A 3D study of the influence of friction on the Adiabatic Shear Band formation during High Speed Machining

Lionel Fourment (1) , Fabien Delalondre (1)

1 CEMEF - Centre de Mise en Forme des Matériaux

Adiabatic Shear Band (ASB) may form at very high speeds with materials having poor thermal conductivity. It results from the competition between plastic hardening and strain softening and initiates when the latter becomes predominant. Because of high speeds, the heat created does not have sufficient time to propagate, leading to the formation of high strain localized zones. Starting from a previous description of the ASB formation process where the friction phenomenon has been considered as negligible, the aim of this paper is to describe the influence of the latter on the ASB formation process. Consequently, using a very general 3D finite element code where mesh adaptation is triggered by an error estimator within an Arbitrary Lagrangian Eulerian formulation, the formation of several ASB has been simulated in 3D High Speed Machining taking friction into account. The results obtained allow proposing a description of its influence on both the ASB build up process and the final chip geometry.

Mots clés: Adiabatic Shear Band; High Speed Machining; Segmented Chip; Friction; Adaptive Remeshing

Domaines: Matériaux

Lionel Fourment, Fabien Delalondre. A 3D study of the influence of friction on the Adiabatic Shear Band formation during High Speed Machining. 11th ESAFORM Conference on Material Forming, Apr 2008, Lyon, France. pp.Pages 1415-1418, ⟨10.1007/s12289-008-0101-5⟩. ⟨hal-00510339⟩