Failure Theories for Douglas‐Fir in Tension
Publication: Journal of Structural Engineering
Volume 114, Issue 12
Abstract
This study investigated the tensile strength of Douglas-fir loaded at an angle to the grain. Strength was determined for grain angles of 15, 30, 45 and 60 degrees in the radial-longitudinal plane. Strength was found to drop dramatically from a grain orientation of zero to 15 degrees. Hankinson's formula, the Tsai-Hill failure theory and the recently developed hyperbolic formula were compared to the experimental data to determine which theory gave the best prediction. Hankinson's formula with s = 1.5 and n = 2, and the Tsai-Hill theory overstated strength at 15 degrees and did not provide a good prediction of the data at the remaining grain angles. The hyperbolic formula was found to give an accurate prediction of the data at all grain angles tested.
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References
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 114 • Issue 12 • December 1988
Pages: 2808 - 2813
Copyright
Copyright © 1988 ASCE.
History
Published online: Dec 1, 1988
Published in print: Dec 1988
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