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 ; |
|