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Ansys workbench force and moment reactions

Ansys workbench force and moment reactions

Ansys workbench force and moment reactions

(OP)
Hi all,
I'm using Workbench 14.0 to work on a variable-section bar which is fixed at both ends.
The only external load I applied is standard earth acceleration (on the Y-axis). I want to get the load reaction at both ends.

Using the workbench probe I could get the force reactions (FX1, FY1, FZ1, FX2, FY2, FZ2) and moment reactions (Mx1, My1, Mz1, Mx2, My2, Mz2). However when I checked the results, I found out that the total force reactions at the global coordinate system were:
FX1 + FX2 = 0
FY1 + FY2 = total weight of the bar (which is make sense)
FZ1 + FZ2 = 0

However,
Mx1 + Mx2 not equal to 0
My1 + My2 not equal to 0
Mz1 + Mz2 not equal to 0

If I remember correctly, for a equilibrium system, the total moment must be equal to 0 ?
Is there anything wrong here?
Please help.
Thanks.

RE: Ansys workbench force and moment reactions

Hi,

Is your bar perfectly symmetric ?

And what are the values ? if Mx = 10 N.m and My = 1E-3 N.m, then My is (almost) 0.

RE: Ansys workbench force and moment reactions

(OP)
Dear Orel,

Thank you very much for your response.
Yes, the bar is not symmetrical and actually the moment reactions are big numbers and big differences (to me) that cannot be canceled out.
I checked with a simple straight bar, there is no issue at all.
Please help.
Thanks.

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