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No cohesive element was generated, missing midside node(s) or other connectivity issues

No cohesive element was generated, missing midside node(s) or other connectivity issues

No cohesive element was generated, missing midside node(s) or other connectivity issues


thread569-287729: missing midside nodes

My model is an fiber reinforced composite with two different ET. For the Fiber i have tetrahedral elements SOLID187 and von the matrix i use SOLID186. For the ET for the interface between these elements it is INTER204.
After selecting both elements for the CZMESH, this error occurs:

"No cohesive element was generated between solid elements xxx and xxx
(and possibly others) because of missing midside node(s) or other
connectivity issues."

I'm new in Ansys and i want to understand my problem. Why this warning come apart?

My CZM code:
VSEL,S,,,1,,1 ! This is the fiber volume

VSEL,S,,,2,,1 ! This is the matrix volume
CM, matrixElem, ELEM

TYPE,4 ! Interface element type INTER204
MAT,3 ! CZ material


After this, it shows me the interface elements (interface.png). But it seems that not all elements are CZE. (no cze.png)
My meshing: i take the frontarea from the matrix as 'startarea', mesh it with AMESH, and then sweeping to the backarea as 'targetarea'. Is there coming up these connectivity issues?

I would be very appreciate for your help.
With best regards

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