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Développement d’une méthode de mesure de champs cinématiques pour étudier la coupe à chaud

Communication avec acte
Author
MOULART, Raphaël
FOUILLAND-PAILLE, Laurence
ccEL MANSORI, Mohamed
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/9815
Date
2015

Abstract

Ce travail se concentre sur le développement d’une technique de mesure de champs cinématiques pour l’étude des phénomènes se déroulant lors de la découpe à chaud d’alliages métalliques. Le développement d’une méthode de mesure permettant d’observer le comportement mécanique à ces températures élevées (environ 1000°C) reste un challenge. Ce travail se propose de relever ce défi. Des cartes de déformations et de vitesses de déformation ont été obtenues grace à l’élaboration d’un mouchetis résistant à la température couplé avec un système d’observation ad hoc pour permettre une étude cinématique locale lors de la découpe à chaud de la pièce à l’aide de la corrélation d’images numériques.
 
The present study is focused on the development of a kinematic full-field measurement technique for the study of phenomena taking place during hot cutting of metallic alloys. Developing an instrumentation to observe the mechanical behavior at such high temperatures (about 1000°C) remains a challenging task. The present work proposes to rise to this challenge. Strain and strain rate maps have been obtained by developing a thermo-proof speckle pattern coupled with an ad hoc observing system to allow a local kinematic study of the part during the hot cutting thanks to digital image correlation (DIC).
 

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