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spring

Submitted by nilu on

Please help me,

If anyone knows please tell me how to define a compression only nonlinear spring in Abaqus,

I can defined a nonlinear connector, but it should works only in compression. When it relaods or in tension I want it to have zero stiffeness.pl help me with this issue

nilu

 Dear Frank, Thank you very much for your concern,

Mentioned below are the keywords related with connector mentioned in input file, But kindly can you tell where should I include this key word, Because when I input this command Abaqus gives an error mentioning " *NOCOMPRESSION, The keyword is misplaced. It can be suboption for the following keyword(s)/level(s): elastic "

 

*Connector Section, elset=Wire-1-Set-1, behavior=ConnSect-1

Axial,

*Connector Behavior, name=ConnSect-1

*Connector Elasticity, nonlinear, component=1

 

Also I think in my case I only need when reloading stifeness of
connector to be zero without going through the same path it went, when
loading.

Any comment from you is highly appreciate,

 

Thank you very much,

Niluka

Wed, 04/25/2012 - 19:33 Permalink
Frank Richter

 

Hello Niluka,

 actually my reply should have stated *NO TENSION instead. Where to put keywords is documented in the keywords manual. This command has to inserted after *ELASTIC and its data line. And it can be combined exclusively with linear elasticity.

 Good luck

Frank 

------------------------------------------ Ruhr-University Bochum Germany

Thu, 04/26/2012 - 08:39 Permalink
nilu

Thanks a lot Frank for your concern,

 I found uniaxial connector definition,  there i can give compression data as loading data, and no tension then it works. But when I gives unloading data property it still doesn't work. Now only remaining problem is regarding unloading. Anyway thanks a lot for your concern,

I am going to post another comment regarding how to determine mass participation ratio on frequency analysis. If you know please comment there aswell.

Thanks a lot.

Niluka

Sun, 04/29/2012 - 18:45 Permalink