Designing with parametric CAD: Classification and comparison of construction techniques

Jami J. Shah

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Scopus citations

Abstract

This paper gives an overview of the rapid evolution of parametrics, from somewhat slow beginnings in academic labs to mainstream commercial CAD. Although not recognized by the user community, parametric CAD is not a single technique but a set of techniques, each with its own advantages and limitations. Each is supported by different technologies. Most CAD systems allow one to mix and match different parametric approaches for creating part geometry. One objective of this article is to establish a clear terminology of parametric paradigms. An enumeration of parametric capabilities for model creation in current commercial CAD systems is reviewed. The influence of model history and constraint solving techniques on parametric modeling is also examined. Limitations exist in feature validation, unexpected model behavior due to topology changes, and solving coupled constraints at full 3D variational level. The idea of "assembly features" has not yet been exploited in commercial CAD. The discussion in this paper is a generalization of parametric capabilities of commercial systems; prototypes in academic research labs are not discussed.

Original languageEnglish (US)
Title of host publicationGeometric Modelling
Subtitle of host publicationTheoretical and Computational Basis towards Advanced CAD Applications - IFIP TC5/WG5.2 6th International Workshop on Geometric Modelling
PublisherSpringer New York LLC
Pages53-68
Number of pages16
ISBN (Print)9781475753226
DOIs
StatePublished - 2001
EventIFIP TC5/WG5.2 6th International Workshop on Geometric Modelling - Tokyo, Japan
Duration: Dec 7 1998Dec 9 1998

Publication series

NameIFIP Advances in Information and Communication Technology
Volume75
ISSN (Print)1868-4238

Other

OtherIFIP TC5/WG5.2 6th International Workshop on Geometric Modelling
CountryJapan
CityTokyo
Period12/7/9812/9/98

Keywords

  • CAD
  • Geometric constraints
  • Parametrics

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications
  • Information Systems and Management

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