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I am starting to learn how to use ANSYS APDL. So I don't have much knowledge in the software.

I have modelled a cantilever beam (with beam188 elements) and the only load that i have applied was the self weight.

When I ask for the shear force diagram (element table) and plot the results, the SFD looks like this:

enter image description here

Shouldn't it be linear? What happened?

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  • $\begingroup$ Out of curiosity, what are the units of stress as displayed? The min is -19600, but what units? $\endgroup$
    – wwarriner
    Mar 31 '16 at 0:57
  • $\begingroup$ -19600 is the shear force in Newtons! $\endgroup$ Apr 1 '16 at 2:36
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    $\begingroup$ Yes, it should be linear. It's hard to troubleshoot an FE model with a single image though. I'd suggest that you check all boundary conditions, maybe you've accidentally restrained some nodes? if you find nothing, maybe try to rebuild the model in a new file from scratch and see what you get. $\endgroup$ Apr 1 '16 at 14:46
  • $\begingroup$ I second @WilliamS.Godfrey-S.E. , some DOFs seem missing. Try to plot the deformed structure, and also post the APDL script here, it should only be few lines of code $\endgroup$
    – hdrz
    Jul 30 '17 at 10:57
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Dear madam , pls make beam with keypoints and then do meshing with mesh tool and use smisc3 and 16 for bending moment and smisc 6 & 19 for shear force

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