Hi all ... I did a simple one element elastic simulation of VUMAT and everything
(force balance) is fine.My aim is to change
young's modulus during runtime using strain rate data. So i want to
write VUMAT for the elastic model only and plastic model
(Drucker-Prager) and damage models i want to use the inbuilt one. But
when i tried to run *drucker prager along with my VUMAT i got the
following error.
The option *user material,type=mechanical completely
defines the material behavior. It can not be used with an option that
defines part of a material`s behavior
*drucker prager requires the use of *elastic, *porous elastic, or the combination of *eos and *eos shear, type=elastic options
A material property that is not allowed with a user material has been specified
Analysis Input File Processor exited with an error.
As
i dun want to code drucker prager and rest of the stuff. Is there a way
to tell *drucker prager tht my VUMAT actually the *Elastic?. Thanks.
VUMAT Error
Hi,
I am quite sure that this is not possible. You can not combine built in material features with vumat-material routines.
Regards
Martin J. Gross
www.matfem.de
Possible to call inbuilt models from VUMAT
Thank you so much for the reply Martin. Is it possible to call in built material models from inside a VUMAT by passing appropriate parametrers? Like by passing updated stress into a standard *Plastic model to check for yeilding. Thanks.
Priya.