UMAT

[msomiv]

Hi Guys,
Is there anyone who can assist me in checking my UMAT code written in fortran language. I have spent more than three months now trying to figure out what could be the problem. I have to simulate a model that I developed using solidworks.

Thanks.

 

[IceBreakerSours]

Some general guidelines:

1. Write a small program that calls the UMAT and see if it works *outside* ABAQUS.

2. Have you tried using write(6,*) or write(7,*) commands?

3. If you have Visual Studio, you may debug your code inside VS. However, options 1 and 2 are more efficient options, in my opinion.

4. Before running the material model with your ultimate geometry, you should try running it sequentially:

4.1. 1 unit cell under uniaxial tension/compression .. shear .. etc.
4.2. Multiple cells under similar loading conditions
4.3. Final model with the material model in comparison with an inbuilt material (or a combination of inbuilt materials/elements).

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http://www.eng-tips.com/faqs.cfm?fid=376

http://www.eng-tips.com/faqs.cfm?fid=1083