Debonding of web and flange connection of FRP I-beam

Hello everyone

I want to model the contact non-linearity between flange-web connection of FRP I-beam. I have modeled the flange and web of 3D deformable of shell element. I can't use VCCT technique between flange-web connection because it is based upon two surfaces not on one edge (i.e. web) and one surface (i.e. flange).

Kindly give some guidance to model the debonding of flange and web of I-beam.