Reply To: Convergence difficulty when shell edges come into contact with solid body

[Emperor]

I learned that the semiimplicit method could solve this kind of non convergence, you just have to avoid solid285 elements (according to my calculations) in the analysis. To do this you just have to add an APDL command in the static structral branch and write semiiplicit, this will activate a semiimplicit scheme that is not activated by default. It switches to the semiimplicit method when the implicit solution fails to converge.

You can learn more about this method by looking at the help : https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v212/en/ans_cmd/Hlp_C_SEMI.html?q=semiimplicit
Also, you can look at this page where these gentlemen have explained it very well.

Plot also the Newton-Raphson residuals, put at least 3 elements (see below), this will help to see the elements that caused the convergence to stop



Hoping that it helps you