Good day!

I have complicated parts (View the first two images): matrix and platelets. Both fit. I needed to establish a cohesive contact between the contact surfaces so I decided to use the find contact pairs tool. But I obtain some weird pairs (view the third image). Do you know why occurs this? Please consider the Search options that I chose (Third image). This can affect the results?

In advance, thanks for your help.

Abaqus ​​​​​​​