I am using the UMAT of hypoplastic model for simulation soil (3D modeling) under cyclic loading. The analysis was completed at geostatic step. But for consolidation step (soil, transient), the analysis was not completed. But this problem was vanish when change constitutive model of soil to Mohr Coulumb model. On other hand, and using hypoplastic model, the analysis was carried out if the step was either static general or soil (steady state). I want to use the hypoplasic model to simulate the increasing of pore pressure due cyclic load.
How to solve this problem (complete analysis in consolidation step by using hypoplastic model) please?