I am using the UMAT code for sand hypoplasticity provided by Prof. Masin — https://soilmodels.com/download/plaxis-umat-hypoplas-zip/. I am simulating Axisymmetric condition in Abaqus. To check the results given by the hypoplastic model for sand. I started with a simple model as shown here. I have two steps: Geostatic step and pressure step. The parameters used as shown in the figures. I added permeability for the soil (as shown below) because I need it.
The problem is when I run the model using the UMAT code, it completes without showing/implementing any step calculation (photo attached) and no results will be found. When I use one of the materials models built in Abaqus, the model runs correctly. What is the issue. could you Please help !!.
Thanks in advance.