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Manley, David G. (2006) ASSEMBLY DIFFERENTIATION IN CAD SYSTEMS. Master's Thesis, University of Pittsburgh. (Unpublished)

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This work presents a data model for differentiating and sharing assembly design (AsD) information during collaborative design. Joints between parts are an important aspect of assembly models that are often ambiguous when sharing of models takes place. Although various joints may have similar geometries and topologies, their joining methods and process parameters may vary significantly. It is possible to attach notes and annotations to geometric entities within CAD environments in order to distinguish joints; however, such textual information does not readily prepare models for sharing among collaborators or downstream processes such as simulation and analysis. At present, textual information must be examined and interpreted by the human designer and cannot be interpreted or utilized by the computer; thus, making the querying of information potentially cumbersome and time consuming.This work presents an AsD ontology that explicitly represents assembly constraints, including joining constraints, and infers any remaining implicit ones. By relating concepts through ontology technology rather than just defining an arbitrary data structure, assembly and joining concepts can be captured in their entirety or extended as necessary. By using the knowledge captured by the ontology, similar-looking joints can be differentiated and the collaboration and downstream product development processes further automated, as the semantics attached to the assembly model prepares it for use within the Semantic Web.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Manley, David G.dgmst11@pitt.eduDGMST11
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairNnaji, Bart
Committee CoChairLovell, Michael
Committee MemberBidanda, Bopayabidanda@engr.pitt.eduBIDANDA
Date: 27 September 2006
Date Type: Completion
Defense Date: 8 May 2006
Approval Date: 27 September 2006
Submission Date: 16 May 2006
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Industrial Engineering
Degree: MSIE - Master of Science in Industrial Engineering
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: assembly design; CAD; ontology
Other ID:, etd-05162006-140125
Date Deposited: 10 Nov 2011 19:44
Last Modified: 15 Nov 2016 13:43


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