Unconverged Mohr-Coulomb Plasticity, ABAQUS
Dear Abaqus Users,First of all, I want to clarify that I am a beginner in Abaqus (only few months) and new in iMechanica. I have been modeling an excavation in Abaqus/CAE. I am using several layers of soils which have been modeled using Mohr-Coulomb model, the wall as an elastic material. Both the wall and the soils were modeled with 2D solid elements (plane strain).I have been facing with lots of problem with the interaction of the first layer and the wall, "UNCONVERGED MOHR-COULOMB PLASTICITY" in the GEOSTATIC STEP!!!!. The first layer does not have cohesion, only friction which is 30 degrees (sand). After increasing the cohesion value for this layer, I can avoid this ERROR. But, lamentably, I am changing the whole problem with high values of cohesion which are around 30 kPa. The same effect can be reached using a surcharge which does not exist. Do you have any recommendation of how to solve this problem without changing the material properties? Thank you very much!!!
PS: This is the problem I can see in Job Diagnostics... (image attached)