Interface laminate problem

Hi, I'm having problem making the interface laminate work as it should. I would be very thankful if someone could help with this problem.

 

I'm trying to model a battery casing the same way it would be manufactured, in our case the inner ribs would be laminated onto the outer frame and the floor of the casing. At all other edges, elements are detached from each other.

 

I double checked all the ply definitions (surfaces) and the order of plies in the interface (followed the normals) but the problem will not go away. I am using PCOMPP property card with Z0 'real', and blank Z0.
The problem occurs on surfaces where there is a change in element normals. Except for that, the problem also occured only on one of the two identical ribs (on each side the normals are the same, but the result is different).

 

 

 

I had some experience before with interface laminates but it seems like I'm missing something. I can upload the model if it is needed?

Thanks in advance,

Matt

 

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