Effect of membrane stress on surface roughness changes in sheet forming

Zhang, S., Hodgson, Peter, Duncan, J.L., Cardew-Hall, M.J. and Kalyanasundaram, S. 2002, Effect of membrane stress on surface roughness changes in sheet forming, Wear, vol. 253, no. 5-6, pp. 610-617, doi: 10.1016/S0043-1648(02)00101-1.

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Title Effect of membrane stress on surface roughness changes in sheet forming
Author(s) Zhang, S.
Hodgson, Peter
Duncan, J.L.
Cardew-Hall, M.J.
Kalyanasundaram, S.
Journal name Wear
Volume number 253
Issue number 5-6
Start page 610
End page 617
Publisher Elsevier
Place of publication Amsterdam, Netherlands
Publication date 2002-09
ISSN 0043-1648
Keyword(s) finite element analysis
surface roughness
membrane stress
Summary Friction plays an important role in sheet metal forming (SMF) and the roughness of the surface of the sheet is a major factor that influences friction. In finite element method (FEM) models of metal forming, the roughness has usually been assumed to be constant; even though it is commonly observed that sheet drawn under tension over a tool radius results in the surface becoming shiny, indicating a major change in surface morphology. An elastic–plastic FEM model for micro-contact between a flat surface and a single roughness peak has been developed. The model was used to investigate the effect of the membrane stress in the sheet on the deformation of an artificial roughness peak. From the simulation results, the change in asperity, or deformation of the local peak, for a given nominal tool contact stress is significantly influenced by the local substrate stress. The height of the asperity decreases with increasing substrate stress and the local pressure is much higher than the nominal pressure. In addition, the local contact stress decreases with an increase in the substrate stress levels.
Notes Available online 28 May 2002.
Language eng
DOI 10.1016/S0043-1648(02)00101-1
Field of Research 091399 Mechanical Engineering not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, Elsevier Science B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001775

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