MecMovies 4.0 : M15.3: Principal Stresses in a Rectangular Tube Beam

scene 9 of 14

For the structural tube shape, the total area required for the $Q$ calculation will be divided into two portions.

τ_{x y} = \frac{V Q}{I t}

For the orange regions, the first moment of area $Q$ is:

= 42, 000 m m^{3}

For the purple region, the first moment of area $Q$ is:

= 43, 875 m m^{3}