Alüminyum levhaların yüksek hızlı çarpma davranışları için ampirik bir model

Alüminyum alaşımı levhalar düşük yoğunluk, yüksek yapısal mukavemet ve enerji emiş kapasitesi özellikleri nedeniyle uçak yapıları, gemi, bina ve köprü gibi çok çeşitli uygulamaların yanında hafif korunma sistemlerinde de sıklıkla kullanılmaktadır. Yüksek hızlı çarpma yükleri altındaki malzeme davranışı konusundaki bu geniş uygulama alanı, çarpma sonrasında oluşacak hasarın ve delinme miktarının belirlenmesi konusunda geliştirilecek analitik modellerin önemini artırmaktadır. Bu çalışmada, 4.80 mm ve 6.35 mm kalınlığında hazırlanan T351 ısıl durumundaki 2024 alaşımı alüminyum levhaların delinme miktarlarının belirlenmesinde kullanılabilecek üstel bir ifade önerilmiştir. Sonuçlar, önceki çalışmalarda 9 mm çapında MKEK yapımı Parabellum mermiler kullanılarak elde edilen deneysel çalışma sonuçları ile karşılaştırılmış, önerilen ifadenin AA 2024 T351 alaşımı levhaların yüksek hızlı çarpma yüklemesi durumundaki delinme miktarını, deneylerde belirtilen hızlar civarında güçlü bir şekilde temsil edebileceği belirlenmiştir.

An Empirical model for high velocity impact behavior of aluminum plates

Due to their low density, high structural strength and energy absorption capacity, aluminum alloys are frequently used in lightweight armor systems such as aeronautics applications, offshore platforms, ship components, bridge decks, etc. This wide application area considering behavior of materials subjected to high velocity impact load increases the importance of the investigations about developing analytical solutions to determine the failure mechanisms and penetration depth caused by high velocity impact. In this study, an exponential equation was proposed that can be used to determine the penetration depth of the 2024 aluminum alloys of T351 condition. Comparing the analytical results with the results of previous experimental study which used the 9 mm Parabellum bullets, it was determined that equation proposed efficiently model the penetration depth of the AA 2024 T351 plates under impact load at velocity level in experiments.

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