[Question] Parameters involved in UMAT

[aquila652]

Hi all,
This is my first participation and I hope that it'll not be the last one.
I've gone through many topics here and the forum is really interesting, full of informations !!!
I have 2 questions, the first one : I have to use a UMAT subroutine where 39 material properties are defined. Is there any limitations considering the number of these parameters ??? and the second one, is there anything else to introduce in defining the model except of those parameters and the number of DEPVAR ???
Thanks for help !

[Jorgen]

As far as I know, there is no limit on the number of material parameters that an ABAQUS UMAT can take. And no, all you need are the material parameters and the statevariables.

Best of luck,
- Jorgen

[aquila652]

Thanks a lot ! because I'm new to this field, I'm finding many problems in understanding some aspects of umat coding. I've gone through abaqus documentation but find it still difficult to understand.