Ansys Learning Forum Forums Discuss Simulation General Mechanical Simulation not able to converge Reply To: Simulation not able to converge

lvelasquez
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Hello Harshvardhan,

After a some research and changed the formulation of the contacts (making sure all were closed)  to pure penalty, activated line search and activating weak springs, the solution was able to converge. Now I got a max stress of 30 GPa (yes, 30,000 MPa). I tried using translational joints but the behaviour was weird. 

Now my new questions arrises:

  1. Can weak springs cause elevated stress?
  2. Can I use translational joint or bolt pretension with this concept of geometry? The bolt is inserted to the plastic using an insert, which I removed to reduce the number of elements. But it has no nut at the lower end, so I´m thinking this is why I got the "self penetration" of the bolt body. Aslo I need to know the shear stress in the bolt so I can´t go with bolt pretension, but with translational joint I get the "constraint conditions are not satisfied for 3 joint elements with lag mult option".