Cohesive elements in Abaqus, emplementation or using the existing?

Good mourning everybody, i need to use cohesive element in an FE analysis using the FE code Abaqus, i'll attach a figure in which i'll show the cohesive low (that is a trapezoidal chape cohesive low) i want to use since a similar form i use in another study using an analytical method based on the integral equation approach, the cohesive from is inspired from the well known Dugdale Model this simple model can be easily used and incorporated in an analytical method, my quation is shall i implement this cohesive trapezoidal from via a user element subroutine or use an existing cohesive model in Abaqus, and in the two cases could anyone give me the steps to take in a clear manner on order to do that? any suggestion is welcome friends. Thanks you