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Convergence issue with optistruct

Hi All

I am running small model of study of assembly steel tube (modeled with shell elements) into the Plastic part (modeled with Tetra elements).

Its Quasi static Non Linear problem, I have prescribed displacement to steel tube (via rigid) and defined contact between (Node to shell) Steel and plastic parts (Shell as master,Plastic part as Slave).

My model is taking lot of time to solve and analysis is not completing.

I have used below contact cards

$$ CONTACT Data
$$
CONTACT 2 5 2 5 NORM2.0 NO
+ N2S

Attached is model i am trying to run.

Any help is much appreciated

Regards

Kash

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Altair Forum User

Hi Kash,

Can you share the .out file?

Altair Forum User

Hi Prakash

attached is *.out file

Regards

Kash

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Altair Forum User

Hi Prakash

attached is original model for which i sent *.out file, you can consider any model you want.

Apologies The first model i sent earlier (my first mail i sent today), it has some modifications.

Regards

Kash

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Altair Forum User

Hi Kash,

Can you add EXPRTNL and CNTSTB cards to your model and check if this helps.

Altair Forum User

Hi Kash,

I am also facing a similar problem and the Non-linear solution is not converging after a lot of iterations.

Did you figure out a way to solve this?

Thank you.

Regards,

Bharat Pinapati

Altair Forum User

Hi Bharath,

Can you share the .out file?

Altair Forum User

Hi Bharath,

Can you share the .out file?

Hi Prakash,

I have attached the .out file.

The Iterations will keep on running and finally the solver will end with Convergence not achieved message.

Is Contact the issue here?

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