Experimental and Simulative Investigations of Tribology in Sheet-Bulk Metal Forming

Florian Beyer; Heribert Blum; Dustin Kumor; Andreas Rademacher; Kai Willner; Thomas Schneider

doi:10.4028/www.scientific.net/KEM.639.283

Paper Titles

Experimental Verification of a Benchmark Forming Simulation
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Flexible Rolling of Process Adapted Semi-Finished Parts and its Application in a Sheet-Bulk Metal Forming Process
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Locally Adapted Tribological Conditions as a Method for Influencing the Material Flow in Sheet-Bulk Metal Forming Processes
p.267

Influence of Surface Modifications on Friction, Using High-Feed Milling and Wear Resistant PVD-Coating for Sheet-Metal Forming Tools
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Experimental and Simulative Investigations of Tribology in Sheet-Bulk Metal Forming
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Measuring Systems for Sheet-Bulk Metal Forming
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Formability Characteristics of Hot Stamped Ti6Al4V Sheets Electro-Chemically Modified on Surface for Biomedical Applications
p.301

Modeling of the Plastic Characteristics of AA6082 for the Friction Stir Welding Process
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Novel Punch Design for Nonlinear Strain Path Generation and Evaluation Methods
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 639Experimental and Simulative Investigations of...

Experimental and Simulative Investigations of Tribology in Sheet-Bulk Metal Forming

Abstract:

Friction has a considerable influence in metal forming both in economic and technical terms. This is especially true for sheet-bulk metal forming (SBMF). The contact pressure that occurs here can be low making Coulomb’s friction law advisable, but also very high so that Tresca’s friction law is preferable. By means of an elasto-plastic half-space model rough surfaces have been investigated, which are deformed in such contact states. The elasto-plastic half-space model has been verified and calibrated experimentally. The result is the development of a constitutive friction law, which can reproduce the frictional interactions for both low and high contact pressures. In addition, the law gives conclusion regarding plastic smoothening of rough surfaces. The law is implemented in the framework of the Finite-Element-Method. However, compared to usual friction relations the tribological interplay presented here comes with the disadvantage of rising numerical effort. In order to minimise this drawback, a model adaptive finite-element-simulation is performed additionally. In this approach, contact regions are identified, where a conventional friction law is applicable, where the newly developed constitutive friction law should be used, or where frictional effects are negligible. The corresponding goal-oriented indicators are derived based on the “dual-weighted-residual” (DWR) method taking into account both the model and the discretisation error. This leads to an efficient simulation that applies the necessary friction law in dependence of contact complexity.

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Periodical:

Key Engineering Materials (Volume 639)

Pages:

283-290

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.639.283

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Online since:

March 2015

Authors:

Florian Beyer*, Heribert Blum, Dustin Kumor, Andreas Rademacher, Kai Willner, Thomas Schneider

Keywords:

Friction, Model Adaptivity, Simulation

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* - Corresponding Author

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