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Shape optimization of thin-walled tubes under high-velocity axial and transverse impact loadings

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dc.contributor Ph.D. Program in Mechanical Engineering.
dc.contributor.advisor Sönmez, Fazıl Önder.
dc.contributor.author Tanlak, Niyazi.
dc.date.accessioned 2023-03-16T11:19:47Z
dc.date.available 2023-03-16T11:19:47Z
dc.date.issued 2014.
dc.identifier.other ME 2014 T36 PhD
dc.identifier.uri http://digitalarchive.boun.edu.tr/handle/123456789/15206
dc.description.abstract Thin-walled tubes are one of the most commonly used parts in structural ap- plications. More specifically, they are used as passive safety measures in vehicles like bumper-beams and crash-boxes. They take loads either mainly in the axial direction or transverse direction. The objective of this study is to develop a design optimization methodology to maximize the crash-worthiness of such parts. The method is applied to obtain optimal shape designs of a bumper-beam and a crash-box. They are modeled under the loading conditions in standard EuroNCAP tests in which the vehicle hits a deformable barrier with 40% offset by 64 km/h speed. The crash event is simulated us- ing explicit finite element method. A lumped parameter model is developed to account for the structural response of the main vehicle body by a parametric system identi- fication method. The tubes are optimized by a hybrid search algorithm combining genetic algorithm and Nelder&Mead simplex search. The results indicate significant improvement in the crash-worthiness of the tubes.
dc.format.extent 30 cm.
dc.publisher Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014.
dc.subject.lcsh Thin-walled structures.
dc.title Shape optimization of thin-walled tubes under high-velocity axial and transverse impact loadings
dc.format.pages xvi, 81 leaves ;


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