The film thickness in the piezoviscous-rigid regime; film thickness lubrication regimes transition criteria

This contribution discusses a physical criterion for the transition in the film thickness behavior of concentrated lubricated contacts with full film lubrication. The film thickness regimes as defined by Houpert are reasonably consistent with earlier criteria, as developed by Johnson, Greenwood, and Hooke. Mr. van Leeuwen contributes a list of comments and references.