Fonksiyonel Kademelendirilmiş Plakalarda Kalınlık Boyunca Kompozisyonel Değişimin Balistik Performans Üzerindeki Etkisinin İncelenmesi

Öz

Bu çalışmada, fonksiyonel kademelendirilmiş plakalarda kalınlık boyunca bileşenlerin hacimsel değişim sürekliliğinin, balistik performans üzerindeki etkisi sayısal olarak incelenmiştir. Sayısal analizler eksplisit dinamik analiz yapabilen LS-DYNA sonlu elemanlar yazılımı kullanılarak yapılmıştır.

Seramik (SiC) ve metal (Al) bileşenlerden oluşan fonksiyonel kademelendirilmiş plakalarımda kademelendirilmiş bölgedeki lokal malzeme özelliklerinin hesaplanmasında, mikro mekanik model olarak Mori-Tanaka şeması kullanılmıştır. Plakaların elasto plastik davranışlarının modellenmesi için de, iki farklı bileşene sahip yapılarda bileşenlerin, tek eksenli gerilme-şekil değiştirme değerlerini kullanarak kompozit malzemenin gerilme şekil değiştirme eğrisinin oluşturulması için geliştirilmiş olan TTO model kullanılmıştır. 

Anahtar Kelimeler

• Fonksiyonel kademelendirilmiş malzemeler,balistik performans

An Investigation of the Ballistic Performance of Functionally Graded Plates have Different Compositional Gradation Through the Plate Thickness

Öz

In this study, the ballistic performance of functionally graded plates (FGSPs) which have different layer numbers have been investigated numerically. Numerical analyses were performed using LS-DYNA finite element software which can perform an explicit dynamic analysis. The functionally graded sandwich plate is composed of a mixture of ceramic (SiC) and metal (Al) constituents, Mori–Tanaka scheme was used to determine the effective material properties at any point inside functionally graded plates. In order to define the elasto-plastic behavior of the functionally graded layers, the TTO (Tamura-Tomota-Ozawa) model was used.

Anahtar Kelimeler

• functionally graded materials,ballistic performance,finite element method

Kaynakça

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