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Modeling Friction Wedges: Part II — An Improved Model

[+] Author Affiliations
Peter E. Klauser

Engineering Consultant

Paper No. IMECE2004-61095, pp. 77-85; 9 pages
doi:10.1115/IMECE2004-61095
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Rail Transportation
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Rail Transportation Division
  • ISBN: 0-7918-4719-5 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

Friction wedges are a critical but imperfectly understood component in the typical North American three-piece freight car truck. A companion paper has reviewed the “state-of-the-art” in modeling this crucial suspension element. This paper proposes a new and considerably more complex wedge model. Among the features of the model are the ability to represent shear compliance of the wedge faces and varying normal and tangential pressure distributions on the faces, as well as explicit modeling of column toe-in and toe-out. The model is implemented using the VAMPIRE® vehicle dynamics package developed by AEA Technology plc. Sample results are presented for a standard metal wedge and a design with a resilient pad on the slope surface. Directions for further developments are proposed.

Copyright © 2004 by ASME
Topics: Friction , Modeling , Wedges

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