In terms of the coordinate system shown, the moments and product of inertia of the cross section are I y = I z = 19.6 in 4 and I yz = 11.1 in 4 . A beam with this cross section is subjected to a...

In terms of the coordinate system shown, the moments and product of inertia of the cross section are
I_y

=
I_z

= 19.6 in⁴
and
I_yz

= 11.1 in⁴. A beam with this cross section is subjected to a bending moment
M
= 80, 000 in‐lb about the principal axis with the larger moment of inertia. What is the maximum magnitude of the resulting distribution of normal stress?