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Question for curve fitting of Mooney Rivlin in NX CAE

Hello,

 

I am beginner of Rubber analysis,

I have a question for curve fitting of Mooney Rivlin  in NX CAE,

How to perform curve fitting of Mooney Rivlin model in NX CAE, if i only have test data ?

such as the data in the document "Basic nonlinear analysis user guide",

 

2017-03-12_114454.png229.png 

 

 

4 REPLIES

Re: Question for curve fitting of Mooney Rivlin in NX CAE

Siemens Valued Contributor Siemens Valued Contributor
Siemens Valued Contributor

Re: Question for curve fitting of Mooney Rivlin in NX CAE

Siemens Phenom Siemens Phenom
Siemens Phenom

One of my collegues created an NX Open program in NX 8.5 to generate material properties coefficients from test data via curve fitting. That program no longer works in newer versions due to changes in XY graphing tools. However, the same individual created a python script to do most of what the NX Open program does. I've not tried it and am really ghost writing here. But here are instructions that I have on how to use the python script.

 

  1. Download and install winpython (most recent version)
  2. Need to open up the winpython command window (winpython DOS prompt)
  3. The unpacking of the 7z file will create a folder called “cfit”
  4. Go to the folder that contains “cfit” folder
  5. Type, python cfit (no need to go into any specific subdirectory)

I previously sent this to a user in November of last year. He downloaded WinPython version 3.5.2.3Qt5 and it worked fine for him. Our services group was given the task of creating an NX Open program to replace the one from NX 8.5. I don't know if that's been done yet, but will post it here if it has been done.

 

Regards,

Mark

 

 

Mark Lamping

Simulation Product Management

Simulation and Test Solutions

 

Siemens Industry Sector

Siemens Product Lifecycle Management Software Inc.

 

mark.lamping@siemens.com

www.siemens.com/plm

Re: Question for curve fitting of Mooney Rivlin in NX CAE

Hello, AM,

 

Thank you very much for your feedback.

 

Best Regards,

Wang

Re: Question for curve fitting of Mooney Rivlin in NX CAE

Hello, MarkLamping,

Thank very much for your script and instruction !
I will try it.

Best Regards,
Wang