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ABAQUS - Input file - Definition of nonlinear spring (SPRINGA)

Submitted by Ste.Cra on

Hello all,

I am currently working at a structural dynamic problem with Abaqus/Explicit. The work involves an impact and in this context the goal is to connect two rigid bodies (with their constraint, mass and velocity field) to each other with a NONLINEAR SPRING; the element used is the so called SPRINGA element.

Using File-->Import-->Model I have imported the input file, which I have previously modified in the following way:

 

*Spring, elset=SPRING-spring, nonlinear

 

0,0

1000,0.002481

2000,0.004963

3000,0.007444

4000,0.009926

5000,0.012407

6000,0.014888

7000,0.015062

8000,0.015261

9000,0.015484

*Element, type=SpringA, elset=SPRING-spring

 

But when I import it in Abaqus, I have the following error:

 

WARNING: The following keywords/parameters are not yet supported by the input file reader:

---------------------------------------------------------------------------------

*PREPRINT

*SPRING, NONLINEAR

The model "AAA_MODIFY" has been imported from an input file. 

Please scroll up to check for error and warning messages.

 

What did I do wrong? Is the input file correct?

 

Thank you so much for the help!