EFFECT OF HEAT TREATMENT AND CROSS SECTION ON THE CRASHWORTHINESS OF 51CRV4 SPRING STEEL

Yıl 2019, Cilt: 24 Sayı: 2, 477 - 488, 30.08.2019

Çiğdem Dindar Hüseyin Beytüt Selçuk Karagöz

https://doi.org/10.17482/uumfd.477569

Cited By: 3

Öz

In this study,
the 51CrV4 spring steel was used as crash box material and its crashworthiness
was investigated. Crash boxes with cylinder and rectangular geometries were
designed in SolidWorks and nonlinear finite-element analysis was performed in
HyperWorks software. In addition, 51CrV4 spring steel was subjected to three
different heat treatments and their mechanical properties were determined by
tensile and hardness tests. The crashworthiness of structure was evaluated
taking into account the total energy absorbed, peak force and the specific
energy absorbed. It has been observed that heat treatment and geometric changes
have a serious impact on crashworthiness.

Anahtar Kelimeler

Thin-Walled Tubes, Crashworthiness, Mechanical Strength, Crash Box

51CrV4 Yay Çeliğinde Isıl Işlem ve Kesit Geometrisinin Çarpışma Dayanıklılığı Üzerine Etkisi

Öz

Bu çalışmada, 51CrV4 yay
çeliği çarpışma kutusu malzemesi olarak kullanılmış ve çarpışma dayanıklılığı
araştırılmıştır. Kare ve silindir kesit geometrisine sahip çarpışma kutuları
SolidWorks programında tasarlanmış olup lineer olmayan sonlu elemanlar analizi
ise HyperWorks yazılımında gerçekleştirilmiştir. Buna ek olarak, 51CrV4 çelik
malzemesi 3 farklı ısıl işleme maruz bırakılarak mekanik özellikleri çekme ve
sertlik testleri ile belirlenmiştir. Belirlenen mekanik özelliklere sahip
yapının çarpışma dayanıklılığı, emilen özgül enerji, maksimum çarpışma kuvveti
ve emilen toplam enerji hesaba katılarak değerlendirilmiştir. Isıl işlem
uygulamasının ve kesit geometrisinin çarpışma dayanıklılığı üzerinde ciddi bir
etkisi olduğu gözlemlenmiştir.

Anahtar Kelimeler

Ince-Cidarlı Tüpler, Çarpışma Dayanıklılığı, Mekanik Dayanım, Çarpışma Kutusu

Kaynakça

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