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Keywords: ultrasound
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Journal Articles
Article Type: Research Papers
J. Tribol. July 2011, 133(3): 031501.
Published Online: June 17, 2011
...R. S. Dwyer-Joyce; T. Reddyhoff; J. Zhu The reflection of ultrasound can be used to determine oil film thickness in elastohydrodynamic lubricated (EHL) contacts if the opposing surfaces are fully separated by the liquid layer. The proportion of the wave amplitude reflected depends on the stiffness...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2009, 131(4): 041401.
Published Online: September 21, 2009
... 21 09 2009 failure (mechanical) fatigue rails railway engineering ultrasonic reflection ultrasonic transducer arrays wear wheels wheel-rail contact ultrasound measurement of contact area ultrasonic array The wear and fatigue of railway wheels and rails depends...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2009, 131(2): 021410.
Published Online: March 9, 2009
... only on the interface behavior, specifically its stiffness. In this study, ultrasound was used to investigate the increase in interfacial stiffness with time. A power law relationship between stiffness and hold time was observed for both steel and aluminum surfaces pressed together. An analytical model...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2006, 128(3): 493–504.
Published Online: March 21, 2006
... or surface damage takes place the contact patch size and shape will change. This leads to a redistribution of the contact stresses. The aim of this work was to use ultrasound to nondestructively quantify the stress distribution in new, worn, and damaged wheel-rail contacts. The response of a wheel/rail...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2006, 128(3): 612–618.
Published Online: March 20, 2006
... have identical acoustic properties, and the ultrasound is normally incident, then the well-known quasi-static spring model can be used ( 14 ). In this way, the modulus of the measured reflection coefficient, ∣ R ∣ , is related to the acoustic properties of the three-layer system by ( 15 ): 1...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2001, 123(1): 8–16.
Published Online: September 21, 2000
... of the ultrasonic wave. The sensitivity of the ultrasonic technique has been quantified using a simple model, from which the stiffness of individual gaps and contacts are calculated and their effect on the ultrasonically measured stiffness predicted. The reflection of ultrasound at a static interface between...