You are here
DOFs in Abaqus
Fri, 2012-11-23 10:53 - salingerv
Hi,
I got a simple 2D problem (a rectangular shell, static general, CPS4R element), with 557 nodes, each of them have 2 DOFs (U1 and U2), according to the data file. But when I print out the ELEMENT STIFFNESS MATRIX, for each element it is a 12x12 matrix which means the rotational DOF about z axis is also taken into account. How can I omit this 3rd DOF? Can I?
Thank you.
»
- salingerv's blog
- Log in or register to post comments
- 8054 reads
Comments
The K matrix is controlled
The K matrix is controlled by ABAQUS. All the elements corresponding to z dof should be zero (like 13, 32, 33) components. In which case, it does not make a difference whether you have them or not.
Thank you for your reply.
Thank you for your reply. I know but I was wondering if it is possible to omit them manually.
One more question, I figured that using *MATRIX GENERATE, one could get the global stiffness, mass or load matrix in a ".mtx" file. But I am wondering why I can't get the file after the run.
https://www.sharcnet.ca/Software/Abaqus610/Documentation/docs/v6.10/book...
Here is the keywords:
*HEADING
…
**
**
** STEP: Step-1
**
*Step, name=Step-1
*Static
1., 1., 1e-05, 1.
*MATRIX GENERATE, STIFFNESS, MASS, LOAD
**
** BOUNDARY CONDITIONS
**
** Name: BC-1 Type: Displacement/Rotation
*Boundary
_PickedSet5, 2, 2
** Name: BC-2 Type: Displacement/Rotation
*Boundary
_PickedSet6, 1, 1
_PickedSet6, 6, 6
**
** LOADS
**
** Name: Load-1 Type: Pressure
*LOAD CASE, NAME=LC1
*Dsload
_PickedSurf4, P, -20.
*END LOAD CASE
**
** OUTPUT REQUESTS
**
*Restart, write, frequency=0
**
** FIELD OUTPUT: F-Output-1
**
*Output, field, variable=PRESELECT
**
** HISTORY OUTPUT: H-Output-1
**
*Output, history, variable=PRESELECT
*End Step