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

Yıl 2018, Cilt: 21 Sayı: 4, 951 - 960, 01.12.2018

Murat Aydın Emre Acar

https://doi.org/10.2339/politeknik.385490

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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