Değişken kalınlıklı tüplerin enerji sönümleme davranışlarının sayısal incelenmesi

Bu çalışmada; alüminyum alaşımı AA6063’den yapılmış farklı koniklik açısı (0°, 5° ve 10°) ve ekseneldoğrultuda farklı kalınlığa (0,5 mm - 4 mm) sahip bölgelerden oluşmuş değişken kalınlıklı tüplerin (DKT)enerji sönümleme davranışları sayısal olarak incelenmiştir. Analizler sonucunda tüplerin deformasyonşekilleri, kuvvet-yer değiştirme ve enerji-zaman grafikleri elde edilmiştir. Farklı koniklik açıları için endüşük pik kuvvet ve en yüksek özgül enerji sönümleme (ÖES) değerlerini sağlayan optimum bölgekalınlıkları, İleri Beslemeli Yapay Sinir Ağları (İBYSA) tekniğini içeren optimizasyon yöntemi ilebelirlenmiştir. Optimizasyon sonucunda elde edilen katman kalınlıklarının DKT’nin enerji sönümlemedavranışını iyileştirdiği görülmüştür.

Numerical investigation of energy absorption behaviors of variable thickness tubes

In this study; the energy absorption behaviors of variable thickness tube (VTT) made of aluminum alloy AA6063 which has different thickness (0.5 mm - 4 mm) layers in axial direction and different taper angles (0°, 5° and 10°) were numerically investigated. As a result of analysis deformations pattern, forcedisplacement and energy-time graphs of the tubes were obtained. Optimum layer thicknesses which provide the lowest peak force and the highest specific energy absorbing (SEA) values for different taper angles, were determined by the optimization method which includes Feedforward Artificial Neural Networks (FNN) technique. The layer thicknesses obtained as a result of optimization showed that the energy absorption behavior of the VTT was improved.

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