Implementation and Validation of an Advanced Hypoplastic Model for Granular Material Behavior

Problems in soil mechanics and geotechnical engineering are often characterized by large deformations and complex material behavior. For example, the mechanical behavior of granular materials like sand is highly nonlinear due to the presence of an evolving internal structure formed by the grains. The strength and stiffness is generally a function of the stress and density state and the loading history. While LS-DYNA® has proved to be among the most robust hydrocodes for modelling large deformations and dynamic problems, it currently does not provide material models capturing granular material behavior over a wide range of stress and density states under monotonic and cyclic loads with only one set of parameters for a specific granular material and incorporating state parameters such as void ratio.