compiling a umat without abaqus linking

[mech5243]

can anyone give me an advise how can i compile my umat with using abaqus?
I saw a lot of posts which are describing a way to compile the umat without using abaqus,and then using a file.o take the results.
is that possible?

[Jorgen]

The easiest way, and the way that I would recommend unless you have specific reasons not to, is to use the following command:

abaqus job=[jobname] user=[name of fortran file]

or

specify the subroutine name in Abaqus CAE.

-Jorgen

[mech5243]

xm i was trying to use the fortran implict command and i saw that abaqus dont allow me, thats why i tryied to compile the umat without abaqus.

But now i have one more question
I have tha E=55000000000.0000
and i defined it in abaqus as props(1)
when i use it as S=1/props(1) i got the result :1.818181818181818E-011
which is the correct one
then i try to put in my inp file that values as parameteres
and i type exactly the following lines:

*parameter
E=55000000000.0000
S=1./E

*user material,constants=2
<E>,<S>

and when i have use in abaqus the props(2) i got as result props(2)=1.818181818180000E-011
while S=1/props(1)=1.818181818181818E-011
Do you have any clue why i lost that presicion using the parameter command??

[Jorgen]

I am not sure what would cause that loss of precision. Does it work better if you do not use *PARAMETER?

-Jorgen

[mech5243]

if i use that values as parameters in fortran code...i dont have any loss in precision. I check my results using matlab and i get the same values. But when i use the parameters option,from the input file i have that loss in presision. I dont have any problem to continue my work using defined parameters in fortran. But i am couriouse what loses in precision i will have if i make a parametric model using input file capabilities... so basicaly there is all my concern and thats why i have that questions :|)