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

Xi Zou Orcid Logo, Sui Bun Lo, Rubén Sevilla Orcid Logo, Oubay Hassan Orcid Logo, Kenneth Morgan Orcid Logo

Computer-Aided Design, Volume: 168, Start page: 103653

Swansea University Authors: Xi Zou Orcid Logo, Sui Bun Lo, Rubén Sevilla Orcid Logo, Oubay Hassan Orcid Logo, Kenneth Morgan Orcid Logo

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DOI (Published version): 10.1016/j.cad.2023.103653

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 geometr...

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Published in: Computer-Aided Design
ISSN: 0010-4485
Published: Elsevier BV 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa65064
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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.
Keywords: De-featuring; Exact geometry; High-order approximation; Mesh generation; NURBS-enhanced finite element method (NEFEM); Computer aided design; Mesh generation; Wave propagation; Finite element method
College: Faculty of Science and Engineering
Funders: EPSRC, EP/T009071/1
Start Page: 103653

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