Abstract
Steady Couette-type flow of rigid/linear-hardening solids is investigated. Material behaviour is governed by the von-Mises flow rule. The general flow problem is reduced to a semi-coupled system of two partial differential equations. A few possible boundary conditions are suggested. An exact solution for the plane strain problem is derived. That solution is used, in conjunction with average stress boundary data, for simulating a simple Couette-type flow problem through a curved tube with a rectangular cross section. It is shown that wall friction induces plastic boundary layers into the material. The essential features of these boundary layers are discussed.
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