struggling to converge at the last load step

mpvnaresh
mpvnaresh Altair Community Member
edited October 2020 in Community Q&A

Hi 

 

I am running a nonlinear quastatic analyssis 

Run no 1 : only with RFORCE (converged very smoothly)

Run no 2:along with RFORCE temp load is also added (TREF and A desined on MAT1 , very smooth convergence )

Run no 3: only TEMP Load(converfed very smoth 98.5 % from then lot of iterations and lot of cutbacks ) 

 

Now the question is the FEA model is same for all the models only thing varied is RFORE deactivated ..why it is struggling to converge at the very last load step ..?

 

please find the the attached for reference 

 

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited July 2019

    I see that you have PARAM EXPERTNL,CNTSTB, can you try running it without this param.

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