Rolling Shear Modulus of Sweetgum Plywood and Unidirectionally Laminated Veneer
Keywords:Sweetgum, plywood, veneer, rolling shear, modulus, strength, true rolling shear, parallel shear
AbstractExperimentally obtained values of apparent rolling shear modulus and strength of sweetgum 4-ply, 12.7-mm-thick plywood, when the shear forces are applied parallel to the face grain of the plywood, are presented. Also presented are experimental values of true rolling shear modulus (GTR) of unidi-rectionally laminated sweetgum veneer tested in the dry condition. Finally, the experimentally obtained value of the apparent rolling shear modulus of the tested sweetgum plywood was closely predicted using the obtained GTR and GLR values.
American Society For Testing and Materials (ASTM). 1996. Standard method of testing plywood in rolling shear. ASTM D 2718-90, Philadelphia, PA.nBendtsen, B. A. 1976. Rolling shear characteristics of nine structural softwoods. Forest Prod. J. 26(11):51-56.nBiblis E. J., W. L. Chen, and W. C. Lee. 1972. Rolling shear properties of southern pine plywood and unidirectionally laminated veneer. Forest Prod. J. 32(2):45-50.nBiblis E. J., and W. C. Lee. 1984. Properties of sheathing-grade plywood made from sweetgum and southern pine. Wood Fiber Sci. 16(1):86-92.nChow, S. 1974. Lathe-check influence on plywood shear strength. Inf. Rep. VP-X-122. Can. Forest Serv., West. Forest Prod. Lab., Vancouver, BC.nFoschi, R. O. 1970. Rolling-shear failure of plywood in structural components. Inf. Rep. VP-X-67. Can. Forest. Serv., West. Forest Prod. Lab., Vancouver, BC.nHunt, M. O., and D. A. Matteson. 1976. Structural characteristics of weathered plywood. J. Structural Div., Am. Soc. Civil Eng., 102(ST4):759-768.nLee, W. C., and E. J. Biblis. 1979. Predicting rolling shear modulus of plywood. Forest Prod. J. 29(4):31-34.nMunthe, B. P., and R. L. Eihington. 1968. Method for evaluating shear properties of wood. USDA Forest Serv., Res. Note FPL-0195. Forest Prod. Lab. Madison, WI.nPalka, L. C. 1967. Influence of loading methods on rolling shear. Forest Prod. J. 17(3):30-36.nPalka, L. C. 1978. Rolling-shear properties of single-species canadian softwood plywoods. Inf. Rep. VP-X-177. Can. Forest Serv., West. Forest Prod. Lab., Vancouver, BC.nPalka, L. C., and J. Hejjas. 1977. Effect of moisture content on the mechanical properties of Douglas-fir plywood in rolling shear. Forest Prod. J. 27(4):49-53.nSamek, J. 1970. Effect of moisture content on shear in the plane of the plies (rolling shear) strength of sheathing grade Douglas-fir plywood. Council For. Industries BC, Rep. 93. North Vancouver, BC.nSmith, G. R. 1974. The derivation of allowable unit stresses for unsanded grades of Douglas-fir plywood from in-grade strength test data. Council For. Industries BC, Rep. 193. North Vancouver, BC.n
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