Abstract
The Bay–Wanheim's generalized friction law, developed to model mixed and thin film lubrication cases, is implemented in an industrial finite element software. Both the axisymmetric and 3D formulations are presented. These developments are validated on the ring compression test and numerical, experimental and analytical results are then compared. The friction model is then used to improve the development of an upsetting-sliding friction test devoted to the analysis forming sequences leading to medium or high contact pressures. A new methodology to identify Bay–Wanheim's friction factor from this test is also described. The advantages of this model over Coulomb's friction model are also discussed.
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