Computer Aided Design and Finite Element Simulation Consistency

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.

[1]  Willem F. Bronsvoort,et al.  Multiple-way feature conversion to support concurrent engineering , 1995, SMA '95.

[2]  Lionel Fine.  Processus et méthodes d'adaptation et d'idéalisation de modèles dédiés à l'analyse de structures mécaniques , 2001 .

[3]  Scott A. Canann,et al.  An Object Oriented Approach to Geometry Defeaturing for Finite Element Meshing , 1998, IMR.

[4]  Jim Ruppert,et al.  A Delaunay Refinement Algorithm for Quality 2-Dimensional Mesh Generation , 1995, J. Algorithms.

[5]  Franca Giannini,et al.  Using CAD Models and Their Semantics to Prepare F.E. Simulations , 2005 .

[6]  S. Sheppard,et al.  Using Features to Support Finite Element Idealizations , 1994 .

[7]  Franca Giannini,et al.  From CAD Models to F.E. Simulations Through a Feature-Based Approach , 2004 .

[8]  David R. White,et al.  The Meshing Complexity of a Solid: An Introduction , 2001, IMR.

[9]  Abdelaziz Bouras,et al.  Morphological analysis for product design , 2000, Comput. Aided Des..

[10]  Jean-Claude Léon,et al.  Interoperability between CAD and Simulation Models for Cooperative Design , 2004 .

[11]  Timothy J. Tautges,et al.  Feature based hex meshing methodology: feature recognition and volume decomposition , 2001, Comput. Aided Des..

[12]  Franca Giannini,et al.  Interfacing product views through a mixed shape representation. Part 1: Data structures and operators , 2008 .

[13]  Jean-Claude Léon,et al.  Using Polyhedral Models to Automatically Sketch Idealized Geometry for Structural Analysis , 2001, Engineering with Computers.

[14]  Marian Gheorghe,et al.  Product Family Modelling in Conceptual Design Based on Parallel Configuration Grammars , 2008 .

[15]  Jami J. Shah,et al.  Parametric and Feature-Based CAD/CAM: Concepts, Techniques, and Applications , 1995 .

[16]  Joe Walsh,et al.  Accessing CAD Geometry for Mesh Generation , 2003, IMR.

[17]  Okba Hamri.  Method, models and tools for finite element model preparation integrated into a product development process , 2006 .

[18]  Robert M. O'Bara,et al.  Attribute Management System for Engineering Analysis , 2002, Engineering with Computers.

[19]  Willem F. Bronsvoort,et al.  Multiple-view feature modelling for integral product development , 2004, Comput. Aided Des..

[20]  L. Remondini,et al.  Automated generation of FEA models through idealization operators , 2000 .

[21]  Subodh Kumar,et al.  RSVP: A Geometric Toolkit for Controlled Repair of Solid Models , 1998, IEEE Trans. Vis. Comput. Graph..