End effect on determining shear modulus of timber beams in torsion tests

Research Output

The end effect plays an important role in determining where the rotation measuring gauges should be located in a torsion test. A thorough review on the impact of end effect in a torsion test has been conducted, followed by an experimental validation. A close-ranged photogrammetric method using binocular stereo vision technique was employed in this study. The results have indicated that the end effect has a great impact on a region of 1.5 times the cross-sectional depth of the beam from the supports. Therefore, the distance between the gauges and the supports as specified in BS EN 408:2010+A1:2012 for the torsion test setup is not sufficient for the beams with slender cross-sections. This research has also indicated that it is more appropriate to use the depth of the beam as the referencing dimension to specify this required minimum distance.

Type:

Article
Date:

04 January 2018
Publication Status:

Published
Publisher

Elsevier BV
DOI:

10.1016/j.conbuildmat.2017.12.191
Cross Ref:

S0950061817325965
ISSN:

0950-0618
Library of Congress:

TJ Mechanical engineering and machinery
Dewey Decimal Classification:

621 Electronic & mechanical engineering
Funders:

Lawrence Ho Research Fund

http://researchrepository.napier.ac.uk/output/1031826 Gharavi, N., Zhang, H., Xie, Y., & He, T. (2018). End effect on determining shear modulus of timber beams in torsion tests. Construction and Building Materials, 164, 442-450. https://doi.org/10.1016/j.conbuildmat.2017.12.191

Citation

Gharavi, N., Zhang, H., Xie, Y., & He, T. (2018). End effect on determining shear modulus of timber beams in torsion tests. Construction and Building Materials, 164, 442-450. https://doi.org/10.1016/j.conbuildmat.2017.12.191