...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...

... 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 on the contact conditions between the two bodies. Both the location of the contact region...

... 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...

... 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...

.... 1187 – 1194 . Dwyer-Joyce , R. S. , Drinkwater , B. W. , and Donohoe , C. J. , 2003 , “ The Measurement of Lubricant-Film Thickness Using Ultrasound ,” Proc. R. Soc. London, Ser. A 1364-5021 10.1098/rspa.2002.1018 , 459 , pp. 957 – 976 . Zhang , J. , Drinkwater...

... 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...