ABAQUS Expl: Elements Not Failing

[Joe Cyrne]

I am modelling a crash where a rigid plate comes from above a box made of brittle material (composite). I am using CZONE add-on and Tsai-Wu failure criterion to model and my material has these characteristics:
*Material, name=CFRP
*Density
1750.,
*Elastic, dependencies=1, type=LAMINA
7.1e+10, 7.1e+10, 0.07, 3.6e+09, 3.6e+09, 3.6e+09, ,0.
710000., 710000., 0.07, 36000., 36000., 36000., ,1.
*Depvar, delete=1
3
1, STATUS, "Status of the section point"
2, TSAIWUCRT, "TSAI-WU damage initiation criterion"
3, SDEG, "Scalar stiffness degradation"
*USER DEFINED FIELD, CZONE, properties=16
** TSAI-WU FAILURE STRESSES
950e+06, -760e+06, 950e+06, -695e+06, 132e+06, 1
** ORIGINAL MATERIAL STIFFNESSES AND ABSORBED ENERGY
** E1, E2, nu12, G12, FRACTURE ENERGY
71e9,71e+09, 0.07, 3.6e+09, 25000000
** DEFINE CZONE MATERIAL PROPERTIES
*CRUSH STRESS
111.9e6,0
etc...
Now, I obtain higher stresses than the failure stresses I defined for my material but the elements still don't fail. The structure is behaving like it is "infinitely elastic". Any insights? Thank you
PS - The photo does not show max stress > failure stress but I increased the mass of the rigid plate and the structure still did not fail, even though the stresses were higher