Deepika -- what you have tried already to find out what is going on? Have you
looked at the object that is filled by
DoFTools::make_periodicity_constraints() to see whether the constraints placed
in there are correct, for example? And are you applying the constraints? In
your code snippet, the 'constraint's object is filled by the called to
make_periodicity_constrains(), but then comes the closing } and the
constraints object is destroyed without you ever doing anything with it.
Best
W.
On 12/26/22 21:37, Deepika Kushwah wrote:
*** Caution: EXTERNAL Sender ***
Hello Everyone,
I am trying to apply PBC for an elasticity problem. I have already checked
tutorial step 45..I tried to implement that procedure (step-45) in my code,
but I am not getting any difference in results with and without PBC (I am
applying PBC on left(1) and right(2) in x direction see fig). I am attaching
here the fig in which the left(1), right(2), bottom(3), top(4) are the
boundary_indicators and also the piece of code.
I think there is some issue with the DoFTools::make_periodicity_constraints()
<https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.dealii.org%2Fcurrent%2Fdoxygen%2Fdeal.II%2FnamespaceDoFTools.html%23a929249499b1e5624728d212e90a8e037&data=05%7C01%7CWolfgang.Bangerth%40colostate.edu%7C9173f58905d940ef0a1508dae7c42dbc%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C638077128203671970%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=xGi8tbTwSTM9DXh0dmM%2Ba3W6ENzkIy64Jg91G%2FzF35o%3D&reserved=0> only, please help me to resolve this issue.
fig.png
image.png
image.png
The above results are the same in both cases. That means maybe PBC is not
applied here. But what to do so that I can see the result with PBC? Should I
change the displacement boundary conditions which are already applied?
Thanks & Regards,
Deepika
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