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Element group data Error

Creator
Creator

First of all, what is an element group data? The quick reference guide says: " In static analysis, an element group is defined as all case control selected elements for a given load case for SORT1 output. For SORT2 output, an element group is defined as the data for a given element type for all load cases." 

But I don't understand what that means exactly. 

In the F06 file I get this. Where do I find these mismatched flags? 

 

***********************************************************
E R R O R I N E L E M E N T G R O U P D A T A
***********************************************************
ERROR OCCURS IN ELEMENT GROUP = 1
***********************************************************
DESCRIPTION OF ERROR:

ERROR TYPE 1: MISMATCH IN FLAGS FOR TEMPERATURE
LOADING
ERROR TYPE 2: MISMATCH IN FLAGS FOR TEMPERATURE
GRADIENT LOADING

***********************************************************
THE ERROR ENCOUNTERED IS OF TYPE = 1
***********************************************************
S T O P
***********************************************************
*** ERROR NO. A1396 ***

4 REPLIES

Re: Element group data Error

Siemens Phenom Siemens Phenom
Siemens Phenom

Can you provide more information:

  • What solution sequence is this?
  • Attach the .f04/.f06 and .log files

 

This does not look like a NX Nastran error. Nastran errors are usually labeled as USER [FATAL/WARNING/INFORMATION] MESSAGE and are preceeded by ^^^ or ***

 

 

Re: Element group data Error

Creator
Creator

Yeah, I can' t find it in the nastran error list. I have no clue what it means except that it has to do with the elements. The solution sequence is 601, the material card is MATSMA, the material I am trying to model is Nitinol.

I have attached the requested files. 

Re: Element group data Error

Siemens Phenom Siemens Phenom
Siemens Phenom

The model summary shows 121 grid points and 100 cquad4 elements. This sounds like a simple flat plate. If the model is not proprietary, can you post the input deck as well?

Re: Element group data Error

Creator
Creator

It is a simple plate. I am trying to validate Nitinol stress-strain data I have from literature with a simple cantilever beam under tension and compresion. I have attached the required file (the beam). I want to be able to gradually load the beam then gradually unload it. That way I will have the stress and strain data from FEA which I can then compare with the literature, then I can move on to the actual model which is more complex.