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Abaqus non linear spirngs modelling

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SJ8

SJ8

Structural
Mar 10, 2023
4
Hello to everyone,
I'm trying to model a nonlinear spring in ABAQUS.
I followed the ABAQUS guide and I created a simple input file defining one nonlinear spring. I also launched the analysis from the command window and an ODB is generated but when I open the ODB I get this error:

"There is no valid step data available on the database. If the analysis is running, the database must be closed and reopened once the results have been initialized. The requested operation has been cancelled."


Can someone help me?

Thank you in advance
 
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Check the files generated by Abaqus after job submission: log, sta, msg, dat. Look for error and warning messages.
 
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Thank you for your suggestion.
I fixed the problem but I have a new one.
The analysis runs perfectly when I define the nonlinear sprigs in this way:

*Spring, elset=Springs/Dashpots-1-spring,nonlinear
-10000, -2
-5000, -1
0, 0
5000, 1
10000, 2

Instead I get this error:

"***ERROR: INVALID INTEGER VALUE
LINE IMAGE: -10000., -0.2"

when I wrote

*Spring, elset=Springs/Dashpots-1-spring,nonlinear
-10000, -0.2
-5000, -0.1
0, 0.
5000, 0.1
10000, 0.2

How can I wrote decimal values? I tried the exponential form too but I get the same error


 
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Which type of spring elements are you using - SPRING1, SPRING2 or SPRINGA ? Can you share the input file ?
 
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Add an empty line after the *SPRING keyword and it will work:

Code: 
*Spring, elset=Springs/Dashpots-1-spring,nonlinear

-10000, -0.2
-5000, -0.1
0, 0.
5000, 0.1
10000, 0.2
 
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Thanks a lot man, it seems to work now
 
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