MURAT ALTIN

Çarpışma Kutularının Üzerine Açılan Oyukların Çarpışma Performansı Üzerine Etkisinin İncelenmesi

Pasif güvenlik sistemi elemanlarından birisi olan çarpışma kutuları olası bir kaza durumunda hasarın minimum seviyede oluşmasını sağlamak amacıyla kullanılmaktadır. Yapılan bu çalışmada çarpışma kutusunun üzerine açılan oyukların çarpışma performansı üzerine etkisi sonlu elemanlar yöntemi kullanılarak incelenmiştir. Çalışmada farklı oyuk genişliklerine sahip çarpışma kutusu tasarımları gerçekleştirilmiştir. Oyukların genişlikleri 1 mm, 2 mm, 3 mm, 4 mm ve 5 mm olarak belirlenmiş ve çarpışma kutularının üzerine farklı sayıda açılmıştır. Her bir çarpışma kutusunun et kalınlığı 2 mm olarak alınmıştır. Tasarımları gerçekleştirilen çarpışma kutuları Hypermesh programı ile sonlu elemanlarına ayrılmış, Ls-PrePost programı ile malzeme kartları, kontaklar ve sınır şartları gibi özelliklerin belirlenmiş ve Ls-Dyna ile dinamik analizleri gerçekleştirilmiştir. Yapılan analizler sonucunda çarpışma kutularının üzerine oyuk açmanın çarpışma performansı üzerinde olumlu etki gösterdiği tespit edilmiştir.

Anahtar Kelimeler:

Çarpışma kutusu, sonlu elemanlar analizi, çarpışma performansı

Investigation of the Effect of Corrugated On Crash Performance In Crash Boxes

Crash boxes, one of the components of passive safety systems, will ensure that damage is minimized in the event of an accident. In this study, the impact on the crash performance of the corrugated on the crash box was investigated using the finite element method. Crash box designs with different corrugate widths were modeled. The widths of the corugate were determined as 1 mm, 2 mm, 3 mm, 4 mm and 5 mm, and were opened at different numbers on the crash boxes. The wall thickness of each crash box is taken as 2 mm. Designed crash boxes are divided into finite elements with Hypermesh program, Ls-PrePost program has been used to determine material cards, properties such as contacts and boundary conditions and dynamic analyses were carried out with Ls-Dyna. As a result of the analyses made, it has been found that corrugate on crash boxes has a positive effect on crashworthiness performance.

Keywords:

Crash box, Finite element analysis, crash performance,

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