Summary
A mathematical investigation is presented of the plane strain viscoplastic flow of a polycrystalline solid, which deforms by slip along microscopic deformation banales. It is demonstrated that the shear angle obeys Laplaces equation and that over the range of strain rates corresponding to thermally activated flow the principal shear stress also remains harmonic. The equation governing the normal stress is also derived. A brief discussion follows concerning the domain of application of these equations.
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Bish, R.L. The flow of a solid by viscous slip between elastic domains. Acta Mechanica 81, 39–45 (1990). https://doi.org/10.1007/BF01174553
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DOI: https://doi.org/10.1007/BF01174553