An anisotropic elasto-plastic constitutive model of paper material is presented. It is formulated in a spatial setting in which anisotropic properties are accounted for by use of structural variables. A multiplicative split of the deformation gradient is employed to introduce plasticity. A similar approach is used to model the plastic deformation of the substructure. The yield surface adopted is based on the Tsai-Wu failure criterion, used previously to model failure of paper material. A non-associated plasticity theory is employed to calibrate the model to experimental data. It turns out that a multi-axial loading situation is needed to calibrate the model and here a biaxial tension test is audited. The model was implemented into a finite element environment and the creasing process of a corrugated board panel is investigated. © 2008 Elsevier Ltd. All rights reserved.
Harrysson, A., & Ristinmaa, M. (2008). Large strain elasto-plastic model of paper and corrugated board. International Journal of Solids and Structures, 45(11–12), 3334–3352. https://doi.org/10.1016/j.ijsolstr.2008.01.031