Hi Everybody,
I want to average the strains/stress in the reduced integration elements in a UMAT subroutine. Is there any function/variable that can used inside UMAT?
We know that there is NOEL parameter inside the UMAT that corresponds to element number. So can we link this parameter to volume? OR Is there any parameter for element volume in UMAT subroutine?
Best regards,
A.
Thanks for your reply,
EVOL, is not defined inside the UMAT :( It is in "output" part of ABAQUS.
One workaround that I can think of is to store the initial volume in a state variable and keep updating it based on DSTRAN value. Depending on the loading, it could be difficult to implement.
In Abaqus UMAT, there is default variable 'charLength(i)'. This is the cube root of Volume.
Initial element volume can be get from it V0=charLength(i)^3. As the volume of element will change if damage mechanics is introduced, the instantaneous volume should be updated by V=det(F)*V0.
It is better to store this value in a StateVaribles SDV.
Cheers
- Badges
- Science topic
- Similar topics
- Biological Science
- Physiology
- Physiological Processes
- Stress