Omid Reza Barani - Dept. of Civil Engineering, K.N. Toosi Univ. of Technology, P.O. Box ۱۵۸۷۵-۴۴۱۶, Tehran, Iran.
Hossein Bagherzadeh - Dept. of Civil Engineering, K.N. Toosi Univ. of Technology, P.O. Box ۱۵۸۷۵-۴۴۱۶, Tehran, Iran.

Simulations of large deformation problems with multi-body interactions are among the most appealing and challenging problems in geotechnical engineering. In this study, material point method as a meshless and robust numerical tool is used to model large deformation problems with cohesive-frictional interfaces. To consider multibody interactions between distinct bodies, the multi-velocity field contact methodology is introduced to material point method to model multi-body interaction between distinct bodies. Finally, the cohesive-frictional contact methodology is implemented to the Material point method via multi-velocity field. To validate the contact methodology, two numerical large deformation dynamic benchmarks are simulated. Rolling of a sphere with limited contact surface on a frictional inclined plane and sliding of a block with larger contact surface on the cohesive-frictional inclined surface are simulated. The result of material point method simulations and the closed form solution of benchmarks are in excellent agreement

Material point method, Multi-body interaction scheme, Cohesive-frictional contact methodology, 3D simulation.