problem with boundary condition

- April 27, 2022 at 3:28 pm
  
  las1234
  Subscriber
  
  Hii ,
  I want to simulate a ring and a membrane with internal pressure. I used symmetry to divide the model in 4 but now I don't know how I should fix the body .
  Thank you see photo plsss
- April 27, 2022 at 9:05 pm
  
  peteroznewman
  Subscriber
  
  In Mechanical, insert a Symmetry folder into your model. Under the Symmetry folder, add a Symmetry region for the X direction and select all the edges of the model cut by the YZ plane. Add a Symmetry region for the Z direction and select all the edges cut by the XY plane. The model has one last DOF that is unconstrained, rigid body motion along the Y direction. Select the vertex on the center rib and apply a Displacement of Y=0.
- April 28, 2022 at 9:19 am
  
  las1234
  Subscriber
  
  thank you very much .
  I have another question. I want to put pressure, should I divide it in 4? or the same like for the whole system ?
  thank,you
- April 28, 2022 at 9:25 am
  
  las1234
  Subscriber
  
  anither question what i found in stress should i multiple it in 2 ? because when i use boiler formula i have a normal stress of 33 but know i found just the half
  thank you man :)
- April 28, 2022 at 9:54 am
  
  peteroznewman
  Subscriber
  
  Don't divide the pressure, it acts on a surface area and you cut the surface area by slicing it away.
  The stress is local to the element so you don't divide that either.
  I don't know what boiler formula you are talking about.
- April 28, 2022 at 10:07 am
  
  las1234
  Subscriber
  
  See the Link Plesse . I mean this
  Because I don't have othere Referenzen to See If my Stress ist OK i usw this Formular
  Thanks you Very much
- April 30, 2022 at 11:17 am
  
  las1234
  Subscriber
  
  .
- April 30, 2022 at 11:17 am
  
  las1234
  Subscriber
  
  can i maybe attach the file that you can have a look ?
  Thank you
- May 2, 2022 at 12:02 am
  
  peteroznewman
  Subscriber
  
  Sure, attach your .wbpz file and say what version of ANSYS you are using.
- May 2, 2022 at 12:57 pm
  
  las1234
  Subscriber
  
  Heey , Thank you very much .
  it's Ansys workbench 2022. can you please check my Mesh and the connection ? because i got always a good deformation but with very big stress . the stress in the Ring should be 20 MPa with the formel of Barlow ...
  Thanks
- May 2, 2022 at 8:26 pm
  
  peteroznewman
  Subscriber
  
  Take a look at this archive. I used SpaceClaim to convert the solids into midsurfaces. I used the Share button on the Workbench tab to connect the geometry and delete all the contacts.