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A finite element simulation of micro-mechanical frictional behaviour in metal forming

Zhang, S., Hodgson, Peter, Cardew-Hall, M.J. and Kalyanasundaram, S. 2003, A finite element simulation of micro-mechanical frictional behaviour in metal forming, Journal of materials processing technology, vol. 134, no. 1, pp. 81-91.

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Title A finite element simulation of micro-mechanical frictional behaviour in metal forming
Author(s) Zhang, S.
Hodgson, Peter
Cardew-Hall, M.J.
Kalyanasundaram, S.
Journal name Journal of materials processing technology
Volume number 134
Issue number 1
Start page 81
End page 91
Publisher Elsevier
Place of publication Amsterdam, Netherlands
Publication date 2003-03-01
ISSN 0924-0136
Keyword(s) micro-mechanical contact
metal forming
friction behaviour
Summary Friction is a critical factor for sheet metal forming (SMF). The Coulomb friction model is usually used in most finite element (FE) simulation for SMF. However, friction is a function of the local contact deformation conditions, such as local pressure, roughness and relative velocity. Frictional behaviour between contact surfaces can be based on three cases: boundary, hydrodynamic and mixed lubrication. In our microscopic friction model based on the finite element method (FEM), the case of dry contact between sheet and tool has been considered. In the view of microscopic geometry, roughness depends upon amplitude and wavelength of surface asperities of sheet and tool. The mean pressure applied on the surface differs from the pressure over the actual contact area. The effect of roughness (microscopic geometric condition) and relative speed of contact surfaces on friction coefficient was examined in the FE model for the microscopic friction behaviour. The analysis was performed using an explicit FE formulation. In this study, it was found that the roughness of deformable sheet decreases during sliding and the coefficient of friction increases with increasing roughness of contact surfaces. Also, the coefficient of friction increases with the increase of relative velocity and adhesive friction coefficient between contact surfaces.
Notes Available online 27 November 2002.
Language eng
Field of Research 091399 Mechanical Engineering not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2002
Copyright notice ©2002, Elsevier Science B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001782

Document type: Journal Article
Collection: School of Engineering and Technology
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