Crush Performance Comparison of FEE340 and DP600 Materials as Front Collision Rail in Automobiles

Yıl 2019, , 415 - 428, 30.04.2019

Fahri Bilbay , Murat Reis Betül Gülçimen Çakan , Mustafa Çakır

https://doi.org/10.17482/uumfd.492461

Cited By: 1

Öz

    In this study,
a frontal collision scenario (rigid wall test) is simulated in a computer
environment using a half vehicle model for two different sheets of steel that
are frequently used in automotive industry. The effects of materials, namely
FEE340 steels in HSLA (High-Strength Low Allow) family and DP600 steels in DP
(Dual Phase) family compared as front collision rails on crash performance of a
vehicle. Front bumper cross member, crash box and collision rail in the model
were designed using Siemens NX software. The pre-processing stage of collision
elements before the dynamic analysis was carried out using Altair Hypermesh
software. Abaqus software was used to create the dynamic analysis scenario of
the model and to solve the analysis. The amount of energy absorption by each
element, the total displacement, the level of the load transferred to the
passenger compartment and the crush force efficiency (CFE) results were
obtained from the simulations. According to the simulations results, although
the CFE coefficients of FEE340 and DP600 materials are close, when the FEE340
material was used, the force transferred to the passenger compartment was 32%
less, and the total displacement was 11% higher.

Anahtar Kelimeler

Crush analysis, finite element method, front collision rail, FEE340, DP600

OTOMOBİLLERDE ÖN ÇARPIŞMA KOLU MALZEMESİ OLARAK FEE340 VE DP600 MALZEMELERİN ÇARPIŞMA PERFORMANSLARININ KARŞILAŞTIRILMASI

Öz

    Bu çalışmada, otomotiv
endüstrisinde çok sık kullanılan iki farklı çelik malzeme için yarım araç modeli
kullanılarak önden çarpışma senaryosu (rijit duvar testi) bilgisayar ortamında
simule edilmiştir. Ön çarpışma kollarında kullanılan HSLA (High-Strength
Low-Alloy) çelik ailesi grubundaki FEE340 ve DP (Dual Phase) çelik ailesi
grubundaki DP600 malzemelerinin aracın çarpışma performansına olan etkileri
karşılaştırılmıştır. Modeldeki ön tampon traversi, çarpışma kutusu ve çarpışma
kolu Siemens NX yazılımı kullanılarak tasarlanmıştır. Tasarlanan çarpışma
elemanlarının ön işleme prosesi, Altair Hypermesh yazılımı kullanılarak
yapılmış ve dinamik analize hazır hale getirilmiştir. Modelin dinamik analiz
senaryosunu oluşturmak ve analizin çözümü için Abaqus yazılımı kullanılmıştır. Simülasyonlardan,
her bir eleman tarafından sönümlenen enerji miktarı, oluşan toplam deplasman,
yolcu kabinine iletilen yük miktarı ve çarpışma kuvveti verimliliği (CFE)
sonuçları elde edilmiştir. Bu veriler baz alınarak malzemelerin aracın çarpışma
performansına etkileri değerlendirilmiş ve sonuç olarak FEE340 ve DP600
malzemelerinin CFE katsayıları yakın çıkmasına karşın FEE340 malzemesinin yolcu
kabinine ilettiği kuvvetin %32 daha az, oluşturduğu deplasmanın %11 daha fazla
olduğu görülmüştür.

Anahtar Kelimeler

çarpışma analizi, sonlu elemanlar, ön çarpışma kolu, FEE340, DP600

Kaynakça

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