Dear all,
do you know does any entry stored is STATEV, used in UMAT subroutine,
should remain unchanged for the next increment for the case of finite
deformation?
I know that STRESS and STRAN will be rotated by ABAQUS but what about the STATEV?
I want to protect STATEV from any rotation by ABAQUS in order to rotate
it in UMAT by my rotation matrix but I am experiencing that it is
different value at the beginning of new increment in comparison the one
as output from previous increment.
Thanks in advance,
Marina.
Hi, You can update
Hi,
You can update solution dependant state variables at the end of the increment and recover them from the start of the next increment.What you want to store in statev for your problem?
Rohith
STATEV is not rotated
Hi Marina,
The values in statev are not rotated. You need to rotate them manually if they are components of vectors or tensors.
The values should not change between two steps. Becareful, it is two steps rather than two iterations. Abaqus will reverse your modification to STATEV if an iteration is not successful.
Are you sure you are looking at the same material point?
Wei
In reply to STATEV is not rotated by Wei Hong
Hi Hongwei, I think
Hi Hongwei,
I think the 'step' should be replaced by 'increment'. In Abaqus, the hierarchy is like this, 'step'->'increment'->'iteration'. You are right. These values should not change between two increments.
Shunlai