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
Participating: Professor Eugenio Oñate, CIMNE, Barcelona, Spain
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, www.cimne.com/dempack) for non-cohesive and cohesive materials. the FEM and the Particle Finite Element Method (PFEM, www.cimne.com/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