December 20, 2022 at 8:55 amRajeshSubscriber
I need help and preceise information about using COMBIN39 elements when plane strain is assumed. I am sure, that there is problem with connection. I imagined that I need to only create two nodes for each spring -> for begin and end part of spring and then that i have to use COMBIN39 elements next. My connection does not work however and I need some clues.
Case is very simple: ET,1 is PLANE183 with KEYO that are set for plane strain. Also linear and nonlinear springs at the bottom. I want to control UY displacement of springs via real constants. Springs are defined as ET,2 (linear springs) and ET,3 (nonlinear springs).
I am definitely missing something about COMBIN39 and I dont understand the idea of coincidence when using springs.
You see, a professional help is needed... I think someone who know how it works can say: oh you didnt apply RBE3 or sth like that, but need some help and clear instructions.
Here is my code (i marked part that is not necessary to check and can be skipped):
ET,1,PLANE183,,,2 ! KOP3 = 2 so plane strain
!--------------- YOU CAN SKIP THIS it works OKAY, next section indicates where problems arise ------------------------
!--------------- I THINK THIS SECTION INDICATES THE PART WHEN PROBLEM OCCURS ------------------------
!real constants for linear springs
!real constants for nonlinear springs
!COMBIN39 creation (linear behavior of springs)
!COMBIN39 elements creation (nonlinear behavior of springs)
! AND NOTHIN' HAPPENS probably because i cannot combine springs with the rest of the system
December 20, 2022 at 3:29 pmMike RifeAnsys Employee
The body is not constrained in X as the springs only act in Y. Try constraining the lower left node of the body in X and solve just as a test. Then decide how to constrain the model in X...maybe some weak springs that act in X direction. Mike
December 22, 2022 at 5:04 pmRajeshSubscriber
Thank you for reply i will test it soon :)
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