General Friction Model Extended by the Effect of Strain Hardening

Chris V. Nielsen, Paulo A.F. Martins, Niels Bay

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Abstract

An extension to the general friction model proposed by Wanheim and Bay [1] to include the effect of strain hardening is proposed. The friction model relates the friction stress to the fraction of real contact area by a friction factor under steady state sliding. The original model for the real contact area as function of the normalized contact pressure is based on slip-line analysis and hence on the assumption of rigid-ideally plastic material behavior. In the present work, a general finite element model is established to, firstly, reproduce the original model under the assumption of rigid-ideally plastic material, and secondly, to extend the solution by the influence of material strain hardening. This corresponds to adding a new variable and, therefore, a new axis to the general friction model. The resulting model is presented in a combined function suitable for e.g. finite element modeling of friction in metal forming, where the material generally strain hardens. The extension of the model to cover strain hardening materials is validated by comparison to previously published experimental data.
Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Tribology in Manufacturing Processes
Publication date2016
Pages35-44
ISBN (Print)978-616-92565-0-2
Publication statusPublished - 2016
Event7th International Conference on Tribology in Manufacturing Processes (ICTMP 2016) - Mövenpick Resort & Spa Karon Beach Phuket, Phuket, Thailand
Duration: 28 Feb 20162 Mar 2016
http://www.ictmp2016.com/

Conference

Conference7th International Conference on Tribology in Manufacturing Processes (ICTMP 2016)
LocationMövenpick Resort & Spa Karon Beach Phuket
CountryThailand
CityPhuket
Period28/02/201602/03/2016
Internet address

Keywords

  • Friction
  • Real contact area
  • Strain hardening

Cite this

Nielsen, C. V., Martins, P. A. F., & Bay, N. (2016). General Friction Model Extended by the Effect of Strain Hardening. In Proceedings of the 7th International Conference on Tribology in Manufacturing Processes (pp. 35-44)