Publication

Conception d’actionneurs basés sur une membrane ferro-élastique

2015
Student Projects

Abstract

La nouvelle frontière des matières ‘smart’ propose de plus en plus des matériaux qui, soumis à l’action d’un champ d’excitation externe (thermique, magnétique, électrique), sont capables de produire un travail mécanique. Le but du projet est la création d’une membrane ‘ferro-élastique’ (membrane élastique incorporant des particules magnétiques) capable de réaliser une déformation macroscopique (quelques millimètres) lorsqu’elle est soumise à un champ magnétique. Après un bref état de l’art et une familiarisation avec ce matériel, une modélisation par éléments finis (FEM) pourra être développée ainsi que la conception d’un prototype fonctionnel. La recherche d’applications finales à l’aide de cette membrane fera partie du projet ainsi que la conception de l’un d’entre eux. Parmi les applications possibles, nous trouvons toutes sortes de pompes, de surfaces haptiques, de modules de déplacements d’objets délicats.

Official source

https://infoscience.epfl.ch/entities/publication/65712d62-d986-41ef-9f12-036aba3dbf72

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2015
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/65712d62-d986-41ef-9f12-036aba3dbf72

About this result

Related concepts (2)

Vis viva

Vis viva (from the Latin for "living force") is a historical term used to describe a quantity similar to kinetic energy in an early formulation of the principle of conservation of energy. Proposed by Gottfried Leibniz over the period 1676–1689, the theory was controversial as it seemed to oppose the theory of conservation of quantity of motion advocated by René Descartes. Descartes' quantity of motion was different from momentum, but Newton defined the quantity of motion as the conjunction of the quantity of matter and velocity in Definition II of his Principia.

Conservation of energy

In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another. For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes. If one adds up all forms of energy that were released in the explosion, such as the kinetic energy and potential energy of the pieces, as well as heat and sound, one will get the exact decrease of chemical energy in the combustion of the dynamite.