Abstract
Assuming a rigid viscoplastic material model, it is shown thatthe velocity fields adjacent to surfaces of maximum friction mustsatisfy sticking conditions. This means that the stress boundarycondition, the maximum friction law, may be replaced by the velocityboundary condition. Axisymmetric flows without rotation and planar flowsare considered. Applications of the upper bound theorem are discussed.
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Alexandrov, S., Alexandrova, N. On the Maximum Friction Law in Viscoplasticity. Mechanics of Time-Dependent Materials 4, 99–104 (2000). https://doi.org/10.1023/A:1009851621518
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DOI: https://doi.org/10.1023/A:1009851621518