MAXPS damage

Hi everbody,

I am trying to study about carck propagation in a material. The part is 2D deformable and I am going with XFEM for the analysis. 

Can you please tell me how to calculate the MAXPS damage under Damage for Traction Laws?

Elastic Modulus of the material: 0.031 (Newton per micrometer square)

Load: 0.15 um displacement in the 'x' direction = 1.2245e-3 N in the x direction

I am using Abaqus /CAE 6.10

Any kind of help will be appreciated.

Thanks