creating output graph for force vs crack length

[abaqusian]

Hi,

I have done a crack propagation simulation in abaqus through XFEM. There are two parts bonded together. A zone of crack/damage is created near the bonded area of two parts. The simulation ran properly and the crack propagates.

Now , i would like to check the graph between the crack propagation vs the force required. Can anyone suggests what output variables would be useful ? Which one represents crack propagation/length and which is for force ?

regards.