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Modélisation hybride du frottement local à l'interface outil-copeau en usinage des alliages métalliques

Abstract : In this research work, a hybrid (analytical-numerical) approach has been performed in machining of metallic alloys. The thermomechanical model of material flow in the primary shear zone, the tool-chip contact length and the sticking and sliding contact parts have been obtained by an analytical approach. The numerical analysis has been introduced in order to solve the non linear thermal problem on the chip using Finite Element Method. The sticking and sliding zones have been taking into account considering a velocity field in accordance with experimental observations. It has been shown that the coexistence of a sticking and sliding contacts strongly influence the state of stresses and temperature distribution at the tool-chip interface. The proposed approach allows analyzing with a small computation time, the effect of machining parameters (cutting conditions, tool geometry, etc.) on the tribological behaviour of the contact. A relationship between the apparent friction coefficient (obtained by experimental data), the local friction coefficient and the thermomechanical behaviour has been established through a new physical friction law.
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https://pastel.archives-ouvertes.fr/pastel-00602396
Contributor : Mohamed Slim Bahi <>
Submitted on : Wednesday, June 22, 2011 - 1:34:55 PM
Last modification on : Wednesday, November 29, 2017 - 2:55:45 PM
Long-term archiving on: : Friday, September 23, 2011 - 2:21:42 AM

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Bahi Mohamed Slim. Modélisation hybride du frottement local à l'interface outil-copeau en usinage des alliages métalliques. Génie mécanique [physics.class-ph]. Arts et Métiers ParisTech, 2010. Français. ⟨NNT : 2010ENAM0041⟩. ⟨pastel-00602396⟩

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