A Fracture mechanical and anisotropic fem model of the "Reconwood Joint" and experimental verification

Jesper Kierkegaard Hansen, Mads Friborg Nielsen, Seren Gustenhoff Hansen*, Anja Kunic, Roberto Naboni

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Contemporary capabilities in timber fabrication have encouraged the advancement of robotic manufacturing and assembly. In this paper, the ReconWoodjoint, a new type of reversible joint conceived for robotic timber assembly is investigated. Thejoint use CNC milled shear-keys to ensure enhanced shear capacity and more ductile behaviour over the conventional dowel-type connection. More specifically, we here establish a method for the modelling and structural analysis of such joint where the complex nature of timber is tackled by using material laws which are readily available in most commercial FE software. The paper presents a hybrid material model using the Hill Criterion in combination with fracture mechanics (CZM) to appropriately describe these behaviours. The material model is implemented in a three-dimensional FEM model to simulate the joint's mechanical behaviour, and a test series is presented to validate the modelling approach. The results show that the model is able to predict the mechanical response with great precision, both in relation to the stiffness, ultimate strength, and failure mode.

Original languageEnglish
Title of host publication13th World Conference on Timber Engineering, WCTE 2023
EditorsAnders Q. Nyrud, Kjell Arne Malo, Kristine Nore, Knut Werner Lindeberg Alsen, Saule Tulebekova, Efthymia Ratsou Staehr, Gabrielle Bergh, Wendy Wuyts
PublisherWorld Conference on Timber Engineering (WCTE)
Publication date2023
Pages1252-1260
ISBN (Electronic)9781713873297
DOIs
Publication statusPublished - 2023
Event13th World Conference on Timber Engineering: Timber for a Livable Future, WCTE 2023 - Oslo, Norway
Duration: 19. Jun 202322. Jun 2023

Conference

Conference13th World Conference on Timber Engineering: Timber for a Livable Future, WCTE 2023
Country/TerritoryNorway
CityOslo
Period19/06/202322/06/2023
SponsorAanesland Treindustri, et al., Moelven, Paper Province, Region Varmland, Sweco

Keywords

  • Anisotropy
  • Experiments
  • Fracture mechanics
  • Solid 3D F E M
  • Timberjoint

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