Presentation Information
[250202-02-01]Integrating Multiphysics and Particle-Based Techniques: A New Frontier in Natural Hazard-Structure Interaction Modeling
Prof. Antonia Larese (Università degli Studi di Padova)
Climate change has intensified the frequency and severity of natural hazards involving large mass movements such as landslides, debris flows, and mud flows. These phenomena pose significant threats to structures, landscapes, and human life, necessitating urgent scientific attention and effective mitigation strategies.
The numerical simulation of these events presents significant challenges, primarily due to the need to handle large strain regimes and their intrinsic multiphysics nature. While the Finite Element Method (FEM) is well-established in many engineering fields, it shows limitations when dealing with large deformations and complex material laws. To overcome this crucial drawback, particle-based methods have emerged as groundbreaking solutions. Among these, the Material Point Method (MPM) stands out as a hybrid technique that blends the advantages of both mesh-based and mesh-less methods.
This study presents recent advances in MPM formulations, including irreducible and mixed formulations stabilized using variational multiscale techniques, as well as partitioned strategies to couple MPM with other methods like FEM or DEM, further enhancing its versatility in multiphysics simulations. These novel numerical formulations aim to accurately simulate multiphysics phenomena involving the interaction of water, air, particles, complex boundaries, and soil in mountainous contexts.
The research focuses on high-fidelity modeling of water-related hazards and their interaction with structures or protection systems. Additionally, recent work on acoustic wave emission, potentially crucial for early warning systems, is presented. All algorithms are implemented within the open-source Kratos-Multiphysics framework.
The numerical simulation of these events presents significant challenges, primarily due to the need to handle large strain regimes and their intrinsic multiphysics nature. While the Finite Element Method (FEM) is well-established in many engineering fields, it shows limitations when dealing with large deformations and complex material laws. To overcome this crucial drawback, particle-based methods have emerged as groundbreaking solutions. Among these, the Material Point Method (MPM) stands out as a hybrid technique that blends the advantages of both mesh-based and mesh-less methods.
This study presents recent advances in MPM formulations, including irreducible and mixed formulations stabilized using variational multiscale techniques, as well as partitioned strategies to couple MPM with other methods like FEM or DEM, further enhancing its versatility in multiphysics simulations. These novel numerical formulations aim to accurately simulate multiphysics phenomena involving the interaction of water, air, particles, complex boundaries, and soil in mountainous contexts.
The research focuses on high-fidelity modeling of water-related hazards and their interaction with structures or protection systems. Additionally, recent work on acoustic wave emission, potentially crucial for early warning systems, is presented. All algorithms are implemented within the open-source Kratos-Multiphysics framework.