how to see the results from vusdfld

[V_S_B]

Hello everyone,
I wrote a subroutine to find grain size and microhardness after machining but I am unable to see anything in visualization. Kindly help me on this problem.
(code is attached)

 

[FEA way]

What exactly do you want to visualize ? Values of field variables can be written to output database as FV. And if you want to write solution-dependent state variables as well, request SDV.

 

[V_S_B]

I want to see microhardness and grain size changes after machining(hv and d in the code).
I have selected FV and SDV in field output but they are shown as zero.

 

[FEA way]

If you request it in *Element output and plot proper component then it should work. Unless there is an error in the subroutine. For reference check exemplary VUSDFLD code with corresponding input file in Abaqus documentation. There they request output of SDV.

 

[V_S_B]

How do I know if there is any error in my sub routine
??

 

[Manuel Costa]

You should always run (as I have experienced) abaqus subroutines through command prompt, with 'abaqus job=jobname.inp user=subroutine.f(or .for) interactive datacheck', if it gives you errors, it should be easily detected, if it shows THE ANALYSIS HAS COMPLETED, and your results are still zero when running with *Field Outputs (FV and SDV), your subroutine formatting is OK but there is something wrong with your properties computation.

Regarding your subroutine, I think strain is not a scalar quantity, you should check the dimensions section and set it to strn(nblock, ndir+nshr), as you are setting the block size for that variable, but not setting the data type. Check that for temperature and strain rate as well. I recomend you a good Fortran knowledge base to deal with these kind of problems.

best wishes!

 

[V_S_B]

Sorry for replying late
can you tell me which components in rData will be shear components, for example s12 for element 1,2,3... etc

 

[FEA way]

This is described in the "Component ordering in symmetric tensors" paragraph of the documentation chapter about this subroutine. Shear stress components are returned as:

4 - S12
5 - S23
6 - S31