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Symbolic representation of three-dimensional objects to aid local and global shape analysis for defect prediction of casting design

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Abstract

Part descriptions of a 3-D computer-aided design model are in a form of basic geometry and topology to which manufacturing process and engineering analysis cannot be directly applied. A formalism for symbolic representation of a three-dimensional pattern model is presented to aid local and global shape analysis of casting design. Local shape analysis is carried out based on symbolic representation and global shape analysis is performed by analyzing the extracted skeleton from a discretized object.

The purpose of local shape analysis is to reason about local shape characteristics so as to alter the design to obey casting requirement. On the other hand, the purpose of global shape analysis is to locate and measure global shape characteristics, thus allowing the system to aid the decision making process in evaluating the global casting soundness. The main aim of developing an expert system for casting design is to provide the casting designer with a tool for on-line manufacturability evaluation of a part design while the functional design is being performed. This paper explains the basic concepts of the three-dimensional pattern model and describes its use for castability evaluation of casting design. An implementation of the algorithms and examples are provided.

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You, I.C., Chu, C.N. & Kashyap, R.L. Symbolic representation of three-dimensional objects to aid local and global shape analysis for defect prediction of casting design. Appl Intell 1, 99–120 (1991). https://doi.org/10.1007/BF00058877

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  • DOI: https://doi.org/10.1007/BF00058877

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