## General Mechanical

Topics relate to Mechanical Enterprise, Motion, Additive Print and more

#### mean contact pressure static structural

• bokaJ
Subscriber

Hallo erveryone,

I want to find out the mean contact pressure of two bodies. Below you can see the contact pressure with the display option "averaged".

• 1shan
Ansys Employee
,nHave you created multiple contacts with the same contact face? In the picture I see that 2 ribs are flushing with the red contact region but only one sleeve is selected as target face. If you have created multiple contact with the same contact face you may combine them in a single contact and see if the issue persists. Since the contact is asymmetric the values are computed at the contact face, so the force which you are seeing might be an addition from multiple contact pairs. You may also switch the behavior to symmetric and see if it makes any difference.nRegards,nIshan. n
• bokaJ
Subscriber
Hallo Ishan, nThank you for your quick answer. nI am not sure what do you mean with multiple contact. nI am just interested in the mean pressure on the first rib. So I made two contacts. The first contact was between the red area and the inner rib and the second one was between the outer rib and the red area. And then I plotted just the rraction force of the contact of the inner rib.Am I getting you wrigt that in your opinion it could be possible that I see the addition of the contact force of the inner and the outer rib, because they have the same contact body(the red one)? nI am not sure how I can switch the behavior to symmetric. Or did you mean that I should use a symmetric boundary condition instead of the frictionless support? nThank you very much for your time. nBest regardsnbokaJn
• 1shan
Ansys Employee
,nThat's correct, it might be an addition of the contact force of inner and outer rib(though I am not 100% sure). Create a single contact in which the inner and outer ribs are defined as target faces rather than 2 different contact. For symmetric contact, go to contact behavior>symmetric. You could read about this in the help documentation -nDefinition Settings (ansys.com)nRegards,nIshan.nhttps://forum.ansys.com/discussion/3978/how-to-access-the-ansys-online-helpn
• bokaJ
Subscriber
Thank you Ishan,nnit has worked. I splitted the red area into two areas. You can see my new contacts bellow:nnNow I get a mean pressure on the inner rib of about 10 N/mm^2 and if I look at the contact pressure this looks quiet logical.nnThank you very much!!nBest regardsnbokaJn
• bokaJ
Subscriber
If I sum up the reaction force of the two splitted areas, then I get the reaction force which I get before. So your guess was correct!n