Experimental investigation of mesoscale variability of clear spruce mechanical properties in the radial direction. (8th February 2021)

• Record Type: Journal Article
• Authors: Farajzadeh Moshtaghin, Alireza; Franke, Steffen; Keller, Thomas; Vassilopoulos, Anastasios P.
• Is Part Of: Construction & building materials. Volume 270(2021)
• Publication Date: 2021-02-08
• Subjects: Clear spruce -- Transverse mechanical properties -- Variability -- Mesoscale -- Length effect; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2020.121401
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Experimental campaign on transverse tensile properties of clear spruce wood. The size effect (specimen length) was investigated. High statistical variability was observed for effective modulus. Spatial variability was observed for the mechanical properties. Abstract: The aim of this work is the investigation of mesoscale/local variability in mechanical properties of clear timber in the radial direction. Clear Norway spruce wood, Picea abies, was used for cutting specimens of different lengths with a small cross-sectional area of 4 × 4 mm 2, in the radial direction of timber boards, and tested under tensile loading. In some boards, specimens were positioned regularly and, in some others, randomly, and local deformations in each specimen were measured during the tests. The results indicate a significant variability in the specimens' elastic moduli and strengths. A correlation between the mesostructure of clear timber and mesoscale/local variability of the transverse elastic modulus in the specimens was observed. Specimens' failures were classified and a reasonable correlation with the corresponding strength values was observed.