Farklı Geometrik Yapılardaki Çarpışma Kutularının İçerisine Yerleştirilen Alüminyum Köpük Malzemenin Enerji Sönümleme Kapasitesi Üzerine Etkisinin İncelenmesi

Altın, Murat; Yücesu, H. Serdar

doi:10.2339/politeknik.426642

Journal of Polytechnic

2018

DOI: 10.2339/politeknik.426642

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Farklı Geometrik Yapılardaki Çarpışma Kutularının İçerisine Yerleştirilen Alüminyum Köpük Malzemenin Enerji Sönümleme Kapasitesi Üzerine Etkisinin İncelenmesi

Murat Altın¹,

H. Serdar Yücesu²

Abstract: Farklı geometrik yapılardaki çarpışma kutularının içerisine yerleştirilen alüminyum köpük malzemenin enerji sönümleme kapasitesi üzerine etkisinin incelenmesi The effect of aluminum foam material on the energy absorption capacity of different geometric structure crash boxes Yazar(lar)

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2024

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Cited by 3 publications

References 24 publications

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Impact performance of unconventional trigger holes

Turan,

Ensarioglu,

Bakirci

et al. 2024

Materials Testing

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Crash boxes in vehicles are one of the passive safety measures that aim to reduce injury to passengers and damage to the vehicle during a collision. Their function is to absorb the mechanical energy resulting from a collision by deforming plastically. Considering human safety, not only the energy must be damped, but also the forces acting on the passengers must be controlled. This force control can be adjusted to some extent using trigger mechanisms. There is a wide variety of research on hole type triggers, but they concentrated on traditional shapes; unique or hybrid shapes have not been sufficiently tested. This study examined the effects of various hole profiles with equal areas on dynamic mechanical performances of Al 6063-T6 rectangular crash boxes. Four types of trigger shapes were formed: upward keyhole, downward keyhole, U-shaped, and S-shaped. The dynamic performance evaluation was carried out experimentally by testing five types of geometries, the fifth one being the geometry without any trigger. In addition, dynamic Finite element analyses were conducted and validated using the experimental data, with the aim of employing the Finite element models in future geometry improvement studies. The experimental results were interpreted with some common evaluation parameters: peak force, crash force efficiency, mean crash force, and total energy absorption. The downward keyhole profile generally gave the best results, while the lowest peak force was observed in the U-shaped profile.

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Impact performance of unconventional trigger holes

Turan,

Ensarioglu,

Bakirci

et al. 2024

Materials Testing

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Energy Absorption Analysis of Circular Cross-Section Crashworthiness with Dual Gradient Under Axial and Oblique Loads

Erdoğuş

2024

Journal of Polytechnic

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The tube structures designed in the multicell pattern are used for crashworthiness in many areas. In this study, the crashworthiness was designed by dividing the inner area of the circular section geometry into equal slices by examining previous studies. In addition, this structure was prepared as a dual gradient in two different sizes along the length. Performance parameters were investigated by performing theoretical and numerical analyses. For multicell crashworthiness, which is considered a dual gradient, the folding style was insufficient in lobe formation. However, the specific energy absorption (SEA) and the crushing force efficiency (CFE) values of the two types of dual gradient structures behaved appropriately in absorbing kinetic energy. The dual gradient new design of crashworthiness provides resistance by preventing the bending of the structure under oblique loading. According to the results of the analysis, the mean SEA and CFE under loading at all angles for the 2nd order dual gradient configuration was 12.88% and 1.61% higher than the 1st order design. However, with the preparation of circular section tubular structures using 8-panel elements, close values were obtained in the comparison of theoretical and numerical analysis under axial loading conditions.

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Comparison of Energy Absorptive Capacities of Different Aluminum Alloy Foams Placed Inside the Crash Box

Uslu,

Kocaoğlu

2024

MATECA

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Increasing population worldwide and the resulting increasing number of automobiles increase the risk of traffic accidents. Due to this increasing risk, automobile manufacturers take various safety measures to protect drivers and passengers in case of possible accidents. Crash boxes are one of the passive safety system elements that are the first to absorb the impact in the event of a front or rear impact accident, absorbing the resulting deformation energy and ensuring that it is transmitted into the car at the least possible level. Therefore, increasing the energy absorption ability of crash boxes is an extremely important issue. In this study, it was aimed to increase the energy absorption capabilities by placing aluminum foam based materials produced by using the powder metallurgy method using three different aluminum alloys (Al2024, Al5083, and Al6061) inside the crash boxes, which are normally manufactured as hollow. In addition, the produced aluminum foams were compared in terms of pore sizes with SEM images. It can be said that Al6061 is the most ideal material among the alloys used in terms of pore structure and homogeneity. On the other hand, Al6061 alloys produced the greatest damped energy value within the parameters of the investigation, 221.711 J. This value was 169.556 J for Al2024 alloy and 214.101 J for Al5083 alloy. As a result, it was concluded that the amount of energy absorption can be increased by about 4-5 times by using metallic foams produced using aluminum materials compared to the empty crash box.

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Farklı Geometrik Yapılardaki Çarpışma Kutularının İçerisine Yerleştirilen Alüminyum Köpük Malzemenin Enerji Sönümleme Kapasitesi Üzerine Etkisinin İncelenmesi

Cited by 3 publications

References 24 publications

Impact performance of unconventional trigger holes

Impact performance of unconventional trigger holes

Energy Absorption Analysis of Circular Cross-Section Crashworthiness with Dual Gradient Under Axial and Oblique Loads

Comparison of Energy Absorptive Capacities of Different Aluminum Alloy Foams Placed Inside the Crash Box

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