Determining the Shear Modulus of Sitka Spruce from Torsion Tests.

Khokhar, Aamir Muhammad, Zhang, Hexin, Ridley-Ellis, Daniel and Moore, John (2008) Determining the Shear Modulus of Sitka Spruce from Torsion Tests. Proceedings of the 10th World Conference on Timber Engineering, Miyazaki 2008 (Paper ).

Available under License Creative Commons Attribution Non-commercial.

Download (199kB)


This paper presents details of the experimental method, and preliminary results from, a series of torsion tests undertaken to evaluate the shear modulus of Sitka spruce (Picea sitchensis) timber. Direct torsion tests were used to determine the variation of shear modulus within and between pieces of timber with rectangular cross-sections and with lengths ranging from 1 m up to 3.6 m. Preliminary results obtained indicate that there was considerable variation in shear modulus between pieces of timber tested, but that there was no relationship with the modulus of elasticity in bending, or knot area. Approximately 33 percent of the variation in shear modulus was due to variation along the length of a piece of timber sample. More detailed investigation of the shear transfer mechanism within a timber beam is required, particularly to identify those physical and anatomical characteristics which influence the shear properties.

Item Type: Article
Related URLs:
Uncontrolled Keywords: Torsion; Shear; Timber; Wood; Sitka spruce;
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
Dewey Decimal Subjects: 600 Technology > 690 Building & construction > 694 Wood construction & carpentry
600 Technology > 620 Engineering > 624 Civil engineering
Library of Congress Subjects: T Technology > TA Engineering (General). Civil engineering (General)
S Agriculture > SD Forestry
Item ID: 2527
Depositing User: Dr. Daniel Ridley-Ellis
Date Deposited: 06 Apr 2009 14:16
Last Modified: 23 Mar 2015 14:42

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics

Edinburgh Napier University is a registered Scottish charity. Registration number SC018373