Experimental and Numerical Investigation on a Pressure Dependent Friction Model

Abstract:

The objective of this paper is the investigation of the implemented pressure dependent friction model in the FE simulation program AutoForm. Since the values for the required parameters of this approach are not defined in the actual FE simulation program, this paper contributes to a first definition of these parameters. Therefore, experimental investigations with the cup drawing tests are carried out. With the support of the experimental results regarding the maximum stamping force, the model is calibrated and subsequently validated by the comparison of the sheet thicknesses of the experimental and numerical investigations. The results of this validation reveal a good accordance of simulation and reality in nearly all areas. However there are also areas in which the prediction accuracy decreases in comparison to the basic simulation. Therefore, additional investigations have to be carried out which concentrate on the modification of this pressure dependent approach towards a better universal prediction accuracy of the simulation.

• Periodical: Key Engineering Materials (Volume 639)
• Pages: 403-410
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.639.403
• Online since: March 2015
• Authors: Fabian Zöller*, Vera Sturm, Marion Merklein
• Keywords: Friction, Simulation, Tribology

References

[1] J. Humphrey, O. Memedovic, The Global Automotive Industry Value Chain: What Prospects for Upgrading by Developing Countries, UNIDO Sectorial Studies, Vienna, (2003).

DOI: 10.2139/ssrn.424560

[2] A. Makinouchi, Sheet metal forming simulation in industry, J. of Mat. Pro. Tech. 60 (1996) 19-26.

[3] J. Filzek, M. Volk, P. Groche, Surface evolution and lubricant distribution in deep drawing, Key Eng. Mat. 554-557 (2013), 811-824.

DOI: 10.4028/www.scientific.net/kem.554-557.811

[4] N. Bay, P. Groche, A. Azushima, M. Merklein, Environmentally benign tribo-systems for metal forming, CIRP Annals - Manufacturing Technology 59 (2010) 760-780.

DOI: 10.1016/j.cirp.2010.05.007

[5] M. Steinicke, Modifiziertes Reibgesetz für die Finite-Elemente-Simulation des Tiefziehens. DGM Informationsgesellschaft, Stuttgart, (2003).

[6] H. Czichos, Tribologie-Handbuch, third ed., Springer, Wiesbaden, (2010).

[7] M. Merklein, F. Zöller, V. Sturm, Experimental and numerical investigations of the tribological conditions in a cup drawing process, Proc. Int. Deep Drawing Research Group Conf. (2014) 28-37.

[8] J. Filzek, M. Ludwig, P. Groche, Improved FEM Simulation of Sheet Metal Forming with Friction Modelling using Laboratory Tests, Proc. of the IDDRG (2011).

[9] H. Czichos, Tribology: a systems approach to the science and technology of friction, lubrication, and wear, third ed., Elsevier, Amsterdam, (1986).

[10] A. Azushima, J. Miyamoto, H. Kudo, Effect of Surface Topography of Workpiece on Pressure Dependence of Coefficient of Friction in Sheet Metal Forming, CIRP Annals (1998) 479-482.

DOI: 10.1016/s0007-8506(07)62879-0

[11] C. Arwidson, L. Bernspang, A. Kaplan, Verification of numerical forming simulation of high strength steels, Int. Conf. on Innovations in Metal Forming (2004).