A GEOMETRIC MODELER FOR GENERATION OF TWO - AND THREE - DIMENSIONAL FINITE ELEMENT MESHES / INTEGRACIÓN DE ALGORITMOS DE GENERACIÓN DE MALLAS DE ELEMENTOS FINITOS / INTEGRAÇÃO DE ALGORITMOS DE GERAÇÃO DE MALHAS DE ELEMENTOS FINITOS

AUTOR(ES)
DATA DE PUBLICAÇÃO

1999

RESUMO

This work presents algorithms for two-dimensional and three- dimensional mesh generation of finite elements that, together with another algorithms developed by its research group, are integrated in a computational package. The mesh generation algorithms become independent of the preprocessor, and may be incorporated in different programs. An algorithm for two-dimensional planar triangular mesh generation is proposed. The algorithm incorporates new ideas, adapted from a three-dimensional mesh generation algorithm for arbitrary domains, which is focused on the generation of - optimal - shape elements. Two techniques of solid mesh generation are presented: a three-dimensional transfinite mapping, that generates the solid mesh interpolating cross-section meshes; and a sweep technique, that generates the solid mesh by sweeping a cross-section mesh along a curve in space. The algorithms are integrated in a three-dimensional geometric modeler, MG (Mesh Generation), and some examples demonstrate the modeling capability of the created environment. Specifically, the examples show the capability for composite modeling with different methods of mesh generation and different types of finite elements in the same model. A study of some distortion measures for planar finite elements is also performed. Computation of these distortion measures is implemented in a two-dimensional interactive graphics modeler. The visualization of the distortion measures is made through a color scale.

ASSUNTO(S)

elementos finitos modelagem tridimensional three-dimensional modeling finite elements elementos finitos mesh generation modelaje tridimensional geracao de malhas generacion de mallas

ACESSO AO ARTIGO

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