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Announcement of CIMS Seminar

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Announcement of CIMS Seminar

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  1. SPEAKER: Prof. Joseph Zarka, Scientific Director of CADLM TITLE:OPTIMAL DESIGN OF WOVEN COMPOSITE MATERIALSDATE:Friday,April 28th, 2006, 3:30-4:30pmPLACE:MEB 134 (Coffee and cookies are served)ABSTRACT: The lecture will be an example of multi-level modeling and multi-disciplinary optimization. Textile composite materials with woven fabrics have efficient properties. The description of the process is rather difficult: fibers are used to make bundles that are then intertwined according several types. In the case of these woven composites, idealized geometry and even uses of the finite element method due to the complex geometry, were done to obtain their characterization. The simulated results are sometimes near from the real experimental ones, but very often they do not give sufficient elements to be used into the real design.Nowadays, it is necessary to reduce their acquisition cost while improving the life cycle and safety of the structures: low cost high quality ! A real challenge for the future. Indeed, the challenge is the following one: how to design the optimal woven composite (i.e. to give the composition and the process) for any special application when, only a few tests are available (due to the cost in money and time) and when the simulated predictions are not reliable. A special tool was built and it allows to control the ~50 active parameters and to have the optimal formulation (i.e. type and concentration of fiber in each bundle) and process (i.e. weight, porosity, hybridization ratio, thickness) for which the fabric will satisfy the requirements for the mechanical properties (elastic and ultimate) and the electromagnetic properties (permittivity and tangent of loss) at the lowest cost. Announcement of CIMS Seminar • Prof. Joseph Zarka is now the Scientific Director of CADLM, a company specially dedicated to provide powerful, user-friendly and affordable tools and services for the Computed Aid Design, Engineering simulations and Optimization for mechanical, civil-engineering, transportation, off-shore, military industries. In the past, he held these positions as well: • 1964-2004: Directeur de Recherches au CNRS au Laboratoire de Mécanique des Solides, Ecole Polytechnique,  France • 2004: Part-time Professor at Mc Gill University (Canada)  • 1996: Part-time visiting scientist at the Center of Excellence for Advanced Materials at University of San Diego California (USA)  • 1981-1986: Scientific Director of Centre Etudes Techniques des Industries Mécaniques (CETIM) • 1981-1983: Associate Professor at Ecole Polytechnique • 1976-1981: Professor and Chairman of the Materials-Structures Departement at Ecole Nationale Supérieure des Techniques Avancées (ENSTA)

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