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International Journal of Forming Processes
1292-7775
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 ARTICLE VOL 10/2 - 2007  - pp.235-269  - doi:10.3166/ijfp.10.235-269
TITLE
Mechanical and Thermal Experiments in Cutting Process for New Behaviour Law

ABSTRACT
High speed machining has been improved thanks to considerable advancement on the tools, on machined materials and finally on the machines. However at such loading velocities, the cutting process generates high strain and high-speed strain which cause complex, various and irreversible phenomena in plasticity. These phenomena are comprehended through the complete measurement of the mechanical actions using a sixcomponent dynamometer and flux/temperatures measurements at the tip of the cutting tool. Balanced energy assessments are the starting points of our reflection on the machining modelling. The modelling of these phenomena and the material behaviour under this type of loading requires a suitable theoretical approach. The main points of the strain gradient theory are developed. An experimental approach is proposed in order to reproduce the shearing strains generated during machining. A friction load, similarly to the secondary shear zone loading, is generated and analysed in detail. Then, the first points of a phenomenon modelling are developed using the strain gradient theory. A theoretical behaviour law adapted to the cutting phenomena is then expressed. The whole of these works can be consulted in (Cahuc, 2005).


AUTEUR(S)
Olivier CAHUC, Philippe DARNIS, Raynald LAHEURTE

KEYWORDS
Experimental Cutting Process, Cutting Model, Strain Gradient, Behaviour Law, Second Gradient Theory, Six-component Dynamometer.

LANGUE DE L'ARTICLE
Anglais

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