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Optimum crashworthiness design of tapered thin-walled tubes with lateral circular cutouts

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dc.contributor.author Tastan, A.
dc.contributor.author Acar, Erdem
dc.contributor.author Güler, Mehmet Ali
dc.contributor.author Kilinckaya, U.
dc.date.accessioned 2019-06-26T08:07:01Z
dc.date.available 2019-06-26T08:07:01Z
dc.date.issued 2016-10
dc.identifier.citation Taştan, A., Acar, E., Güler, M. A., & Kılınçkaya, Ü. (2016). Optimum crashworthiness design of tapered thin-walled tubes with lateral circular cutouts. Thin-Walled Structures, 107, 543-553. en_US
dc.identifier.issn 0263-8231
dc.identifier.uri https://www.sciencedirect.com/science/article/pii/S0263823116304529
dc.identifier.uri http://hdl.handle.net/20.500.11851/1481
dc.description.abstract In this paper, the effects of introducing lateral circular cutouts on crash performances of tapered thin-walled tubes are explored within a simulation-driven surrogate-based multi-objective optimization framework. The crash performances of the tubes are measured using the crush force efficiency (CFE) and the specific energy absorption (SEA) criteria, which are computed using the finite element analysis code LS-DYNA. Surrogate-based optimization approach is followed to find out that optimum values of the wall thickness, the taper angle, the cutout diameter and the numbers of cutouts in horizontal and vertical directions to maximize CFE and SEA. Four different surrogate models are used: polynomial response surfaces, radial basis functions, and Kriging models with zeroth- and first-order trend models. It is found that the optimum CFE of the tubes with lateral circular cutouts is 27.4% larger than the optimum CFE of the tubes without cutouts. It is also found that the optimum SEA of the tubes with lateral circular cutouts is 26.4% larger than the optimum SEA of the tubes without cutouts. It is observed that the optimum SEA design has slightly reduced wall thickness, significantly reduced taper angle, significantly increased cutout diameter, increased number of cutouts in horizontal direction and slightly reduced number of cutouts in vertical direction compared to the optimum CFE design. In addition, multi-objective optimization of the tubes is performed by maximizing a composite objective function that provides a compromise between CFE and SEA. It is found that the CFE dominates the behavior of composite objective function. (C) 2016 Elsevier Ltd. All rights reserved. en_US
dc.description.sponsorship This study is funded by The Scientific and Research Council of Turkey (TUBITAK) under Grant MAG-115M025.
dc.language.iso eng en_US
dc.publisher Elsevier Sci Ltd en_US
dc.rights info:eu-repo/semantics/closedAccess
dc.subject Crush force efficiency en_US
dc.subject Specific energy absorption en_US
dc.subject Finite element analysis en_US
dc.subject LS-DYNA en_US
dc.subject Surrogate models en_US
dc.subject Multi-objective optimization en_US
dc.subject Circular cutouts en_US
dc.subject Thin-walled tubes en_US
dc.title Optimum crashworthiness design of tapered thin-walled tubes with lateral circular cutouts en_US
dc.type article en_US
dc.relation.journal Thin-Walled Structures en_US
dc.contributor.department TOBB ETU, Faculty of Engineering, Department of Mechanical Engineering en_US
dc.contributor.department TOBB ETÜ, Mühendislik Fakültesi, Makine Mühendisliği Bölümü tr_TR
dc.identifier.volume 107
dc.identifier.startpage 543
dc.identifier.endpage 553
dc.relation.tubitak Scientific and Research Council of Turkey (TUBITAK) [MAG-115M025] en_US
dc.contributor.orcid http://orcid.org/0000-0002-3661-5563
dc.contributor.orcid http://orcid.org/0000-0002-1159-556X
dc.identifier.wos WOS:000383813200044
dc.identifier.scopus 2-s2.0-84979609809
dc.contributor.tobbetuauthor Güler, Mehmet Ali
dc.contributor.tobbetuauthor Acar, Erdem
dc.contributor.YOKid 143688
dc.contributor.YOKid 19122
dc.identifier.doi 10.1016/j.tws.2016.07.018
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı tr_TR


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