Dear colleagues, 
I want to simulate the failure of a low density foam, I have set the parameter as in (figure 1),
and when I try to solve it, the material does not fail. I want to simulate the failure of EPS material, How do I make it? 
another thing, when I solve in explicit dynamic i do not get any problem however, when i simulate is static step or implicit step I got error too many attempts has occur. and I got this warning massage which is mentioned in (fig2)