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A three dimensional plasticity model for perpendicular to grain cohesive fracture in wood

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Author

Summary, in English

A three dimensional cohesive zone model for perpendicular to grain wood fracture analysis is derived within the framework of plasticity theory and implemented for numerical calculations by the finite element method. The criterion used for strain instability and localization to a fracture plane is according to the orthotropic Tsai-Wu criterion accounting for all six stress components. The after localization plastic softening performance is governed by the three out-of-fracture plane stress and deformation components. The material model is applied to analyses of double cantilever beam specimens and end-notched beams. The results show in particular that stress and strength along grain may significantly affect perpendicular to grain fracture. The two dimensional development of the fracture process zone is also studied as affected by varying material principal directions. (C) 2012 Elsevier Ltd. All rights reserved.

Publishing year

2013

Language

English

Pages

137-152

Publication/Series

Engineering Fracture Mechanics

Volume

98

Document type

Journal article

Publisher

Elsevier

Topic

  • Mechanical Engineering

Keywords

  • Wood
  • Fracture mechanics
  • Cohesive zone modeling
  • Plastic theory
  • Tsai-Wu

Status

Published

ISBN/ISSN/Other

  • ISSN: 1873-7315