Hi every body.

I`m going to do crack growth analysis with XFEM method and validation with experimental test.

The material is Aluminum 2024-t3. 

My issue:

The Maxps & Maxpe what exactly parameter in material property and whats the relation with yield`s parameter ?

Which one Maxps & Maxpe criterion, most proper for ductile material ?

In damage evolution, mixed mode behavior, which fracture energy be define ?  

Abaqus ​​​​​​​