ofModulus of At Various

Modulus of rigidity (GLT) of veneer laminates was shown to be unrelated to dynamic modulus of elasticity (Eo) of single veneers and also, within the range of samples tested. unrelated to specific gravity. Values determined by the flexure test (GLR) were consistent with those from standard plate shear tests (G£T)' THE OBJECTIVE of the study reported here was to determine whether modulus of rigidity of rotary-cut southern pine veneer is related to modu. Ius of elasticity. Values of modulus of elasticity parallel to the grain (E) are available for most species, but data on modulus of rigidity (G) are somewhat limited. In the absence of more precise knowledge, the value of G is frequently assumed to be 1./16 of E in tension and compression (USDA Fores~ Products Laboratory 1955, p. 78). Deflection at midspan of a rectangular beam with center loading is calro1eted as follows: PL' O.3PL (I] RAOIALTANGENTIAL