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Hi @John_Holtz
Is there a sample FEM model that elaborates the procedure to perform Creep analysis in Nastran? It would be great if you could attach it in the comments for reference.
Thanks in advance.
Hi all,
I am not a creep/viscoelastic expert, but there appears to be two different methods available in the Nastran solver:
In my experience, the biggest problem is finding the material properties. Without that information, you are not going to be able to analyze anything useful.
Hi @John_Holtz
I did find the 2021 version of the Users Manual. However, the manual does not clearly mention what the input values represent (Page 322). I have attached a screenshot of the input file script. It would be great if you could help me figure this out.
Thanks in advance.
The documentation for the Nastran commands (also known as cards, as in computer punch cards 😄) is online. For example, see the description of the CREEP command.
Do you have the material properties that you need to define the creep law? Or are you hoping to get the material properties once you understand the creep laws that are available?
Hi @John_Holtz ,
Thank you for the link to the description of the CREEP command. The creep properties for the plastic I am simulating (PEEK-CF30) are not readily available so that is still going to take some effort!!
Hi @Anonymous
Did youhad succes defining the CREEP parameters ?
If yes, I'd be interested to discuss more in detail with you.
Benoit
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