of CADLM. He has covered all the problems in high technology: His previous interests were in micromechanical constitutive modellings, numerical analysis of structures, new formulations and simplified analysis of inelastic structures, non-destructive tests. His current research interests are towards a new approach for Advanced Intelligent optimal Design of materials and Structures, control of fabrication, fatigue and survey of structures i.e. into problems where we know that we do not know the full answer and where however an answer has to be proposed. He published several books in plasticity and optimal design. He is the author of more than one hundred papers. j.zarka@cadlm.fr Prof. Joel Frelat received his Docteur-es-sciences in 1981. He was a researcher at the Laboratoire de Mécanique des Solides, Ecole Polytechnique, France where he had his main interests in modeling and numerical simulation of structures, and non-destructive measurements of residual stresses. He was in charge of research projects for three years at the Direction de la Recherche of Electricité de France. He is now Associate Professor at Ecole Polytechnique and Chargé de Recherches au CNRS au Laboratoire Modélisation Mathématique Université Paris.joel.frelat@lmm.jussieu.fr Dr Habib Karaouni, is now the chief of the departement Advanced Intelligent Design of Structures (A.I.D.S.) at CADLM. In 2001, he got his PhD from Ecole Polytechnique (France) on "Nouveaux Outils pour la Conception Fiable des Assemblages Soudés". He is an specialist in fatigue under variable amplitude multiparameter loadings artificial intelligence, inelastic analysis of structures and optimal design. h.karaouni@cadlm.fr Dr. Hubert Maigre, is Chargé de Recherches au CNRS; he was at the Laboratoire de Mécanique des Solides, Ecole Polytechnique until Sept 2004 where he was working with Prof. H.D. Bui. He has just reached the LAMCOS at INSA. His specialities are in dynamical crack propagation with special focus on experimental measurements of dynamical stress intensity factors and on inverse methods in defects detection (cracks, faults, decohesive surfaces). Hubert.maigre@insa-lyon.fr Prof. Habibou Maitournam, H. Maitournam is a senior associate professor at Ecole Polytechnique and Researcher at the Laboratoire de Mécanique des Solides, Ecole Polytechnique. His main interests are on numerical simulation of structures under cyclic loadings and the prediction of life time. He is also involved in the modelling and the optimization of many industrial processes in order to evaluate their effects on the design of structures. habibou@lms.polytechnique.fr Professor Michael P. Wnuk teaches Engineering Mechanics at the University of Wisconsin – Milwaukee. He has taught and performed research at various schools in the United States, including Michigan State University, Stanford University, California Institute of Technology and Northwestern. He is one of the co-founders and a co-chairman of the International Conference and Research Workshops on Mesomechanics to merge interdisciplinary research of high-tech nature involving Physics at nano-scale, Materials Engineering and Mechanics. Since 1987, Dr. Wnuk serves as President of the “Panslavia International Research Institute, Inc.”, which assists multinational partners in trade, science and technology transfer with particular emphasis on global problems of ecology and medical R&D. mikewnuk@mchsi.com |
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