Cıvata bağlantılı tabakalı kompozit levhalarda hasar analizi

Yıl 2020, Cilt: 26 Sayı: 4, 613 - 619, 20.08.2020

Tolga Dursun Mahmut Özbay

Öz

Bu çalışmada, cıvata bağlantılı tabakalı kompozit levhalarda çekme mukavemetini yüksek hassasiyette belirleyebilmek amacıyla kademeli hasar ilerleme modeli kullanılarak hasar analizi uygulanmıştır. Hasar ilerleme modeli ANSYS APDL kullanılarak hazırlanmıştır. Hashin hasar kriterleri kullanılarak sonlu elemanlar analizleri gerçekleştirilmiştir. Çalışmanın sonuçları deneysel çalışma sonuçları ile kıyaslanmış ve oldukça benzer sonuçlara ulaşılmıştır. Ayrıca levha genişliği/delik çapı oranı (W/D) 2’den 4’e kadar, kenar uzaklığı/delik çapı oranı (E/D) ise 1’den 4’e kadar değiştirilerek geometrik etkilerin kompozit yapının yük taşıma kapasitesine etkisi araştırılmış ve maksimum çekme dayanımları hesaplanmıştır. W/D ve E/D oranları 2 için hasar levhanın serbest kenarına doğru kayma (yırtılma) şeklinde ilerlemiştir. W/D ve E/D oranları 2’den büyük olduğunda hasar ezilme (yatak hasarı) şeklinde gerçekleşmiştir. [02/902]s konfigürasyonuna sahip kompozit levhada net çekme hasarı meydana gelmemiştir. W/D ve E/D oranları 3 olduğunda kompozit levha maksimum yatak (ezilme) mukavemetine ulaşmaktadır.

Anahtar Kelimeler

Hasar ilerleme algoritması, Kompozit, Sonlu elemanlar yöntemi

Kaynakça

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