0
RESEARCH PAPERS

Assessment of Nominal Contact Area Parameters by Means of Ultrasonic Waves

[+] Author and Article Information
Francesco Aymerich

Massimiliano Pau

Department of Mechanical Engineering, University of Cagliari, Piazza d’Armi, 09123 Cagliari, Italy

J. Tribol 126(4), 639-645 (Nov 09, 2004) (7 pages) doi:10.1115/1.1760764 History: Received May 28, 2003; Revised March 18, 2004; Online November 09, 2004
Copyright © 2004 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Calculation procedure for the nominal contact area starting from the Fuji film stains: use of the whole binarized image.
Grahic Jump Location
Calculation procedure for the nominal contact area starting from the Fuji film stains: use of the mean value of the diameter.
Grahic Jump Location
Effect of the deconvolution procedure on the contact diameter value: the decrease observed is about 10 percent (60 mm diameter sphere, 10 kN load).
Grahic Jump Location
Stains obtained from the Fuji HS Prescale film for the 100 mm sphere
Grahic Jump Location
Cross profile of the transducer impulse response for the 10 MHz focused probe employed in the experimental tests
Grahic Jump Location
Schematic representation of the experimental setup. In the first stage the contact was tested by scanning the region with the ultrasonic probe: in the second stage, a sheet of pressure sensitive film was interposed between the sphere and the plate.
Grahic Jump Location
Example of contact area visualization obtained from the ultrasonic test for the case ‘cylinder (500 mm diameter) versus rail’ contact 25
Grahic Jump Location
Evolution of the contact diameter after the deconvolution processing of raw ultrasonic reflection data
Grahic Jump Location
Contact maps obtained in ultrasonic tests for a 10 kN load
Grahic Jump Location
Diameters of the contact circle extracted from ultrasonic data (60 mm diameter sphere, 10 kN load)
Grahic Jump Location
Evolution of contact area features as obtained from the ultrasonic raw data: it is clearly visible that starting from a load of 6 kN the reflection (thus contact pressure) remains constant while only the diameter tends to increase (40 mm diameter sphere).
Grahic Jump Location
Example of a diametrical section of a contact circle as obtained from the Fuji film: the dotted line denotes the gray threshold chosen for calculation (100 mm diameter sphere, 10 kN load).
Grahic Jump Location
Variation in the diameter of the contact circle with the applied load: comparison between the ultrasonic and Fuji film results for all tested spheres.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In