DEM simulations using convex NURBS particles
- verfasst von
- Marina Vendl Craveiro, Alfredo Gay Neto, Peter Wriggers
- Abstract
Contact detection is one of the most important steps to be handled during numerical simulations of particle systems. It is extremely dependent on particle geometry, which governs the mechanical behavior of systems and the computational cost of simulations. NURBS are an option to model the boundary of particles with nonstandard geometries, here called “NURBS particles”. The contact between NURBS particles, however, is not trivial. The present paper presents a complete contact detection algorithm for convex NURBS particles, which automatically performs a hierarchy of contact searches. It is based on computer graphics and optimization techniques to address local contact. For robustness, specific strategies are implemented to model closed NURBS geometries, indicating the occurrence of local geometric imperfections when using multiple NURBS parameterizations. The main novelty of the work is related to a degeneration of the local contact problem to deal with such imperfections, which allows using general particle geometries. Numerical examples demonstrate the robustness of the proposed algorithm.
- Organisationseinheit(en)
-
Institut für Kontinuumsmechanik
- Externe Organisation(en)
-
Universidade de Sao Paulo
- Typ
- Artikel
- Journal
- Computational Particle Mechanics
- Band
- 11
- Seiten
- 1087-1118
- Anzahl der Seiten
- 32
- ISSN
- 2196-4378
- Publikationsdatum
- 06.2024
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Numerische Mechanik, Tief- und Ingenieurbau, Numerische Mathematik, Modellierung und Simulation, Fließ- und Transferprozesse von Flüssigkeiten, Computational Mathematics
- Elektronische Version(en)
-
https://doi.org/10.1007/s40571-023-00675-x (Zugang:
Geschlossen)
