The Notched Beam Shear Test for Wood

Discusses development of a laterally notched beam specimen for determining the shear strength of wood, and compares the strength values obtained from this test and from the standard shear test of ASTM. Investigation was made of the effect of a geometry modification of the ASTM shear specimen. The shear stress distributions on the planes of failure for all specimen types were found by means of electric strain gages. The experimental stress analysis results established that the assumptions made in the standard shear test are not valid. The assumptions made for the notched beams were substantiated. The present ASTM shear test should be replaced by the notched beam test as the standard.

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