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Séance de cours

Smart Composites : auto-guérison et détection

Dans cours

MSE-440: Composites technology

The latest developments in processing and the novel generations of organic composites are discussed. Nanocomposites, adaptive composites and biocomposites are presented. Product development, cost analysis and study of new markets are practiced in team work ...

Description

Cette séance de cours couvre le développement de composites intelligents, en se concentrant sur le morphing de forme, la fermeture des fissures et l'intégration d'alliages à mémoire de forme (SMA) et de polymères électro-actifs pour la protection contre les chocs. Il explore l'utilisation de matériaux magnétostrictifs, de concepts d'auto-réparation et de diverses fibres de détection pour la surveillance de la santé structurelle.

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Enseignant·e·s (3)

Véronique Michaud

Background: 1994 Habilitation à diriger des recherches ( INPG, France) 1991 PhD in Materials Engineering ( MIT, USA) 1987 Ingénieur Civil des Mines ( Ecole des Mines de Paris, France) Activités: Depuis Janvier 2018: Vice-Doyenne de la faculté des ingénieurs, en charge de l'éducation. Juin 2012-Dec.2017: Directrice de la Section Science et Génie des Matériaux Depuis Avril 2017, Professeur Associée EPFL 2009-2017 : Professeur Titulaire at EPFL 1997-2009 : collaboratrice Scientifique EPFL 1994-1997 : Chef de Travaux au laboratoire MSS-MAT, Ecole Centrale Paris (France) 1991-1994 : Post-doctoral research associate, MIT (USA) Environ 300 publications of which 140 in peer-reviewed journals

Martyn Douglas Wakeman

Dr. Martyn Wakeman is a seasoned professional in advanced composites with a proven record of 20 yrs, spanning academia and global corporations. He has worked in M&A deep dive projects in the Advanced Composites Space and has a proven publication (80 ) and patent (30) history in the development of continuous fibre thermoplastic composites from formulation, processing, to applications. He is currently attached at 50% to the Laboratory for Processing of Advanced Composites at the EPFL focused on 3D printing and advanced composites and also available as an independent consultant. Prior to this role he worked at DuPont from 2007-2016 in Geneva, Switzerland where he worked to drive the development strategy and led research of the DuPont Vizilon thermoplastic composites offer including continuous carbon and glass reinforced composites. From 1997 to 2007 he was a Scientific Collaborator at the Swiss Federal Institute of Technology, EPFL, in which he was Head of the Composite and Polymer Laboratory's "Industrial implementation group", located in the EPFL science park, focused on the automotive industry both in Europe and North America. He has a PhD in mechanical engineering focused on composites.

Pierre-Etienne Bourban

Background 1990 Ingénieur en science des matériaux 1993 PhD in materials science Activities 1993-1994 Research at the Center for Composite Materials, University of Delaware, USA (ccm.udel.edu), SNSF grant Since 1994 Research and teaching at EPFL, Composites, (LTC, LPAC) 1995-1999 Coordination Swiss Priority Program on Materials research: 2.2: Composites Since 1998 Biocomposites 2004-2009 Direction of the EPFL Transdisciplinary programme in Sport and Rehabilitation 2005-2008 Member of the EPFL Vice-Presidency for Innovation and Valorisation and direction a.i.EPFL-LTC Since 2016 Direction Discovery Learning Labs Materials/Bioengineering and Engineering

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Concepts associés (30)

Matériau composite

vignette|Multicouche, un exemple de matériau composite. Un matériau composite est un assemblage ou un mélange hétérogène d'au moins deux composants, non miscibles mais ayant une forte capacité d'interpénétration et d'adhésion, dont les propriétés mécaniques se complètent. Le nouveau matériau ainsi constitué possède des propriétés avantageuses que les composants seuls ne possèdent pas. Bien que le terme composite soit moderne, de tels matériaux ont été inventés et abondamment utilisés bien avant l'Antiquité, comme les torchis pour la construction de bâtiments.

Shape-memory polymer

Shape-memory polymers (SMPs) are polymeric smart materials that have the ability to return from a deformed state (temporary shape) to their original (permanent) shape when induced by an external stimulus (trigger), such as temperature change. SMPs can retain two or sometimes three shapes, and the transition between those is often induced by temperature change. In addition to temperature change, the shape change of SMPs can also be triggered by an electric or magnetic field, light or solution.

Stress–strain curve

In engineering and materials science, a stress–strain curve for a material gives the relationship between stress and strain. It is obtained by gradually applying load to a test coupon and measuring the deformation, from which the stress and strain can be determined (see tensile testing). These curves reveal many of the properties of a material, such as the Young's modulus, the yield strength and the ultimate tensile strength. Generally speaking, curves representing the relationship between stress and strain in any form of deformation can be regarded as stress–strain curves.

Infinitesimal strain theory

In continuum mechanics, the infinitesimal strain theory is a mathematical approach to the description of the deformation of a solid body in which the displacements of the material particles are assumed to be much smaller (indeed, infinitesimally smaller) than any relevant dimension of the body; so that its geometry and the constitutive properties of the material (such as density and stiffness) at each point of space can be assumed to be unchanged by the deformation.

Finite strain theory

In continuum mechanics, the finite strain theory—also called large strain theory, or large deformation theory—deals with deformations in which strains and/or rotations are large enough to invalidate assumptions inherent in infinitesimal strain theory. In this case, the undeformed and deformed configurations of the continuum are significantly different, requiring a clear distinction between them. This is commonly the case with elastomers, plastically-deforming materials and other fluids and biological soft tissue.

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Séances de cours associées (34)

Contraintes normales: Stress interne et contrainte

Introduit des contraintes internes et des contraintes, des propriétés de matériaux et des considérations de conception pour les charges axiales et le cisaillement direct.

Déformation et rupture dans des matériaux composites

Explore le comportement de déformation et de rupture des matériaux composites, mettant l'accent sur les composites en fibre continue et le rôle de l'interface fibre-matrice.

Matériaux composites: Fibres et matrices

Couvre les propriétés et les processus de production des matériaux composites, en mettant l'accent sur le renforcement des fibres et des matrices.

Matériaux composites: Fondements et applications

Explore les fondamentaux des matériaux composites, y compris le comportement, les propriétés et les mécanismes de défaillance.

Élasticité et déformation

Couvre le stress, la contrainte, le module d'élasticité et le comportement matériel sous différentes charges.

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Concepts associés (30)

Matériau composite

Shape-memory polymer

Stress–strain curve

Infinitesimal strain theory

Finite strain theory

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