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C1 - Friction Law

Constitutive Friction Law for the Description and Optimization of Tailored Surfaces

Project Status: Active

Last Update: 18.07.2019


Phase III of subproject C1 focuses on the holistic numerical and experimental analysis as well as the description of the tribological conditions. In addition to the investigations concerning friction and lubrication based on the results of Phase I and II, Phase III extends the analyses to time-dependent changes of the tool surface. Experimental and numerical approaches are necessary to build up a fundamental understanding. The results of the experimental investigations are used to validate the numerical models. The numerical analyses are used to derive model concepts for the identification of fundamental mechanisms of interaction between surface properties and application behaviour based on the results of phase II. This combined approach enables a focused development of the tribological systems for the SBMF. In order to extend the process limits of SBMF taking into account the operating time, in particular the previous measures have to be further developed and the combined use of tool and workpiece-side modifications systematically investigated. In addition, the adapted tribological systems will be evaluated with regard to their performance as a function of the operating time by numerical and experimental analyses.

Methodology C1

Working Groups



    • Löffler, M.; Schulte, R.; Freiburg, D.; Biermann, D.; Stangier, D.; Tillmann, W.; Merklein, M.: Control of the material flow in sheet-bulk metal forming using modifications of the tool surface. In: International Journal of Material Forming, 12(2019), Springer, pp. 17-26
    • Merklein, M.; Gröbel, D.; Löffler, M.; Henneberg, J.: Investigation on blasted tool surfaces as a measure for material flow control in sheet-bulk metal forming. In: Manufacturing Review, 6(2019)10, pp. 1-9
    • Henneberg, J.; Lucas, H.; Denkena, B.; Merklein, M.: Investigation on the Tribological Behavior of Tool-sided Tailored Surfaces for Controlling the Material Flow in Sheet-Bulk Metal Forning. In: AIP Conference Proceedings 2113 (Edt.): 170002(2019), 22nd International Conference on Material Forming (ESAFORM 2019), pp. 6


    • Löffler, M.; Engel, U.; Willner, K.; Beyer, F.; Merklein, M.: Investigation of the tribolgocal behaviour of microstructures for controlling the material flow in sheet-bulk metal forming. In: CIRP Journal of Manufacturing Science and Technology, 22(2018), pp. 66-75
    • Merklein, M.; Löffler, M.; Gröbel, D.; Henneberg, J.: Material flow control in sheet-bulk metal forming processes using blasted tool surfaces. In: Qin, Y.; Dean, T.A.; Lin, J.; Yuan, S. J.; Vollertsen, F (Edt.): Proceedings of the 5th International Conference on New Forming Technology, (2018), MATEC Web of Conferences, pp. 1-8
    • Freiburg, D.; Aßmuth, R.; Garica, R.; Biermann, D.; Henneberg, J.; Merklein, M.: Adaption of tool surface for sheet-bulk metal forming by means of pressurized air wet abrasive jet machining. In: Production Engineering, (2018), Berlin Heidelberg: Springer, pp. 1 -7
    • Löffler, M.: Steuerung von Blechmassivumformprozessen durch maßgeschneiderte tribologische Systeme. In: Prof. Dr.-Ing. J. Franke, Prof. Dr.-Ing. N. Hanenkamp, Prof. Dr.-Ing. M. Merklein, Prof. Dr.-Ing. M. Schmidt, Prof. Dr.-Ing. S. Wartzack (Edt.): FAU Studien aus dem Maschinenbau, (2018), Erlangen: FAU University Press, published


    • Merklein, M.; Andreas, K.; Kraus, M.; Löffler, M.; Pilz, F.: Development and launching of an application-oriented test rig for wear investigations in sheet-bulk metal forming. In: THE"A" Coatings, (2017), Thessaloniki, GR, pp. 31-40


    • Löffler, M.; Andreas, K.; Engel, U.; Merklein, M.: Applicability of blasted blanks for adaption of tribological conditions in sheet-bulk metal forming. In: Procedia CIRP, 45(2016), pp. 239-242


    • Merklein, M.; Gröbel, D.; Löffler, M.; Schneider, T.; Hildenbrand, P.: Sheet-bulk metal forming – forming of functional components from sheet metals. In: Y. Qin, T.A. Dean, J. Lin, S.J. Yuan, F. Vollertsen (Edt.): Proceedings of the 4th International Conference on New Forming Technology, (2015), MATEC Web of Conferences, pp. 01001 1-12


    • Merklein, M.; Andreas, K.; Gröbel, D.; Hildenbrand, P.; Müller, M.; Noneder, J.; Reiß, A.; Schneider, T.; Vierzigmann, U.: Potenziale und Grenzen der Simulation in der Fertigungstechnik. In: Simufact Engineering (Edt.): Tagungsband 15. RoundTable - Simulating Manufacturing, (2014), Marburg: ISBN: 978-3-9813814-3-6, published
    • Gröbel, D.; Koch, J.; Vierzigmann, U.; Engel, U.; Merklein, M.: Investigations and approaches on material flow of non-uniform arranged cavities in sheet bulk metal forming processes. In: Procedia Engineering, 81(2014), pp. 401-406



      • 26.03.2019: Henneberg, J.: Smart Tool, GCFG Sitzung, Stuttgart


      • 20.09.2018: Henneberg, J.: Material flow control in sheet-bulk metal forming processes using blasted tool surfaces, Bremen


      • 05.04.2017: Löffler, M.; Andreas, K.: Untersuchung des Werkzeugverschleißes in der Blechmassivumformung, GCFG Sitzung Stuttgart
      • 20.09.2017: Löffler, M.: Identification of tribological mechanisms of shot peened steel surfaces for an application in sheet-bulk metal forming, Montreal, Kanada