Dear Ahmed,

First try the option 2D DCB Specimen Modeling may be you can found a solution for your problem.

Also you can take a look at attached files this can inspire you to find the solution.

Best regards

Thanks a lot!

I already implemented DCB specimen at which the cohesive elements are defined in a straight path but i need to define in a circular path.

Dear Ahmed,

First of all, CZM has variable approaches. You can read this link to decide which one is what you want to apply in your model.

https://www.sharcnet.ca/Software/Ansys/16.2.3/en-us/help/ans_ctec/ctec_cozomatdeb.html

I have worked in this topic for 3 years old. My problem was to create bond between two volumes. I have used "Bilinear Material Behavior with Tractions and Separation Distances".

Here is ansys codes but you have to calculate the six variables.

TB,CZM,3,1,1,CBDD

TBDATA,1,3.795,0.048,8.046,1.107,1,1

CMSEL,S,VOL1

VPLOT

REAL, 131

TYPE, 170

MAT, 3

NSLL, S, 1

ESURF

ALLSEL,ALL

CMSEL,S,VOL2

VPLOT

TYPE, 174

ESURF