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what would cause "include snap-through" checkbox to be greyed out? in a static contact analysis?

AC_10616694
4-Participant

what would cause "include snap-through" checkbox to be greyed out? in a static contact analysis?

Hi all hopefully a simple question, but i cant seem to find the answer.

i have a simple contact static analysis setup to analyse the contact forces and stress in my designed snap fits on a plastic part retaining a pcb.

it is my understanding that i should use the include snap through option in this analysis because running it without it and 10 equally spaced time steps throws a warning about excessive sliding at timestep 7, and causes it to run indefinitely seemingly

*** Warning: Excessive displacement detected at contact regions.
   Recovery will be attempted by reducing time step size.
   Better convergence of the nonlinear solution may be achieved if
   you redefine your analysis with smaller time steps .

** Warning:

           Complete sliding was detected at one or more contacts
           in your model. This can cause excessive motion and/or
           poor convergence. Please review your loads and constraints.
*** sliding first Occurred
*** Interface5:locally sliding
*** Interface5:fully sliding

AC_10616694_0-1723720117215.png

 

 

Any idea why it is greyed out or do i not need it? it is my understanding that it allows better convergence for the above warnings.

using creo 9

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info as pdf (german)

maybe Google translator will help here 🤔

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