Comments

• kuhl

  April 17

  There is a section in the manual on contact stiffness. Not sure thats what you mean?

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• disla

  April 21 edited April 21

  A good starting point is E*50 but there is no general rule. My recomendation if there could be one is to keep contact clearance at least of 0.1% of the caracteristic element size in the normal direction to the contact area.
• Sebastianmaklary

  April 21

  I usually go with this procedure: Enter some value that seems reasonable and check the penetration depth after running it and then reevaluate if the stiffness should be increased. A lower stiffness is usually better for converging and I'm usually doing a static analysis where the purpose of the contact is just to transfer some normal force between two components. If I am analyzing something like a gear contact, where I would ideally want the contact to have no penetration, I will go with the highest stiffness that I can reliably get to converge but this also requires some testing to find a value to go with.
• disla

  April 21

  Hi, Sebastian,
  
  Have you take a look at Mortar contact?. I have obtain clearanes of 1E-35 with reasonable times. There is some limitations due to units conversion but results are really good when it works.
• Sebastianmaklary

  April 22

  Hi Disla
  
  No, I did not know about that, but I will definitely look into it as 1E-35 is approximately zero for all intents and purposes, so it would definitely help me better aproximate the contacts of gear faces. I'll try that out soon and see what can be concluded from it.