Non-convergent nonlinear iterations

Altair Forum User

Hello! 

 

I really need your help.

 

whenever I implemented OPTISTRUCT, I got ' Non-convergent nonlinear iterations for subcase 2' result.

 

I set hyper-elastic material, and pshellx for 2D design.

 

Also My load collectors are, SPC/LOAD/TABLED1/NLOAD/NLPARM, and I set load step NLGEOM

 

I don't know why I couldn'y get nonlinear analysis result in OPTISTRUCT.

 

My material is the example of MATX62.. I attached My entities and NLPARM screen-picture too

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

 

I also tried to change NINC and MAXITER values in NLPARM card..

 

And, use PARAM,EXPERTNL,YES and CONTPRM,STIFF,SOFT too

 

Please give me some advices

 

 

Thank you, 

 

Best Regards,

Altair Forum User

Hi @Jinil Kim

 

There could be many reasons for not converging with implicit analysis.

 

Could you please share all .out files?

Altair Forum User

Hi, Mr. Pagadala. @Prakash Pagadala

 

 

here is my .hm file!

 

thank you for quick reply:) 

 

thanks

 

(Sorry, now I am attaching..)

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