Upper bound bending in DIR 1
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Highest magnitude of bending stress due to moment M1 (Bending Ms/Ss in the plot name, title, and legend).
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Upper bound bending in DIR 2
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Highest magnitude of bending stress due to moment M2 (Bending Mt/St in the plot name, title, and legend).
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Upper bound axial and bending
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Highest stresses at the extreme fibers of the cross-section. Combined uniform axial stress and the two bending stresses due to M1 and M2: P/ A + [(M1* I22 + M2 * I12) * y1 + ( M2 * I11 + M1 * I21) * y2)] / (I22 * I11 - I12^2)
where I ij (I = j = 1 or 2) are the moments of inertia about the respective local orthogonal beam directions 1 and 2.
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