Damage Evolution: ABAQUS Fracture Energy Parameters

I'm using a damage evolution model in XFEM in order to model crack growth, however I am trying to identify the correct Mode I fracture energy for my problem. In particular there seems to be an issue with the units of fracture energy in ABAQUS.

I am using Damage for Traction Separation Laws, Maxps; Damage Evolution Type = Energy; Mixed bode behaviour = Power Law with power value 1; Now at the bottom what should be the input values of Normal Mode Fracture Energy, Shear Mode Fracture Energy 1st direction and Shear Mode Fracture Energy 2nd Direction.

My material is aluminium with E=72GPa, v=0.33, and Yield=275MPa, if anyone can help me establish my fracture energy values that would be much appreciated.