Evaluating the Relationships Between Surface Roughness and Friction Behavior During Metal Forming 2005-01-0500
The inhomogeneous distribution of surface asperities generated by deformation induces variability in the friction and initiates strain localizations during metal forming. The friction literature generally does not account for the strong influence localized variations in material properties have on the friction behavior. A prototype apparatus was developed that measures the friction behavior under simulated forming conditions and enables detailed characterization of the influences of the microstructure and the topographical conditions that occur under those conditions. The results demonstrate that the measurement system can resolve subtle real-time changes in the dynamic friction coefficient, and that a correlation could exist between the largest surface asperities and the largest variations in the measured friction coefficient.
M. R. Stoudt, J. B. Hubbard, S. P. Mates, D. E. Green
Materials Science & Engineering Laboratory, National Institute of Standards and Technology, Mechanical Engineering Department, University of Windsor
SAE 2005 World Congress & Exhibition
Innovations in Modeling and Testing of Steel Structures for Automotive Applications, and Front and Rear Bumper Systems-SP-1954, SAE 2005 Transactions Journal of Materials and Manufacturing-V114-5