Advanced friction modeling in sheet metal forming

Hol, J. and Cid Alfaro, M.V. and Meinders, V.T. and Huetink, J. (2011) Advanced friction modeling in sheet metal forming. Key Engineering Materials, 473 . 715 - 722. ISSN 1013-9826

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Abstract:	The Coulomb friction model is frequently used for sheet metal forming simulations. This model incorporates a constant coefficient of friction and does not take the influence of important parameters such as contact pressure or deformation of the sheet material into account. This article presents a more advanced friction model for large-scale forming simulations based on the surface changes on the micro-scale. When two surfaces are in contact, the surface texture of a material changes due to the combination of normal loading and stretching. Consequently, shear stresses between contacting surfaces, caused by the adhesion and ploughing effect between contacting asperities, will change when the surface texture changes. A friction model has been developed which accounts for these microscopic dependencies and its influence on the friction behavior on the macro-scale. The friction model has been validated by means of finite element simulations on the micro-scale and has been implemented in a finite element code to run large scale sheet metal forming simulations. Results showed a realistic distribution of the coefficient of friction depending on the local process conditions.
Item Type:	Article
Copyright:	© 2011 Trans Tech Publications
Faculty:	Engineering Technology (CTW)
Research Chair:	Mechanics of Forming Technology (MFT)
Research Group:	Applied Mechanics (AM)
Link to this item:	http://purl.utwente.nl/publications/76885
Official URL:	http://dx.doi.org/10.4028/www.scientific.net/KEM.473.715
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