Mühlhaus, Hans B.Shi, JingyuOlsen-Kettle, LouiseMoresi, Louis2026-01-012026-01-011861-1125ORCID:/0000-0003-3685-174X/work/162950224https://hdl.handle.net/1885/733799854We propose a double slip non-coaxial plastic model within the framework of a Cosserat continuum theory. In a Cosserat continuum, a material point possesses the degrees of freedom of an infinitesimal rigid body: two translations and one rotation in 2D. We formulate the plastic model into viscous-plastic constitutive relationships and illustrate the viscous-plastic behaviour of the model by means of numerical solution of a simple shear problem.Acknowledgments We would like to acknowledge support from the ARC Discovery Grants DP0985662, DP110103024 and the ongoing support through Auscope/NCRIS. We are also grateful to Lutz Gross, Cihan Altinay and Vince Boros of ESSCC at the University of Queensland for various helps during the preparation of the manuscript.11enCosserat continuumDouble slipFlow ruleNon-coaxial201110.1007/s11440-011-0148-181755185422