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Distortional hardening plasticity model for paperboard

På svenska

Author

Summary, in English

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.

Publishing year

2014

Language

English

Pages

2411-2423

Publication/Series

International Journal of Solids and Structures

Volume

51

Issue

13

Document type

Journal article

Publisher

Elsevier

Topic

  • Mechanical Engineering

Keywords

  • Distortion hardening
  • Paperboard
  • Anisotropy
  • Plasticity
  • Finite strains
  • Polyconvexity

Status

Published

ISBN/ISSN/Other

  • ISSN: 0020-7683