cohesive

Hi all,

 I'm trying to model a 2D cohesive layer with a zero-thickness in Abaqus (6.11.2)

The shape of the layer is a quarter circle.

When modelling this i first create a cohesive layer with a certain thickness.

I then convert the part of this cohesive layer to a orphan mesh, then edit the mesh, such that a zero thickness layer is created.

However when i want to submit the job i get the following error message:

For my
graduation project I’m working on a model to describe cracking behavior. For
this model I want to model a fibre-epoxy interface, see the attached figure 1
(due to symmetry only a quarter is modeled). The fibre part is modeled with
lineair elastic material. The epoxy part is modeled with CPS4 elements, with
elastic behavior and MAXPS damage (damaged evolution included). The connection
between the fibre and epoxy interface can be modeled with both a cohesive
surface and cohesive elements.  However