(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

At a particular stage of the manufacturing process, a robotic arm has the position and loading shown in the figure;

Calculate the direct stresses due to bending and the shear stresses due to torsion.

2. Relevant equations

M = r x F

3. The attempt at a solution

First, I took the applied force and resolved the moments about point A as follows (assuming the applied force is travelling parallel to the z-axis);

M = r x F = i(1-0) -j(2-0) = i - 2j

I am fairly sure that the next step in the problem is resolving these moments about the x and y axes into a moment along the figure (a torsional moment) and a moment parallel to the BC section; please refer to the following diagram;

However I'm not exactly sure how to do this. A tutor told me it's ok to treat the moments as if they were forces but i can't get my head around the idea.

Any advice or help would be appreciated.

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# Resolving Moments in 3D

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