Hello everyone!

I hope you are doing well.

I am applying phase-field modeling in my work using the abaqus user element model. I compared my results with 2d sen modeling and everything was fine. But then I added complexities and in 3d modelling I found phase field parameter for some elements are less than 0 (the maximum -1e-2) but the results look good like the fractures are propagating. So what do youthink? Anyone goes through similar problem?

Below attached a figure