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

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

Fingerprint

stamping
micromechanics
metal sheets
friction
lubricants
temperature effects
metal forming
temperature
high strength steels
shear strength
blanks
holders
coefficient of friction
plastic deformation
sliding
boundary layers
physical properties
breakdown
viscosity
heating

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
Wang, C. ; Hazrati, J. ; de Rooij, M.B. ; Veldhuis, M. ; Aha, B. ; Georgiou, E. ; Drees, D. ; van den Boogaard, A.H. / Temperature dependent micromechanics-based friction model for cold stamping processes. Journal of physics: Conference series. Vol. 1063 1. ed. IOP Science, 2018. (Journal of physics: Conference series).
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title = "Temperature dependent micromechanics-based friction model for cold stamping processes",
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.",
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Wang, C, Hazrati, J, de Rooij, MB, Veldhuis, M, Aha, B, Georgiou, E, Drees, D & van den Boogaard, AH 2018, Temperature dependent micromechanics-based friction model for cold stamping processes. in Journal of physics: Conference series. 1 edn, vol. 1063, Journal of physics: Conference series, IOP Science, 11th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2018, Tokyo, Japan, 30/07/18. https://doi.org/10.1088/1742-6596/1063/1/012136

Temperature dependent micromechanics-based friction model for cold stamping processes. / Wang, C.; Hazrati, J.; de Rooij, M.B.; Veldhuis, M.; Aha, B.; Georgiou, E.; Drees, D.; van den Boogaard, A.H.

Journal of physics: Conference series. Vol. 1063 1. ed. IOP Science, 2018. (Journal of physics: Conference series).

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

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AB - 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.

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