Hi,

If after applying all above still you face the same error, then I suspect it's a computational issue rather than a  programming issue e.g. the stress or strain values returned from your UMAT code are infinite.

Therefore, I suggest for a simplified model, test your subroutine and for example check the returned stress values from your UMAT code. You may do it using the command "Print" or "write" through your subroutine.  In case you don't know how, for example somewhere in your subroutine put:

write(*,*)'UMAT is called'

print,'STRESS1=', stress(1)

Do the same for any parameter you have defined in your UMAT code and check if their values are normal  (not infinite). If you see any infinite value, surely that would be one of the reasons that your OUTPUT cannot be displayed and you have to modify your calculations. The above-mentioned values (e.g. STRESS1) are normally written in the *.log file. 

Best of luck.

Navid

Hi

you should active SDV in field output requests to show them.

Hi

Can you tell me, How can I active it?1

yes, 

open Cae file==>Field output requests==>State/field/user/time==>SDV

like below

I did it but I got that error again.

thanks for your attention.

I have 6 SDVs and I specify 6 in depvar. When I want to specify a value greater than like 8 in depvar, I get this error "There are insufficient data cards to define the 8 solution dependent variables for elset assembly_set-9".

I think I get this error because I enter 6 intial value in "Initial Condition" in keywords.

Hi

Construction times the line

* OUTPUT, FIELD, VAR = ALL

in an input file. It will then output all sizes.

Good Luck !

Hi to dear user

I want a umat fortran code and the procedure that a fortran file attach to Abaqus.

thanks a lot

Hi Dear Mohammad Rrezaei:

see this book:

Introduction to Computational Plasticity, Fionn dunne & Nik petrinic

this book contains some UMAT code in it's appendix that you can use it.

Good kuck !!!

Did you solve this problem ?　I'm facing with a similar problem. I modeled a plane strain test with Subroutine of  Lade model. It can complete. However, the results can only shown until a certain step. After the certain step, it shows "The selected primary variable is not available in the current frame for any elements in the current display group".  

Hi,

If after applying all above still you face the same error, then I suspect it's a computational issue rather than a  programming issue e.g. the stress or strain values returned from your UMAT code are infinite.

Therefore, I suggest for a simplified model, test your subroutine and for example check the returned stress values from your UMAT code. You may do it using the command "Print" or "write" through your subroutine.  In case you don't know how, for example somewhere in your subroutine put:

write(*,*)'UMAT is called'

print,'STRESS1=', stress(1)

Do the same for any parameter you have defined in your UMAT code and check if their values are normal  (not infinite). If you see any infinite value, surely that would be one of the reasons that your OUTPUT cannot be displayed and you have to modify your calculations. The above-mentioned values (e.g. STRESS1) are normally written in the *.log file. 

Best of luck.

Navid

Dear Yonggui,

I had solved my problem, reason of that error was the jacobian (DDSDDE) had become infinity. I found that parameter that be infinity with typing WRITE in umat just like Mr.navid saied.

best regards

Hi Kadda

you can write like this in your subroutine:

WRITE(7,*) 'DSTRES',DSTRES(1),DSTRES(2),DSTRES(3),DSTRES(4)

after submitting, see the "Message file" in your job monitor and find the parameter is being infinity (NaN).

for example, in my problem, I saw DSTRES(2) was being NaN. The eqution of that was: DSTRES(2) = -(dp+2.0*dq/3.0)

then I wrote:

WRITE(7,*) 'dp',dp

WRITE(7,*) 'dq',dq

and finally I found that parameter was being infinity and solved it.

Dear All,

One of the other cause of this problem especially in coupled thermo-mechanical analysis is that the heat flux is NaN, so not that the body heat flux or surface heat flux is correctly calculated as an input variables.

Dear Mehran

im working on thermo mechanical step, i used the HETVAL subroutin for giving Heat generation to specimen.the heat generation is function of S, as the others said , my model could run with out any problem but in visulation module i faced with this error:he selected primary variable is not available in the current frame for any elements in the current display group".

i was wondering if you can give me a hint .

best regards

maryam

@Maryam Ghasemzadeh You can directly enter the value of heat generation vs. time in abaqus without using HEATVAL, actually it depends on your problem, from the loads you can select thermal and then body heat flux. Have you tested this method? I want to know that do you use HETVAL coupled with other subroutines?

Oh no solution

T____T

some variables may be infintely large, Pay attention to whether the divisor is close to 0 when there is a division operation

Dear Navid Bavi ：

I am troubled by the same problem too and I try to solve the problem according to your advice. Finally I deal with it.

Thank you very much!

Liu Newly

Atefe Geramian Hi, can you tell me how exactly did you solve the problem ?

I am facing an infinity value problem same as yours i believe , and I am looking for a solution. Though, the our problems might be different, but that would be just a good hint.

Thanks !

Yes, you may check that whether the denominator you define is easy to be zero or always zero.