constraint controls, no checks

[prophgr]

Hello everyone,

I am trying to model a quarter RVE UD composite and calculate it's efective properties
Due to the tie constraint i use for the interface plus the axisymetric contrains in the three faces of the cube i get an overconstraint warning when i run the model which however doesnt affect the solution, but when i increase the mesh i get this warning message:
VERCONSTRAINT CHECKS: THERE ARE 21195 BOUNDARY CONDITIONS SPECIFIED IN THIS MODEL. OVERCONSTRAINT CHECKS FOR BOUNDARY CONDITIONS SPECIFIED ON SLAVE NODES OF RIGID BODIES, OF *TIE OPTIONS, OR OF *COUPLING OPTIONS REQUIRE 8 Mb OF MEMORY. IF THIS IS A PROBLEM, PLEASE TURN OFF OVERCONSTRAINT CHECKS USING *CONSTRAINT CONTROLS, NO CHECKS or INCREASE THE MEMORY USED BY THE PRE-PROCESSOR.

I need to disable constrain controls graficaly however because i need the .jnl file with all the comands to build a python script for parameterization can anyone help me find where this option is?

Thanks in advance

 

[Mustaine3]

Model > Edit Keywords

Why don't you take out the regions that are overconstraint from the tie or boundary?

 

[prophgr]

Because i need to define the nodesets by geometry so they remain when i change the mesh through python script

 

[Mustaine3]

You can select a face and deselect edges of that face with ctrl+leftclick.
With that is is easily possible to avoid overconstraints.

 

[IceBreakerSours]

As Mustaine3 pointed out, you are asking a node (more specifically, a DOF at a node) to do more than one thing at the same time. That is non-physical (and hence the term overconstraint).

Are you new to this forum? If so, please read these FAQ:

http://www.eng-tips.com/faqs.cfm?fid=376

http://www.eng-tips.com/faqs.cfm?fid=1083

 

[prophgr]

Ok thanks a lot that worked out, i was under the impresion that excluding edges is only posible when its TYPE: NODE