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Given a simple cantilever beam with an axial and transverse load, I look at both the axial force and the bending moments on a surface through the middle of the beam. The issue is, when I calculate the expected maximum normal stress from the forces and moments, it is way off from the stress ANSYS calculates for that same surface. How can I expect to calculate the stress from the force and moments? I use this to calculate the expected stress, based on the force and moment values from ANSYS.

173.26*(0.5/2)/((1/12)1(0.5)^3) + 26.262/(.5) = 4210.8 psi

The beam cross-section is 1" by 0.5".

There must be a way to get closer to the ANSYS values?

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    $\begingroup$ You have a crazy mesh. 2 elements across the thickness may not be enough. I would suggest Face meshing and regular mesh with more elements across the thickness; try to gradually increase this number and see its effect on the results. Local refinement at the section where you want to get the reactions may be useless when the rest of the mesh is so rough. $\endgroup$ Commented Nov 6 at 12:49

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