Contact not working

Karthic_22061

Hi,

I am trying a simple case to understand the contact behavior in Optistruct. I tried using search distance for contact pair but it didn't work out

 

Can you please suggest me why the contact is not working in my model attached.

 

 

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Altair Forum User

Hi Karthik,

 

Run NLSTAT analysis instead of Linear static and check the results. 

Karthic_22061

Great.. Its working fine. can i know y doesn't it work for static

Altair Forum User

Karthik,

 

Contacts are non-linear and you have friction on top of it. So linear wil ignore contact at this point. 

Karthic_22061

Hi Prakash,

I tried the same model with transient load case..

Analysis type- Non linear transient

Sub case option Analysis type - DTRAN

 

I am getting error 

A fatal error has been detected during input processing:

  *** ERROR 14: Missing    NLOUT #   99 referenced by SUBCASE # 1.

 

How to resolve it. Please do help with this

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Karthic_22061

HI,

I overcame the above by creating a NLOUT card. 

 

I am getting

*** ERROR # 4942 ***
  NLOUT card needs to be issued for transient subcase 1 for output.

 

Help me in resolving it

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Nachiket Kadu_22143

Hi Kartic

In load step option go to subcase options, under that you will find subcase_unsupoorted activate it and in comments type NLOUT,10,NINT,10,SVNONCNV,YES

That will work.

Thanks

Karthic_22061

Thank you Nachiket

Karthic_22061

Hi,

Will contact work for the Geometric nonlinear case in Optistruct?

Altair Forum User

Hi karthic,

 

Yes contacts should work with non-linear unless there are any modelling issues. 

Karthic_22061

Hi Prakash,

I tried the case of NLGEOM with a contact. Its not taking contact, where as the same contact model works fine for Nonlinear static case...

Pls take a look @ model..

 

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