Voxel-based finite element modelling of wood elements based on spatial density and geometry data using computed tomography

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

In this paper, voxel-based finite element modelling based on spatial geometry and density data is applied to simulate the detailed stress and strain distribution in a large wood element. As example, a moulded wooden tube with a length of 3 m and a diameter of 0.3 m is examined. Gamma-ray computed tomography is used to obtain both, its actual geometric shape and spatial density distribution. Correlation functions (R2 ≈ 0.6) between density and elastic material properties are experimentally determined and serve as link for defining the non-uniform distribution of the material properties in the finite element model. Considering the geometric imperfections and spatial variation of the material properties, a detailed analysis of the stress and strain distribution of a wood element is performed. Additionally, a non-destructive axial compression test is applied on the wooden tube to analyse the load-bearing behaviour. By means of digital image correlation, the deformation of the surface is obtained, which also serves for validation of the finite element model in terms of strain distributions.

Details

Original languageEnglish
Pages (from-to)742-753
Number of pages12
JournalHolzforschung
Volume75
Issue number8
Publication statusPublished - 1 Aug 2021
Peer-reviewedYes

External IDs

Scopus 85099374710

Keywords

Keywords

  • computed tomography, finite element method, spatial distribution, voxel-based meshing, wood moulding