hi peteroznewman 

i made the changes you recommended, but the problem still persists


in the first step, pretend the bolt and then in the second step apply the deformation of the remote displacement

also apply the pretension of the bolt on the face an not on the body

i will attach the graphic results that the Newton Raphson gave me and the graphics force convergence


the model gives me the following errors:

"Contact status has experienced an abrupt change.  Check results carefully for possible contact separation."

"The unconverged solution (identified as Substep 999999) is output for analysis debug purposes. Results at this time should not be used for any other purpose."

"An internal solution magnitude limit was exceeded. Please check your Environment for inappropriate load values or insufficient supports.  Please see the Troubleshooting section of the Help System for more information."


I will attach the wbpz file of my model. Could you give it a look please?

thank you very much for helping me and sorry for my bad english