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Mixture Model for Graphite Flake Orientation Distribution in a Used Rotor

[+] Author Affiliations
Sandeep Rajput

Infosys Corporation, Bellevue, WA

Manish Paliwal

College of New Jersey, Ewing, NJ

Ajay Mahajan

University of Akron, Akron, OH

Paper No. IMECE2015-50791, pp. V009T12A032; 6 pages
  • ASME 2015 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids
  • Houston, Texas, USA, November 13–19, 2015
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5752-6
  • Copyright © 2015 by ASME


We analyze the deformation of the substrate matrix and the shear forces it is exposed to through the geometry of graphite flakes in the substrate from samples already subjected to breaking pressure applications up to 30 bar. Microscopic Images of the cross-section of the brake pad polished to a 0.1 μm scale were examined. Statistical analysis was conducted, state vectors and variance-co-variance matrix were defined, and considered every state as a distribution. Parameters for each “shear deformation stage” were estimated using Expectation-Maximization algorithm. Finally, a mixture model was identified for the distribution of graphite flakes across the rotor thickness.

Copyright © 2015 by ASME
Topics: Rotors , Graphite



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