Distortional hardening plasticity model for paperboard

Research output: Contribution to journalArticle


A distortional hardening elasto-plastic model at finite strains suitable for modeling of orthotropic materials is presented. As a prototype material, paperboard is considered. An in-plane model is established. The model developed is motivated from non-proportional loading tests on paperboard where the paperboard is pre-strained in one direction and then loaded in the perpendicular direction. A softening effect is revealed in the pre-strained samples. The observed experimental findings cannot be accurately predicted by current models for paperboard. To be able to model the softening effects, a yield surface based on multiple hardening variables is introduced. It is shown that the model parameters can be obtained from simple uniaxial experiments. The model is implemented in a finite element framework which is used to illustrate the behavior of the model at some specific loading situations and is compared with strain fields obtained from Digital Image Correlation experiments.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Mechanical Engineering


  • Distortion hardening, Paperboard, Anisotropy, Plasticity, Finite strains, Polyconvexity
Original languageEnglish
Pages (from-to)2411-2423
JournalInternational Journal of Solids and Structures
Issue number13
Publication statusPublished - 2014
Publication categoryResearch