Page History

...

The following figure shows the equivalent or von Mises stress at the end of the second load step. The max value occurs in the bolt. A mesh refinement study is necessary. It turns out these stress values change appreciably on refining/improving the mesh. 
 

Contact Gap 

Make sure Contact Miscellaneous is turned on before obtaining the solution. This gives you access to additional items in contact post-processing. Then follow the video.

Image Added

<iframe width="560" height="315" src="https://www.youtube.com/embed/gPmBaxGsiiQ?rel=0" frameborder="0" allowfullscreen></iframe>

...