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Aspects of automatic CAD model pre-processing and access in mesh generation

: Mezentsev, A.A.; Woehler, T.

Mastorakis, N.E.:
System and control: theory and applications
World Scientific and Engineering Academy and Society, 2000
ISBN: 960-805211-4
World Multiconference on Circuits, Systems, Communications and Computers <4, 2000, Vouliagmeni>
Fraunhofer IPK ()

This paper addresses the problem of CAD geometric model pre-processing, also known as CAD repair and the problems of the CAD model accessibility by downstream applications. Methods, invariant from the specific software implementation and algorithms of the CAD repair for Finite Element type applications are given. Problems of the CAD model direct and indirect interfaces to applications, based on the global continuity of the object's boundary are addressed as well. The concept of full restoration of CAD model topology and direct access to the underlying geometric modeler during mesh generation is presented in detail. Examples of the prototype CAD pre-processing module and direct mesh interface to ACIS (Spatial Inc.) geometric engine are given.