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International Journal of Aerospace Engineering
Volume 2014, Article ID 439278, 10 pages
http://dx.doi.org/10.1155/2014/439278
Research Article

On the Effects of Modeling As-Manufactured Geometry: Toward Digital Twin

1School of Civil and Environmental Engineering, Cornell University, 642 Rhodes Hall, Ithaca, NY 14853, USA
2NASA Langley Research Center, 188E, Hampton, VA 23681, USA
3The HDF Group, 1800 South Oak Street, Suite 203, Champaign, IL 61820, USA
4School of Civil and Environmental Engineering, Cornell University, 643 Rhodes Hall, Ithaca, NY 14853, USA

Received 23 April 2014; Revised 26 July 2014; Accepted 1 August 2014; Published 27 August 2014

Academic Editor: Christopher J. Damaren

Copyright © 2014 Albert Cerrone et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A simple, nonstandardized material test specimen, which fails along one of two different likely crack paths, is considered herein. The result of deviations in geometry on the order of tenths of a millimeter, this ambiguity in crack path motivates the consideration of as-manufactured component geometry in the design, assessment, and certification of structural systems. Herein, finite element models of as-manufactured specimens are generated and subsequently analyzed to resolve the crack-path ambiguity. The consequence and benefit of such a “personalized” methodology is the prediction of a crack path for each specimen based on its as-manufactured geometry, rather than a distribution of possible specimen geometries or nominal geometry. The consideration of as-manufactured characteristics is central to the Digital Twin concept. Therefore, this work is also intended to motivate its development.