Shear Tests of Wood Using V-Notch Beam and Square Plate Specimens
Keywords:Douglas-fir, size factor, rolling shear, shear strength, shear parallel-to-grain, shear perpendicular to grain
AbstractInvestigation of the V-notch beam specimen for shear testing as developed in Rumania showed that it is not generally applicable to the determination of shear strength of wood. The square plate twisting test performed better, and optimum results were obtained when the ratio of side length to plate thickness was on the order of 12 to 14. The plate twisting test was subject to a very substantial size factor that limits the usefulness of the test without standardization of specimen size.
American Society for Testing and Materials. 1972. Book of standards, Part 16. ASTM, Philadelphia, Penn.nForest Products Laboratory. 1955. Wood handbook. U.S. Dep. Agric., Washington, D.C.nGoodman, J. R., and J. Bodig. 1971. Orthotropic strength of wood in compression. Wood Sci. 4(2):83-94.nIosipescu, N. 1966. Verfahren für die Prüfung des Stahls im reinen Schubversuch. Material-prüfung 8(3):92-97.nIosipescu, N. 1967. New accurate procedure for single shear testing of materials. J. Mater. 2(3):537-566.nKeylwerth, R. 1945. Unpublished data, as cited by Kollmann and Côté (1968).nKollmann, F. F. P., and W. A. Côté, Jr. 1968. Principles of wood science and technology, I. Solid wood. Springerverlag, Berlin.nMcMillin, C. W. 1958. The relation of mechanical properties of wood and nosebar pressure in the production of veneer. For. Prod. J. 8(1):23-32.nMunthe, B. P., and R. L. Ethington. 1968. Method for evaluating shear properties of wood. U.S. Forest Service Research Note FPL-0195, Madison, Wisconsin.nRadgliffe, B. M., and S. K. Suddarth. 1955. The notched beam shear test for wood. For. Prod. J. 5(2): 131-135.nRamberg, W., and J. A. Miller. 1953. Twisted square plate method and other methods for determining the shear stress-strain relation of flat sheet. J. Res. Natl. Bur. Stand. 50(2): 111-123.nSchneeweiss, G. 1964. Druckfestigkeit und Stempelhärte. Holz Roh- Werkst. 22(7): 258-264.nSchniewind, A. P., and D. E. Lyon. 1973. A fracture mechanics approach to the tensile strength perpendicular to grain of dimension lumber. Wood Sci. Technol. (in press).nSumiya, K., and H. Sugihara. 1957. Size effects in the tensile and bending strength of wood. J. Jap. Wood Res. Soc. 3(5):168-173.nVoiculescu, St. 1970. Asupra incercarii lemnului la forfecare pura in lungul fibrelor prin noul procedeu propus pentru standardizare. Bull. Polytech. Inst. Brasov, Ser. B.—Forest Economy 12:277-286.n
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