The bending load shear stress was found to be 12.5kip
what is shear stress ?
Shear stress, often denoted by (Greek: tau), is the component of stress that is coplanar with a material cross section. It is caused by shear force, a component of the force vector parallel to the material cross section. Normal stress, on the other hand, is caused by the force vector component that is perpendicular to the material cross section on which it acts. Shear stress is a force that tends to distort a material by causing slippage along a plane or planes parallel to the imposed stress. The resulting shear is extremely important in nature, since it is directly tied to the downslope flow of earth elements and earthquakes.
Primary shear: τ′=0
Secondary shear:
Ju=2πr3 =2π(1.5)3 =21.21 in3
J=0.707hJu=0.707(1/4)(21.21)=3.749 in4
2 welds:
τ′′=Mr/2J=8F(1.5)/2(3.749)=1.600F
τ′′=τallow ⇒1.600F=20⇒F=12.5 kip
Therefore the bending load shear stress was found to be 12.5kip
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