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Distortional hardening plasticity model for paperboard

In English

Författare

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.

Publiceringsår

2014

Språk

Engelska

Sidor

2411-2423

Publikation/Tidskrift/Serie

International Journal of Solids and Structures

Volym

51

Issue

13

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Mechanical Engineering

Nyckelord

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

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0020-7683