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The Generation of 3D Surface Meshes for NURBS-Enhanced FEM.

The Generation of 3D Surface Meshes for NURBS-Enhanced FEM.

Authors :
Zou, Xi
Lo, Sui Bun
Sevilla, Ruben
Hassan, Oubay
Morgan, Kenneth
Source :
Computer-Aided Design. Mar2024, Vol. 168, pN.PAG-N.PAG. 1p.
Publication Year :
2024

Abstract

This work presents the first method for generating triangular surface meshes in three dimensions for the NURBS-enhanced finite element method. The generated meshes may contain triangular elements that span across multiple NURBS surfaces, whilst maintaining the exact representation of the CAD geometry. This strategy completely eliminates the need for de-featuring complex watertight CAD models and, at the same time, eliminates any uncertainty associated with the simplification of CAD models. In addition, the ability to create elements that span across multiple surfaces ensures that the generated meshes are highly compliant with the requirements of the user-specified spacing function, even if the CAD model contains very small geometric features. To demonstrate the capability, the proposed strategy is applied to a variety of CAD geometries, taken from areas such as solid/structural mechanics, fluid dynamics and wave propagation. [Display omitted] • The first method to create 3D surface meshes tailored for NEFEM. • Avoided de-featuring before meshing and eliminated geometric discretisation error. • Elements can traverse multiple surfaces to respect user-specified mesh size. • Significantly improved minimum element size to relax explicit time-step requirement. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00104485
Volume :
168
Database :
Academic Search Index
Journal :
Computer-Aided Design
Publication Type :
Academic Journal
Accession number :
174666388
Full Text :
https://doi.org/10.1016/j.cad.2023.103653