EXPERIMENTAL INVESTIGATION OF FINGER JOINTS UNDER TENSILE AND BENDING LOADS

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Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2023
Major/Subject
Mcode
Degree programme
Language
en
Pages
6
671-676
Series
13th World Conference on Timber Engineering, WCTE 2023
Abstract
Finger joints are commonly used to fabricate endless lamella for engineered wood products such as glued laminated timber beams. The finger joints' properties are important for the mechanical characteristics of glued laminated timber beams, particularly those fabricated from higher-strength-graded lamellas. In the present study, 120 spruce timber boards were used to fabricate finger joints. Each timber board was assessed for quality by measuring the eigenfrequency and the density before the finger joint fabrication. The timber boards were cut in half, and both sets were arranged in the same order and afterward fabricated to endless lamellas, such that the finger joints were fabricated from the same timber boards in both sets. On one set, the tensile strength and on the other one, the flatwise bending strength and stiffness were investigated. This paper presents a statistical summary of the finger joint tensile and bending test results and correlation analyses between the mechanical properties and the relevant quality assessment indicators. A significant relationship between the finger joint tensile and bending strength is observed. Furthermore, the dynamic modulus of elasticity is identified to be a useful indicator of finger joint strength and stiffness.
Description
Funding Information: The authors thank Versowood Company for their support and cooperation during specimen fabrication and transportation. This research has been conducted with funding from the Academy of Finland (decision no. 13334004). Publisher Copyright: © (2023) WORLD CONFERENCE ON TIMBER ENGINEERING 2023 (WCTE 2023) All rights reserved.
Keywords
bending experiments, correlation analysis, finger joint, Spruce, tensile experiments
Other note
Citation
Vafadar, F, Collins, S & Fink, G 2023, EXPERIMENTAL INVESTIGATION OF FINGER JOINTS UNDER TENSILE AND BENDING LOADS . in A Q Nyrud, K A Malo, K Nore, K W L Alsen, S Tulebekova, E R Staehr, G Bergh & W Wuyts (eds), 13th World Conference on Timber Engineering, WCTE 2023 . Curran Associates Inc., pp. 671-676, World Conference on Timber Engineering, Oslo, Norway, 19/06/2023 . https://doi.org/10.52202/069179-0091