Effect of grain angle on shear strength of Douglas-fir wood

Rakesh Gupta; Arijit Sinha

doi:10.1515/hf-2011-0031

Published by De Gruyter March 21, 2012

Effect of grain angle on shear strength of Douglas-fir wood

Rakesh Gupta and Arijit Sinha

From the journal Holzforschung

https://doi.org/10.1515/hf-2011-0031

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Abstract

The effect of grain angle (GA) on shear strength of Douglas-fir has been evaluated. Shear block specimens with a GA varying from 0 to 90° was loaded in the shear plane, resulting in failure mode transitioning from parallel to grain shear to rolling shear. As expected, shear strength decreased as the GA increased from 0° to 90°. A root-mean-square equation was found to be suitable to predict the relationship between GA and shear strength. Traditional Hankinson formula and the Tsai-Wu criteria were less effective with this regard.

Keywords: mechanical properties; rolling shear; timber mechanics; wood design; wood technology.

Corresponding author. Department of Wood Science and Engineering Oregon State University, Corvallis, OR 97330, USA Phone: +1 541 737 6713 Fax: +1 541 737 3385

Received: 2011-2-23

Accepted: 2012-2-16

Published Online: 2012-03-21

Published in Print: 2012-07-01

Effect of grain angle on shear strength of Douglas-fir wood

Abstract

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