Using the CEINTF Command

[Stringmaker]

I'm trying to join two adjacent solid regions using the CEINTF command. Having never used this command before and I think what I'm having trouble with is selecting the appropriate nodes and elements. I understand that it's typically recommended that the nodes of the finer meshed surface and elements of the coarser mesh be selected. How does one go about selecting both nodes and elements simultaneously? I've tried a variety of different ways and I've yet to successfully create any constraint equations. BTW, I'm using the GUI to do this. Can anyone offer any insight here?

Also, I've used the MPC algorithm in the contact wizard millions of times to generate bonded contact between dissimilarly meshed regions. Are there any conditions where one method (MPC vs. CEINTF) is better to use than the other? Is one less expensive from a computational standpoint?

Thank you,
-Brian

 

[nodalDOF]

Try this

!Assuming type1 is denser
esel,,type,,1 ! Select->Entities->elements/ByAttrib/type 1
nsle ! ----------------->nodes/attachedto/element
esel,a,type,,2 ! Same as line1 with "also select"

 

[JaStKn]

To connecting two ore more parts with different meshes, the better way is the use of bonded contact with mpc-algorithm.

These elements create also constraint equations but these equations will be updated at each iteration. Standard ces are the same at all time. If you have large deformations / rotations the starting ces are incorrect at a later time.

I'm not shure but I think the command
cntr,cno3,1 bevore the solve command save the generated ces after the solution.

/solu
cntr,cno3,1
solve

/pbc,ce,1
eplo

(for the contact elements exist the rule: bigger elements => targed elements)

best regards ... Stefan.