Fahri Berk BİLBAY, Betül GÜLÇİMEN ÇAKAN, Cihat ENSARİOĞLU, Mustafa Cemal ÇAKIR

TAŞITLARDA YÜKSEK MUKAVEMETLİ DÜŞÜK ALAŞIMLI (HSLA) ÇELİK ÖN ÇARPIŞMA KOLLARI İÇİN EN UYGUN ET KALINLIĞININ BELİRLENMESİ

Bu çalışmada, rijit duvar testi sanal ortamda simule edilerek yüksek mukavemetli düşük alaşımlı çelik ön çarpışma kolu et kalınlığının aracın çarpışma performansına etkisi incelenmiş ve en uygun et kalınlığı tespit edilmiştir. Ön çarpışma kollarında HSLA (High-Strength Low-Alloy) çelik grubundaki FEE340 malzemesi kullanılmış ve altı farklı et kalınlığının aracın çarpışma performansına etkileri karşılaştırılmıştır. Simülasyonlarda çarpışma kolu, çarpışma kutusu ve ön tampon (destek) traversinden oluşan yarım araç modeli kullanılmıştır. Farklı kalınlığa sahip ön çarpışma kollarının çarpışma analizleri Abaqus sonlu elemanlar yazılımı ile gerçekleştirilmiştir. Simülasyonlardan, toplam deplasman, çarpışma kuvveti verimliliği (CFE), yolcu kabinine iletilen kuvvet miktarı ve her bir çarpışma elemanı tarafından sönümlenen enerji miktarı sonuçları elde edilmiştir. Simülasyonda kullanılan taşıt modeli için, yolcu kabinine iletilen kuvvet, ivme ve deplasman miktarları değerlendirildiğinde HSLA çelik ön çarpışma kolu için en uygun et kalınlığının 2 mm olduğu görülmüştür.

Anahtar Kelimeler:

çarpışma analizi, sonlu elemanlar, ön çarpışma kolu, HSLA, et kalınlığı

Determinatıon of Best Wall Thickness for High Strenght Low Alloy (HSLA) Steel Front Collision Railsin Vehicles

In this study, the rigid wall test was simulated in a virtual environment and the effect of high strength low alloy steel front collision rail wall thickness on the crash performance of a vehicle was investigated and the best wall thickness was determined for the front collision rails. The FEE340 material in the HSLA (High-Strength Low-Alloy) steel group was used in the front collision rails and the effects of the six different material wall thicknesses used in the front collision rails were compared with regard to the crash performance of the vehicle. The crash analyses of the frontal collision rails with various thicknesses were performed by the Abaqus finite element software. Total displacement, crush force efficiency (CFE), the amount of force delivered to the passenger compartment and the amount of energy damped by each collision member results were acquired from the simulations. For the vehicle model used in the simulations, when the amounts of force delivered to the passenger life cage, acceleration and displacement were evaluated, it was seen that the best wall thickness for the HSLA steel front collision rail was 2 mm.

Keywords:

Crash analysis, finite element method, front collision rail, HSLA, wall thickness,

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