Naming convention
The cohesive elements used in Abaqus are named as follows: 
For example, COH2D4 is a 4-node, two-dimensional cohesive element. For pore pressure cohesive elements that model the transition from Darcy flow to Poiseuille flow, the first three letters for the elements' names are changed to COD. For example, COD2D4P is the 4-node, two-dimensional pore pressure cohesive element with transitional modeling from Darcy flow to Poiseuille flow.