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Vasilakis G.,Center for Research and Technology Thessaly | Garcia-Rojas A.,Ecole Polytechnique Federale de Lausanne | Papaleo L.,University of Genoa | Catalano C.E.,Institute for Applied Mathematics and Information Technologies | And 4 more authors.
International Journal of Software Engineering and Knowledge Engineering | Year: 2010

In recent years, 3D media have become more and more widespread and have been made available in numerous online repositories. A systematic and formal approach for representing and organizing shape-related information is needed to share 3D media, to communicate the knowledge associated to shape modeling processes and to facilitate its reuse in useful cross-domain usage scenarios. In this paper we present an initial attempt to formalize an ontology for digital shapes, called the Common Shape Ontology (CSO). We discuss about the rationale, the requirements and the scope of this ontology, we present in detail its structure and describe the most relevant choices related to its development. Finally, we show how the CSO conceptualization is used in domain-specific application scenarios. © 2010 World Scientific Publishing Company.

Hamri O.,University of Abderrahmane Mira de Béjaïa | Leon J.C.,Grenoble Institute of Technology | Giannini F.,Institute for Applied Mathematics and Information Technologies | Falcidieno B.,Institute for Applied Mathematics and Information Technologies
Strojniski Vestnik/Journal of Mechanical Engineering | Year: 2010

Computer Aided Design (CAD) and Computer Aided Engineering (CAE) are two significantly different disciplines, and hence they require different shape models representations. As a result, models generated by CAD systems are often unsuitable for Finite Element Analysis (FEA) needs. In this paper, a new approach is proposed to reduce the gaps between CAD and CAE software's. It is based on new shape representation called mixed shape representation. The latter simultaneously supports the B-Rep (manifold and non-manifold) and polyhedral representation, and creates a robust link between the CAD model (B-Rep NURBS) and the polyhedral model. Both representations are maintained on the same topology support called the High Level Topology (HLT), which represents a common requirement for simulation model preparation. An innovative approach for the Finite element simulation model preparation based on the mixed representation is presented in this paper, thus a set of necessary tools is associated to the mixed shape representation. They help to reduce the time of model preparation process as much as possible and maintain the consistency between the CAD and simulation models. © 2010 Journal of Mechanical Engineering.

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