Temperature dependent micromechanics-based friction model for cold stamping processes

C. Wang*, J. Hazrati, M.B. de Rooij, M. Veldhuis, B. Aha, E. Georgiou, D. Drees, A.H. van den Boogaard

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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    Abstract

    Temperature rise in cold stamping processes due to frictional heating and plastic deformation of sheet metal alters the tool-sheet metal tribosystem. This is more prominent in forming advanced high strength steels and multi-stage forming operations where the temperature on the tool surface can rise significantly. The rise in temperature directly affects the friction due to break down of lubricant, change in physical properties of tribolayers and material behavior. This can result in formability issues such as workpiece-splitting, etc. Therefore, it is important to account for temperature effects on friction in sheet metal forming analyses. In this study, the temperature effect was included in a micromechanics-based friction model which allows calculation of local friction coefficients as a function of contact pressure, bulk strain and relative sliding velocity. The temperature influence on friction was introduced through material behavior of sheet metal, viscosity of lubricant and shear strength of boundary layer in the micromechanics-based model. The model validation has been done by comparing the calculated fractional real contact area with the experimental results. The model can be used in formability analyses and to predict optimum stamping press parameters such as the blank holder force and the press speed.

    Original languageEnglish
    Title of host publicationJournal of physics: Conference series
    PublisherIOP Science
    Number of pages7
    Volume1063
    Edition1
    DOIs
    Publication statusPublished - 6 Aug 2018
    Event11th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2018 - Hotel East 21 Tokyo, Tokyo, Japan
    Duration: 30 Jul 20183 Aug 2018
    Conference number: 11
    http://numisheet2018.org/

    Publication series

    NameJournal of physics: Conference series
    PublisherIOP Publishing Ltd.
    ISSN (Print)1742-6588

    Conference

    Conference11th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2018
    Abbreviated titleNUMISHEET 2018
    CountryJapan
    CityTokyo
    Period30/07/183/08/18
    Internet address

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    Cite this

    Wang, C., Hazrati, J., de Rooij, M. B., Veldhuis, M., Aha, B., Georgiou, E., ... van den Boogaard, A. H. (2018). Temperature dependent micromechanics-based friction model for cold stamping processes. In Journal of physics: Conference series (1 ed., Vol. 1063). (Journal of physics: Conference series). IOP Science. https://doi.org/10.1088/1742-6596/1063/1/012136