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Eugenio Oñate's KEYNOTE seminar "Combination of particle-based methods and the FEM for solving multidisciplinary problems in engineering and applied sciences"

Time: Thu 2022-09-15 16.15

Location: zoom

Participating: Professor Eugenio Oñate, CIMNE, Barcelona, Spain

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Eugenio_Onate_ Sep_15_2022.pdf (pdf 181 kB)

Abstract. We present advances in the development and application of a new particle-discrete-finite element method (called PDFEM) based on the blending of an enhanced discrete element method (DEM, for non-cohesive and cohesive materials. the FEM and the Particle Finite Element Method (PFEM, The PDFEM allows the study of flows incorporating particles of different sizes and their interaction with structures, accounting for frictional contact and multi-fracture effects. The main goal is to solve particulate fluid-solid-structure interaction problems at the scales that are necessary for predicting the response of the system with accuracy and reliability. The PDFEM uses a Lagrangian description to model the motion of the physical particles within a fluid and nodes (“virtual particles”) in both the interacting fluid and the solid domains. These domains are discretized with a mesh in which the governing equations for the corresponding continuum problem (i.e. a fluid or a solid) are solved using the FEM. The analysis mesh is re-generated at each time step. The interaction between the discrete particles with the underlying fluid is modelled via an embedded technique. Structural failure is predicted using a combination of FEM and DEM procedures. In the lecture we present applications of the PDFEM to several problems in civil, environmental, marine & mechanical engineering. toughness. This work was performed in collaboration with Christian Peco, now at Penn State University, and Yingjie Liu, now at Cubist