1-9. A wooden
board is subject to a load 
.
The grains of the wood have an angle of 
as
shown in the figure. Determine the distributions of the normal and shear stress
that act perpendicular and parallel to the grains. (Ans. 
)
1-9. A wooden
board is subject to a load .
The grains of the wood have an angle of as
shown in the figure. Determine the distributions of the normal and shear stress
that act perpendicular and parallel to the grains. (Ans. )