Geometric and solid modeling: an introduction
Geometric and solid modeling: an introduction
Boundary representation deformation in parametric solid modeling
ACM Transactions on Graphics (TOG)
Representations for Rigid Solids: Theory, Methods, and Systems
ACM Computing Surveys (CSUR)
Reconstruction of feature volumes and feature suppression
Proceedings of the seventh ACM symposium on Solid modeling and applications
Removal of blends from boundary representation models
Proceedings of the seventh ACM symposium on Solid modeling and applications
Integrated feature-based and geometric CAD data exchange
SM '04 Proceedings of the ninth ACM symposium on Solid modeling and applications
Proceedings of the 2006 ACM symposium on Solid and physical modeling
A formal theory for estimating defeaturing-induced engineering analysis errors
Computer-Aided Design
Adaptation of CAD model topology for finite element analysis
Computer-Aided Design
Feature sensitivity: A generalization of topological sensitivity
Finite Elements in Analysis and Design
Transformation of a thin-walled solid model into a surface model via solid deflation
Computer-Aided Design
Feature suppression based CAD mesh model simplification
Computer-Aided Design
Estimating the effects of removing negative features on engineering analysis
Computer-Aided Design
Quantitative control of idealized analysis models of thin designs
Computers and Structures
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CAD technology plays an ever more central role in today's multidisciplinary simulation environments. While this has enabled highly complex and detailed models to be used earlier in the design process it has brought with it difficulties for simulation specialists. Most notably CAD models now contain many details which are irrelevant to simulation disciplines. CAD systems have feature trees which record feature creation but unfortunately this does not capture which features are relevant to which analysis discipline. Many features of little significance to an analysis only emerge during the construction of the model. The ability to selectively suppress and reinstate features while maintaining an audit trail of changes is required to facilitate the control of the idealisation process. Features suppressed for one analysis can be retrieved for use in another.This work uses combinatorial topology concepts to outline the necessary conditions so that CAD model simplification operations can be designed as continuous transformations. Irrelevant features can then be suppressed and subsequently reinstated, within defined limitations, independently from the order in which they were suppressed. The implementation of these concepts provides analysts with a mechanism for generating analysis models with different levels of detail, without having to repeat the simplification process from the original CAD geometry. Most importantly, the information recorded during the suppress operations forms an essential audit trail of the idealisation process and can be presented in a feature-tree like structure allowing analysts to review their modelling decisions retrospectively. The approach also facilitates the generation of local, detailed models encapsulating a feature of interest. The proposed system follows a Find and Fix paradigm; where different algorithms for feature finding and fixing can be utilised in a common cellular modelling framework.