Si informa che il giorno lunedì 30 settembre 2019, alle 11:30, presso l’Aula Seminari del Dipartimento di Ingegneria dell’Università di Roma Tre, il Prof. Stefan Löhnert (Technische Universität Dresden, Institute of Mechanics and Shell Structures) terrà un seminario dal titolo:
“The XFEM/GFEM – basics and recent advances”.
Sommario
The eXtended Finite Element Method (XFEM) / Generalised Finite Element Method (GFEM) is a well established technique for the simulation of arbitrary strong and weak discontinuities such as cracks and their propagation and heterogeneities. One of the advantages is that changes in the discontinuity can be simulated without a change of the mesh leading to a great efficiency. The XFEM/GFEM incorporates so-called enrichment functions to account for the respective discontinuity within finite elements. In most cases the XFEM/GFEM is used in combination with level set techniques to reflect the geometry of the discontinuity almost independent of the finite element mesh.
In this presentation the basics of the XFEM/GFEM, important computational aspects for a robust implementation as well as current difficulties and possible solutions are presented. Applications are 2D and 3D crack propagation examples in linear elastic fracture mechanics, crack face contact, crack propagation in combination with highly nonlinear material behaviour as well as the simulation of heterogeneities under small and finite elastic and inelastic deformations.
