The third group was composed of the tests madeto determinethe shearing stress and shearing energy.
The shearing stress T in MPa was then calculated by the following equation(Mohsenin,1980):
On the contrary to two layer systems subjected to vertical surface force in which the distributions of the maximum shearing stress vary very much with the Young's modulus ratio [E.sub.1]/[E.sub.2], the maximum shearing stresses [[tau].sub.max] for the cases of surface shear force tend to concentrate in the upper layer irrespective of the magnitude of [E.sub.1]/[E.sub.2].
The extent of vertical propagation of shearing stresses in elastic two-layer systems subjected to surface shear force becomes smaller for higher magnitudes of the ratio of radius of loaded area to the thickness of the upper layer, but the extent of horizontal spreading does not change very much with the ratio.
The transverse component of the
shearing stress at the plate for secondary velocity is
A wood laminate structural member supported between supports located at its opposite ends to span an open area for bearing an applied load corresponding to
shearing stresses that act within a horizontal shear plane substantially perpendicular to the applied load, comprising: plural elongate wood segments, each having a major surface for bearing the applied load between the supports and secured together in a stack with their lengths generally aligned with the longitudinal axis of the wood structural member wherein the plural wood segments located centrally of the wood structural member have two or more annual growth rings per inch that intersect the major surface at an angle of between thirty and ninety degrees to provide increased resistance to horizontal shear stresses.