June 19, 2019 at 8:51 pmJohnsonSubscriber
in the models down below a Fixed Support is put on the one side and a moment is applied on the other side.
The solutions of deflection and stress are very similar. But unfortunately I get strange results regarding the moment reaction in my symmetry model.
Full model makes sense (I applied 100000Nmm around X)
For my symmetry model I get a very large values around Z (I applied 50000Nmm):
I really do not understand that...
June 20, 2019 at 2:14 pmclaudiocozzaSubscriber
i've a similar problem with a bending moment on a stepped shaft.. when i run the full model it's ok, when i run 1/4 there are a lot of mistakes.. i really don't know
in my case, i apply a moment of 10000 and i've a reaction of 3000
June 20, 2019 at 2:20 pmJohnsonSubscriber
I let you know, if I find something out!
June 20, 2019 at 7:18 pmpeteroznewmanSubscriber
I assume you have a correct symmetry condition on the cut face of the half pipe.
Try this, delete the moment and apply the moment using Components and set the Behavior to Rigid.
June 21, 2019 at 12:59 pmjj77Subscriber
This is an interesting one - we do get that because of some of the reactions that need to be there on the symmetry plane ( I have checked with Strand7 and the same results are achieved, thus there will be torque moment due to these reactions).
Now the displacements and bending stresses for the 1/2 sym. are the same as the full model as expected so it is fine, but if not feeling 100% sure, just use a full model, simple
of course always check and validate results
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