Reconstruction of feature volumes and feature suppression

Venkataraman, Sashikumar; Sohoni, Milind

doi:10.1145/566294.566295

Cited by 6 publications

(10 citation statements)

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“…Another approach, capable of handling more interacting shape features through an iterative method is presented in Venkataraman and Sohoni (2002), where form feature recognition techniques are used to detect features face-sets, and then a feature is removed before passing to the next iteration, where previously interfering features can be detected.…”

Section: Related Workmentioning

confidence: 99%

Functional restructuring of CAD models for FEA purposes

Shawan

Léon

Foucault

et al. 2015

Engineering Computations

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Purpose -Preparing digital mock-ups (DMUs) for finite element analyses (FEAs) is currently a long and tedious task requiring many interactive CAD model transformations. Functional information about components appears to be very useful to speed this preparation process. The purpose of this paper is to shows how DMU components can be automatically enriched with some functional information. Design/methodology/approach -DMUs are widespread and stand as reference model for product description. However, DMUs produced by industrial CAD systems essentially contain geometric models, which lead to tedious preparation of finite element Models (FEMs). Analysis and reasoning approaches are developed to automatically enrich DMUs with functional and kinematic properties. Indeed, geometric interfaces between components form a key starting point to analyze their behaviors under reference states. This is a first stage in a reasoning process to progressively identify mechanical, kinematic as well as functional properties of components. Findings -Inferred semantics adds up to the pure geometric representation provided by a DMU and produce also geometrically structured components. Functional information connected to a structured geometric model of a component significantly improves FEM preparation and increases its robustness because idealizations can take place using components' functions and components' structure helps defining sub-domains of FEMs. Research limitations/implications -Future research will carry on improving algorithms for geometric interfaces identification, processing a wider range of component functions, which will contribute to a formalization of the concept of functional consistency of a DMU. Originality/value -Simulation engineers benefit from this automated enrichment of DMUs with functional information to speed up the preparation of FEAs of large assemblies.

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Section: Related Workmentioning

confidence: 99%

Functional restructuring of CAD models for FEA purposes

Shawan

Léon

Foucault

et al. 2015

Engineering Computations

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“…For the "Drum" model in Fig. 6, note that face extension or contraction methods used in previous work, for example in [4], are unable to obtain the simplified top (highlighted in yellow in Fig. 6a) and will fail to repair the model.…”

Section: Implementation and Analysismentioning

confidence: 99%

“…To avoid the complex surface intersection calculation involved frequently in previous works [4], a simple loop decomposition technique is developed where each complex boundary loop of the region to be suppressed is decomposed into several simple co-surface loops. The co-defined edges is a pair of edges with the same underlying curve, which likely depicts the main shape of the original model, and is a good hint of repairing models.…”

Section: Decomposition Of Boundary Loopmentioning

confidence: 99%

“…In the B-rep oriented simplification methods [4], [5], a Brep model is usually simplified by eliminating unnecessary features directly. These methods are all based on extension and contraction of neighboring faces, and have a common assumption that the face extension/contraction suffices for patching models without requiring additional faces.…”

Section: Introductionmentioning

confidence: 99%

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An efficient region suppression algorithm for B-rep model

Sun

Gao

Zhao

2009

2009 11th IEEE International Conference on Computer-Aided Design and Computer Graphics

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This paper presents a simplification method for B-rep (Boundary Representation) models through region suppression. It suppresses every complex unwanted region of a B-rep model as a whole so as to effectively and efficiently generate a simplified version of the original model that preserves the rough shape. In this method, the new surfaces that are used to cover each suppressed region are constructed based on the decomposition of the boundary loops of the suppressed region, rather than through the time-consuming face extension and intersection operations widely adopted by previous works. The experimental and evaluation results are given to show the efficiency and robustness of the method.

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“…Other approaches consist of adapting CAD models directly. For example, feature recognition and extraction processes can be intended to simplify details like fillets and blends [21][22], bosses, pockets [23] and holes. Some of these approaches generate tree-structured simplified models, where each simplification is identified as a feature.…”

Section: Introductionmentioning

confidence: 99%

Generalizing the advancing front method to composite surfaces in the context of meshing constraints topology

Foucault

Cuillière

Vincent

et al. 2013

Computer-Aided Design

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International audienceBeing 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

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Reconstruction of feature volumes and feature suppression

Cited by 6 publications

References 0 publications

Functional restructuring of CAD models for FEA purposes

Functional restructuring of CAD models for FEA purposes

An efficient region suppression algorithm for B-rep model

Generalizing the advancing front method to composite surfaces in the context of meshing constraints topology

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