Leaf spring in Explicit Dynamic

- March 26, 2019 at 9:03 pm
  
  Veronica
  Subscriber
  
  I'm trying to solve a leafspring assembly problem. I'm using Explicit Dynamic but I get the following error:
- March 26, 2019 at 11:44 pm
  
  peteroznewman
  Subscriber
  
  What questions are you trying to answer with this model?
  
  Why did you choose Explicit Dynamics over Transient Structural?
  
  Perhaps you can get the answers you need in a Static Structural model.
- March 27, 2019 at 1:16 pm
  
  Veronica
  Subscriber
  
  Thanks for your answer. I am new to Ansys, I was trying to solve the problem in Static Structuctural but had penetration problems between spring leaves.
  
  I apply a displacement and I want to know what is the stress in the leaf spring.
- March 27, 2019 at 6:12 pm
  
  peteroznewman
  Subscriber
  
  Don't use Explicit Dynamics to solve Statics problems.
  
  Did you create frictional contact between each leaf?
  
  Did you use the Contact Tool to check initial contact status and find the contacts were closed?
  
  Did you turn on Large Deflection?
  
  Did you turn on Automatic Time Stepping?
  
  Did you set the Initial Substeps to 100?
- March 27, 2019 at 8:39 pm
  
  Veronica
  Subscriber
  
  I tried with No separation contacts type in Static Structurak
  
  I got this result:
- March 27, 2019 at 10:44 pm
  
  peteroznewman
  Subscriber
  
  Is the result good or not good? I can't be sure looking at the image, but it looks not good.
  
  If it is not good, then don't use No Separation contact, do use Frictional Contact.
  
  You should consider using symmetry, even though the geometry doesn't look perfectly symmetrical, and cut the model in half down the center. That will constrain the leafs to the center.
- April 28, 2019 at 3:24 pm
  
  Veronica
  Subscriber
  
  Sorry for answering late.
  
  Thanks for your help.
  
  I have used frictional contact but I still have the same problem.
- April 28, 2019 at 4:16 pm
  
  peteroznewman
  Subscriber
  
  Micaela,
  
  Did you turn on Large Deflection?
  
  Did you turn on Automatic Time Stepping and set the Initial Substeps to 100?
  
  Did you insert a Contact Tool under the Connections folder and generate the Initial Contact Status? All the contacts must be closed or near. None can be Far Open or they will be ignored. Please check that if you haven't already.
  
  If you want me or someone else to take a look at your model, create a Workbench Project Archive .wbpz file and use the Attach button which appears after you post your reply.
- October 23, 2019 at 9:29 pm
  
  Veronica
  Subscriber
  
  Thank you for your help, could you help me with anoter question. It is in this link /forum/forums/topic/apdl-mesh-1/
- October 24, 2019 at 12:24 am
  
  peteroznewman
  Subscriber
  
  I don't use APDL so I can't help with this one, sorry.