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1. The elastohydrodynamic (EHD) regime
1.1 The lubricated hertzian contact
Hertzian contacts are those subjected to high Hertz pressures in excess of 200 MPa.
EHD lubrication occurs in contacts between non-conforming surfaces, which are subject to a punching effect: mainly between gear teeth, in bearings in contact with the track/rolling element, and in cam/push-button contacts.
It is also found in biomechanics, in the joints of the lower limbs. Contact pressure is very low (in the megapascal range), but porous, water-rich cartilage has a very low Young's modulus of the order of 10 to 100 MPa (
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The elastohydrodynamic (EHD) regime
Bibliography
Directory
FRANCE
LamCos, Contact and Structure Mechanics Laboratory, INSA Lyon http://lamcos.insa-lyon.fr/
LTDS, Tribology and Systems Dynamics Laboratory, École Centrale de Lyon http://www.ec-lyon.fr/recherche/laboratoires/ltds
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