crack propagation cohesive elements fracture criterion

Hello,



I have been reading up a lot  on "crack propagation" and "cohesive elements" in Abaqus. But i am still struggling to make it run and frankly i am running out of time. I have got only two more days to get the model running for a kind of "Introducing modern science to the public" exposition... I am trying to simulate crack propagation in rubber material in the case of uniaxial tension.



I recall the problem that i want to simulate: