Hello Rahul,
First of all I would like to thank you for the help.
About the contact I am sending you a simplified analysis in which I have two identical loads in two different load steps. What I expect in the results is that:
In the beginning of the first load step the contact is open, then in the end of this loadstep the contact is close due to the application of the first force F1.
In the beginning of the second step the contact should be closed (as in the last step of the first loadcase) and then the second load F2 would keep the contact closed during the second load-step.
The motivation is to understand how OS leads with multiple load-cases when using NLSTAT.
The problem that I am facing is that, in the beginning of the second step the contact is open, and I cannot understand why this is happening once that in the last step of the first loadstep it was closed. In addition, the results indicate that the displacement in both cases was 0.5 mm, which means the gap was closed two times. However the stresses in the second loadstep are double than in the first 8O . I cannot understand why this is happening, once that OS uses Newton-Method for NLSTAT, then I would expect that the second loadstep should use the geometric stiffness matrix from the last iteration of the first load-step in which the gap is closed and to run the second loadstep.
Thank you again for your help
Regards
Vitor
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