The elastoplastic deformation of an isotropic material is described using constitutive equations and allowing for the stress mode. The equations include two nonlinear functions that relate the first and second invariants of the stress and linear-strain tensors to the stress mode angle. It is proposed to use a linear rather than nonlinear relationship between the first invariants of the tensors. This simplification is validated by comparing calculated and experimental strains under loading with constant and variable stress mode angle
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Translated from Prikladnaya Mekhanika, Vol. 46, No. 2, pp. 24–34, February 2010.
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Babeshko, M.E., Shevchenko, Y.N. & Tormakhov, N.N. Approximate description of the inelastic deformation of an isotropic material with allowance for the stress mode. Int Appl Mech 46, 139–148 (2010). https://doi.org/10.1007/s10778-010-0291-7
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DOI: https://doi.org/10.1007/s10778-010-0291-7