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Effect of cross grain on stress waves in lumber

Effect of cross grain on stress waves in lumber

Research Paper, Forest Products Laboratory, USDA Forest Service (FPL 368): 9

An evaluation was made of the effect of cross grain on the transit time of longitudinal compression stress waves in Douglas fir 2X8-inch lumber. Cross grain caused the stress waves to advance with a contour skewed in the direction of the grain angle. Transit time varied with the method of timing. Stress-wave MOE was closest to the static bending MOE when av. time was used.

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Accession: 000865041

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