Advanced

Fracture analysis of glued laminated timber beams with a hole using a 3D cohesive zone model

Danielsson, Henrik LU and Gustafsson, Per-Johan LU (2014) In Engineering Fracture Mechanics 124. p.182-195
Abstract
Introducing a hole in a glued laminated timber (glulam) beam generally results in a significant decrease in load bearing capacity. Global strength is most often limited by perpendicular to grain fracture with crack initiation at hole periphery and crack propagation in the grain direction. Strength analysis and design is far from trivial, which is reflected by the lack of design criteria in contemporary engineering design codes. This paper presents nonlinear 3D FE-analyses of beams with a hole, carried out using a cohesive zone model based on plasticity theory. Results of numerical analyses are compared to experimental tests showing good agreement. Results of a numerical parameter study relating to beam width and growth ring pattern are... (More)
Introducing a hole in a glued laminated timber (glulam) beam generally results in a significant decrease in load bearing capacity. Global strength is most often limited by perpendicular to grain fracture with crack initiation at hole periphery and crack propagation in the grain direction. Strength analysis and design is far from trivial, which is reflected by the lack of design criteria in contemporary engineering design codes. This paper presents nonlinear 3D FE-analyses of beams with a hole, carried out using a cohesive zone model based on plasticity theory. Results of numerical analyses are compared to experimental tests showing good agreement. Results of a numerical parameter study relating to beam width and growth ring pattern are presented, showing decreasing nominal beam strength with increasing beam width and that the beam strength is affected by the growth ring pattern. Furthermore, some analyses of the influence of different types of initial cracks are presented. (C) 2014 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Wood, Glued laminated timber, Hole, Fracture, Cohesive zone modeling
in
Engineering Fracture Mechanics
volume
124
pages
182 - 195
publisher
Elsevier
external identifiers
  • wos:000338816700013
  • scopus:84902075907
ISSN
1873-7315
DOI
10.1016/j.engfracmech.2014.04.020
language
English
LU publication?
yes
id
dd121d7c-99ba-4f6e-9910-611d56a0493f (old id 4598993)
date added to LUP
2014-09-05 09:01:36
date last changed
2017-04-09 04:04:27
@article{dd121d7c-99ba-4f6e-9910-611d56a0493f,
  abstract     = {Introducing a hole in a glued laminated timber (glulam) beam generally results in a significant decrease in load bearing capacity. Global strength is most often limited by perpendicular to grain fracture with crack initiation at hole periphery and crack propagation in the grain direction. Strength analysis and design is far from trivial, which is reflected by the lack of design criteria in contemporary engineering design codes. This paper presents nonlinear 3D FE-analyses of beams with a hole, carried out using a cohesive zone model based on plasticity theory. Results of numerical analyses are compared to experimental tests showing good agreement. Results of a numerical parameter study relating to beam width and growth ring pattern are presented, showing decreasing nominal beam strength with increasing beam width and that the beam strength is affected by the growth ring pattern. Furthermore, some analyses of the influence of different types of initial cracks are presented. (C) 2014 Elsevier Ltd. All rights reserved.},
  author       = {Danielsson, Henrik and Gustafsson, Per-Johan},
  issn         = {1873-7315},
  keyword      = {Wood,Glued laminated timber,Hole,Fracture,Cohesive zone modeling},
  language     = {eng},
  pages        = {182--195},
  publisher    = {Elsevier},
  series       = {Engineering Fracture Mechanics},
  title        = {Fracture analysis of glued laminated timber beams with a hole using a 3D cohesive zone model},
  url          = {http://dx.doi.org/10.1016/j.engfracmech.2014.04.020},
  volume       = {124},
  year         = {2014},
}