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Summary Consistent and accurate representation of geometry is required by a number of applications such as mesh generation, rapid prototyping, manufacturing, and computer graphics. Unfortunately, faceted Computer Aided Design (CAD) models received by downstream applications have many issues that pose problems for their successful usability. Automatic or semi-automatic tools are needed to process the...
This paper describes a method for extracting feature edges of a polygonal surface for mesh generation. This method can extract feature edges from a polygonal surface typically created by a CAD facet generator in which typical feature edge extraction methods fail due to severe non-uniformity and anisotropy. The method is based on the technique called “polygon crawling,” which samples a sequence of...
Summary Having reliable finite element (FE) meshes is one of the basics of reliable FE simulations. As development times i.e. in the car industry are expected to decrease, engineers need to edit and optimise FE meshes without access to the underlying CAD geometry. If meshes are not only locally effected by the editing operation, simple mesh optimisations such as mesh relaxation or local remeshing...
This paper deals with structured grid generation using Floater’s parametrization algorithm for surface triangulation. It gives an outline of the algorithm in the context of structured grid generation. Then it explains how the algorithm can be used to generate a structured grid over a singular NURBS surface patch. This is an alternate method to the known carpeting method of reparametrization for structured...
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