TourTour EHL -  nominal point contact

 Calculation of the Couette-flow film thickness hc
 E1 GPa v1
 E2 GPa v2
 r1x 10-3 m r1y 10-3 m (enter r=0! for plane surface)
 r2x 10-3 m r2y 10-3 m (enter r=0! for plane surface)
 η0 Pas α 10-8 1/GPa
 F N U m/s
 
 E' GPa R' mm L
 a 10-3 m b 10-3 m N
 pm GPa pmax GPa H
 Couette-flow film thickness hc m
 
 Nomenclature
 E1 Young's modulus surface 1 [GPa]
 E2 Young's modulus surface 2 [GPa]
 v1 Poisson constant surface 1 [-]
 v2 Poisson constant surface 2 [-]
 E' reduced Young's modulus [GPa]
 r1x contact radius surface 1 in x-direction [m]
 R' reduced contact radius [m]
 a half contact width in x-direction [m]
 b half contact width in y-direction [m]
 F load [N/mm]
 U effective velocity (u1+u2) [m/s]
 pm mean contact pressure [GPa]
 pmax maximum contact pressure [GPa]
 L dimensionless viscosity [-]
 N dimensionless elasticity [-]
 H dimensionless film thickness [-]
 hc Couette-flow film thickness [m]
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