Abstract
The accurate description of friction is critical in the finite element (FE) simulation of the sheet metal forming process. Usually, friction is oversimplified through the use of a constant Coulomb friction coefficient. In this study, the application of an existing multiscale friction model is extended to the hot stamping process. The model accounts for the effects of tool and sheet metal surface topography as well as the evolution of contact pressure, temperature, and bulk strain during hot stamping. Normal load flattening and strip drawing experiments are performed to calibrate the model. The results show that the model can relatively well predict friction in strip draw experiments when the tool surface evolution due to wear is incorporated. Finally, the application of the formulated multiscale friction model was demonstrated in the FE simulation of a hot-stamped part.
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Acknowledgements
The authors would like to thank Richard Stegeman, Marco Appelman, Tu Phan, Gerben Botman, and Menno de Bruine for assistance with the measurements and Johan Hol (TriboForm Engineering BV) for the assistance with the import of the COFs in AutoForm.
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Jenny VENEMA. She received her Ph.D. degree in mechanical engineering from University of Twente, the Netherlands, in 2019. Since 2005, she has been a principal researcher in the application department at Tata steel. Her research interests are tribological aspects during forming processes of steel.
Javad HAZRATI. He received his Ph.D. degree in biomechanics from Eindhoven University of Technology, the Netherlands, in 2013. He is currently an assistant professor in nonlinear solid mechanics, University of Twente, the Netherlands. His research interests include friction and wear in material forming and modeling manufacturing processes related to material deformation.
Eisso ATZEMA. He received his Ph.D. degree from the University of Twente in 1994, specialising in applied mechanics used in forming technology. He has been working in forming technology at Tata Steel looking at supporting customers in processing the steel.
David MATTHEWS. He received his Ph.D. degree in applied physics and mathematics from the University of Groningen, the Netherlands, in 2008. Following nine years in industry as a principal researcher at Tata Steel, he is now an associate professor in surface design and engineering at the University of Twente, the Netherlands. His research interests surround the design and manufacture of surfaces for a wide range of applications and environments.
Ton van den BOOGAARD. He received his Ph.D. degree in mechanical engineering from the University of Twente in 2002. Since 2012, he has led the Chair Nonlinear Solid Mechanics and was appointed a full professor in 2015 at the same university. His research interests include mechanics of forming processes, computational material modelling, and process optimization.
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Venema, J., Hazrati, J., Atzema, E. et al. Multiscale friction model for hot sheet metal forming. Friction 10, 316–334 (2022). https://doi.org/10.1007/s40544-021-0504-6
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DOI: https://doi.org/10.1007/s40544-021-0504-6