Delik açılmış AA6061 kare tüplerin çarpışma performansının Taguchi yöntemi ile belirlenmesi

Öz

Bu çalışmada, kare kesitli ve yüzeyinde farklı geometrik konfigürasyonlarda delikler bulunan ince cidarlı tüplerin eksenel yük altındaki enerji sönümleme performansları sistematik olarak incelenmiştir. Deneysel tasarım kapsamında delik çapı, dairesel çoğaltma sayısı, lineer çoğaltma sayısı, delikler arası mesafe ve delik üst mesafesi olmak üzere beş temel faktör belirlenmiş ve her bir faktör dört seviyede ele alınmıştır. Faktör-seviye kombinasyonlarının minimum deney sayısı ile temsil edilebilmesi amacıyla L16 Taguchi ortogonal dizi kullanılarak deneyler gerçekleştirilmiştir. Elde edilen kuvvet-yer değiştirme eğrilerinden pik kuvvet ve sönümlenen enerji (SE) değerleri hesaplanmış ve enerji sönümleme davranışı bu yanıtlar üzerinden değerlendirilmiştir. Taguchi yöntemi ile yapılan tek yanıtlı optimizasyon analizlerinde, pik kuvvet için “daha küçük daha iyi”, SE için ise “daha büyük daha iyi” kriterleri uygulanmıştır. Analiz sonucunda pik kuvvet üzerinde en etkili faktörün dairesel çoğaltma, SE üzerinde en etkili faktörün ise delik üst mesafesi olduğu belirlenmiştir. Çok yanıtlı optimizasyon amacıyla gerçekleştirilen Gri İlişkisel Analiz (GİA) sonuçlarına göre, genel performansı en fazla etkileyen faktörün yine dairesel çoğaltma olduğu; lineer çoğaltmanın ise performansı en az etkileyen parametre olarak öne çıktığı görülmüştür. GİA sonucunda pik kuvvet değerleri %30.13 azalırken SE değeri yalnızca %1.39 azalmıştır.

Anahtar Kelimeler

• Enerji sönümleme
• Kare tüp
• Taguchi yöntemi
• Delik açma

Determining crashworthiness performance of perforated AA6061 square tubes using the Taguchi method

Öz

In this study, the energy absorption performance of thin-walled tubes with square cross-sections and holes of different geometric configurations on their surfaces under axial loading was systematically investigated. Within the experimental design, five fundamental factors were identified: hole diameter, circular pattern number, linear pattern number, inter-hole distance, and hole top distance were determined as five basic factors, and each factor was considered at four levels. Experiments were conducted using the L16 Taguchi orthogonal array to represent the factor-level combinations with a minimum number of experiments. Peak force and absorbed energy (AE) values were calculated from the obtained force-displacement curves, and the energy absorption behavior was evaluated based on these responses. In the single-response optimization analyses performed using the Taguchi method, the “smaller is better” criterion was applied for peak force and the “larger is better” criterion for AE. The analysis determined that the most influential factor on peak force was circular replication, while the most influential factor on SE was hole top distance. According to the results of the Grey Relational Analysis (GRA) performed for multi-response optimization, it was observed that the factor most affecting overall performance was again circular replication, while linear replication emerged as the parameter least affecting performance. As a result of the GRA, peak force values decreased by 30.13%, while the SE value decreased by only 1.39%.

Anahtar Kelimeler

• Energy absorption
• Square tube
• Taguchi method
• Hole drill

Kaynakça

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