Need help with Piled Raft Modeling 1

[swapy0498]

Hello everyone, I'm a master's student trying to model piled raft foundation.

I've modelled my piles and raft as elastic material and for soil I've used drucker Prager plasticity. For interactions I've used master slave concept and I've used the option *find contact pairs* in *interaction section* which automatically finds contact between pile, raft and soil and I've used finite sliding. Is there any problem with my modeling?

When I try to run the job *without plasticity (only elastic)*, it is getting completed but if I *use plasticity* for soil (I've even tried it with Mohr Coulomb) it gets aborted.

The errors which I faced were plasticity/creep did not converge and negative Eigen values.

Can someone please help me with this problem.

Also, there is an option for cap plasticity in ABAQUS. What's the difference between selecting *drucker Prager* option and *cap plasticity option*?

Here is my file link bit.ly/3oj9A0y

 

[FEA way]

What you get here is a typical non-convergence error. It's very common in case of nonlinear analyses. Try enabling automatic stabilization in step settings. Also check all units and make sure that material properties and loads are properly defined.