Generalizing the advancing front method to composite surfaces in the context of meshing constraints topologyReport as inadecuate

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1 G-SCOP SIREP - SIREP G-SCOP - Laboratoire des sciences pour la conception, l-optimisation et la production 2 Département de Génie Mécanique 3 UQTR - Département de Génie Mécanique Québec 4 IMAGINE - Intuitive Modeling and Animation for Interactive Graphics & Narrative Environments Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble 5 LIPPS - Laboratoire d-ingénierie des produits, procédés et systèmes Québec

Abstract : Being able to automatically mesh composite geometry is an important issue in the context of CAD-FEA integration. In some specific contexts of this integration, such as using virtual topology or meshing constraints topology MCT, it is even a key requirement. In this paper, we present a new approach to automatic mesh generation over composite geometry. The proposed mesh generation approach is based on a generalization of the advancing front method AFM over curved surfaces. The adaptation of the AFM to composite faces composed of multiple boundary representation B-Rep faces involves the computation of complex paths along these B-Rep faces, on which progression of the advancing front is based. Each mesh segment or mesh triangle generated through this progression on composite geometry is likely to lie on multiple B-Rep faces and consequently, it is likely to be associated with a composite definition across multiple parametric spaces. Collision tests between new front segments and existing mesh elements also require specific and significant adaptations of the AFM, since a given front segment is also likely to lie on multiple B-Rep faces. This new mesh generation approach is presented in the context of MCT, which requires being able to handle composite geometry along with non-manifold boundary configurations, such as edges and vertices lying in the interior domain of B-Rep faces.

Keywords : Shape Defeaturing Virtual topology Composite geometry Advancing front Mesh generation Mesh adaptation

Author: Gilles Foucault - Jean-Christophe Cuillière - Vincent François - Jean-Claude Léon - Roland Maranzana -



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