Fracture analysis of glued laminated timber beams with a hole using a 3D cohesive zone model
Författare
Summary, in English
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.
Avdelning/ar
Publiceringsår
2014
Språk
Engelska
Sidor
182-195
Publikation/Tidskrift/Serie
Engineering Fracture Mechanics
Volym
124
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Mechanical Engineering
Nyckelord
- Wood
- Glued laminated timber
- Hole
- Fracture
- Cohesive zone modeling
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1873-7315