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Application of bending under tension test to determine the effect of tool radius and the contact pressure on the coefficient of friction in sheet metal forming

Nanayakkara, N.K.B.M.P., Kelly, Georgina and Hodgson, Peter 2005, Application of bending under tension test to determine the effect of tool radius and the contact pressure on the coefficient of friction in sheet metal forming, Materials forum, vol. 29, pp. 114-118.

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Title Application of bending under tension test to determine the effect of tool radius and the contact pressure on the coefficient of friction in sheet metal forming
Author(s) Nanayakkara, N.K.B.M.P.
Kelly, Georgina
Hodgson, Peter
Journal name Materials forum
Volume number 29
Start page 114
End page 118
Publisher IMEA
Place of publication North Melbourne, Vic
Publication date 2005
ISSN 1447-6738
Summary To quantify the frictional behaviour in sheet forming operations, several laboratory experiments which simulate the real forming conditions are performed. The Bending Under Tension Test is one such experiment which is often used to represent the frictional flow of sheet material around a die or a punch radius. Different mathematical representations are used to determine the coefficient of friction in the Bending Under Tension Test. In general the change in the strip thickness in passing over the die radius is neglected and the radius of curvature to thickness ratio is assumed to be constant in these equations. However, the effect of roller radius, sheet thickness and the surface pressure are also omitted in some of these equations. This work quantitatively determined the effect of roller radius and the tooling pressure on the coefficient of friction. The Bending Under Tension Test was performed using rollers with different radii and also lubricants with different properties. The tool radii were found to have a direct influence in the contact pressure. The effect of roller radius on friction was considerable and it was observed that there is a clear relationship between the contact pressure and the coefficient of friction.
Notes Reproduced with the specific permission of the copyright owner.
Language eng
Field of Research 091299 Materials Engineering not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2005, Institute of Materials Engineering Australasia Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002975

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