Düzlemsel Olmayan Çatlak İlerleme Problemlerinin Üç Boyutlu Analizi

Oğuzhan Demir; Ali Osman Ayhan

Düzlemsel Olmayan Çatlak İlerleme Problemlerinin Üç Boyutlu Analizi

Öz

Enerji, Savunma, Havacılık ve Uzay teknolojileri, ülkeler için kritik öneme sahip olup, bilim ve teknoloji düzeyinin gelişmesinde öncü rol oynayan alanların başında gelmektedir. Ar-Ge ve
yatırım maliyetlerinin yüksek olduğu bu alanlarda, kullanılan ekipmanlar da hem mali açıdan hem de malzeme güvenilirliği açısından büyük önem kazanmaktadır. Malzemelerde oluşabilecek hasarları en aza indirebilmek ve çatlak içeren yapıların emniyetli çalışabilmesini sağlamak için son yıllarda kırılma mekaniği alanında yapılan çalışmalar ağırlık kazanmıştır. Tasarım aşamasından başlayarak hasar/çatlak toleransları ve ömürleri tahmin edilerek iyileştirme çalışmaları gerçekleştirilmektedir.
Bu çalışmada, çatlaklı yapıların mod-I kırılma tokluğunu (KIC) belirlemede kullanılan standart CT (compact tension) numunesine eğik çatlak yerleştirilerek mod-I dış yüklemesi altında çatlağın üç boyutlu modelleme ve çatlak ilerleme simülasyonları gerçekleştirilmiştir. Kırılma ve çatlak ilerleme analizleri FCPAS (Fracture and Crack Propagation Analysis System) programı ile gerçekleştirilmiştir. Bu çalışma, FCPAS ile üç boyutlu karışık modlu çatlak ilerleme olgusunun modellenmesinin ilk adımını oluşturmaktadır.

Anahtar Kelimeler

Sonlu Elemanlar Yöntemi,Çatlak İlerleme Analizi,Karışık Mod-I/III,Düzlemsel Olmayan Çatlak İlerlemesi

Destekleyen Kurum

Türkiye Bilimsel ve Teknolojik Araştırma Kurumu’na (TÜBİTAK)

Proje Numarası

113M407

Teşekkür

Bu çalışmayı, 113M407 no.lu proje kapsamında finansal olarak destekleyen, Türkiye Bilimsel ve Teknolojik Araştırma Kurumu’na (TÜBİTAK) teşekkür ederiz.

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Ayrıntılar

Birincil Dil

Türkçe

Konular

Mühendislik

Bölüm

Araştırma Makalesi

Yazarlar

Oğuzhan Demir

Ali Osman Ayhan ^*

Yayımlanma Tarihi

25 Haziran 2017

Gönderilme Tarihi

22 Haziran 2016

Kabul Tarihi

22 Şubat 2017

Yayımlandığı Sayı

Yıl 2017 Cilt: 5 Sayı: 2

IZ

https://izlik.org/JA98JC79GP

Kaynak Göster

RIS / Bibtex

APA

Demir, O., & Ayhan, A. O. (2017). Düzlemsel Olmayan Çatlak İlerleme Problemlerinin Üç Boyutlu Analizi. Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji, 5(2), 159-175. https://izlik.org/JA98JC79GP