UMAT & INP communication issues

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UMAT & INP communication issues

Abaqus Users mailing list
Hi All,

What would be some reasons for a .INP for to not pass PROPS values or even NPROPS value to the UMAT?

I have done a print check in my UMAT and all my PROPS values are E-300 type numbers, and NPROPS is -143541113 (junk value). All other inputs from abaqus to the UMAT such as DFGR1 etc all have correct values. Its only PROPS and NPROPS that is the issue. Here is an excerpt of my .inp file where im calling the material
 
 *Material, name=Material-1
 *Depvar
 1,
 *User Material, constants=11
 0.078399999999999997, 0.011900000000000001, 0.0304, 0.0511, 0.011900000000000001, 0.078399999999999997, 0.032800000000000003, 0.0137
 0.032800000000000003, 0.019400000000000001, 0.9

It all compiles and the job runs, but since there are no material parameters, there is no stress.

Not sure why this might be happening. PROPS and NPROPS has been defined in the subroutine header and dimensions in the fortran file. It just appears this set of info is not being passed on tho the UMAT.

Thanks!
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Re: UMAT & INP communication issues

Abaqus Users mailing list
check whether Abaqus can read numbers in double prec from the inp-file, I'm not sure whether that works.


Alternatively, there may be some encoding problem with your characters
(depending on your laguange environment), perhaps even invisible characters.


> Hi All,
>
> What would be some reasons for a .INP for to not pass PROPS values or even NPROPS value to the UMAT?
>
> I have done a print check in my UMAT and all my PROPS values are E-300 type numbers, and NPROPS is -143541113 (junk value). All other inputs from abaqus to the UMAT such as DFGR1 etc all have correct values. Its only PROPS and NPROPS that is the issue. Here is an excerpt of my .inp file where im calling the material
>
> *Material, name=Material-1
> *Depvar
> 1,
> *User Material, constants=11
> 0.078399999999999997, 0.011900000000000001, 0.0304, 0.0511, 0.011900000000000001, 0.078399999999999997, 0.032800000000000003, 0.0137
> 0.032800000000000003, 0.019400000000000001, 0.9
>
> It all compiles and the job runs, but since there are no material parameters, there is no stress.
>
> Not sure why this might be happening. PROPS and NPROPS has been defined in the subroutine header and dimensions in the fortran file. It just appears this set of info is not being passed on tho the UMAT.
>
> Thanks!


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