Development of Joining Methods of Thermoplastic Composites for Aerospace Applications

Öz

Fiber-reinforced thermoplastic matrix composite laminates pose great potential for current and future aircraft components. Thermoplastic composites' recyclability, long shelf life, resistance to environmental conditions, and high toughness properties are rapidly increasing their application areas. In addition, its environmental hazardous is much lower compared to thermosets. Thermoplastic composites have gained an important position in aviation due to these properties. In this study, some joining methods that can be used for a thermoplastic matrix composite aircraft structure have been experimentally examined. The methods were compared by performing a single lap shear test (ASTM D5868) at the coupon level. In addition, details about a novel ultrasonic welding machine that performs the welded joining method are also given. Results show that the joint strength of thermoplastic composites can be tailored by the chosen method and corresponding parameters.

Anahtar Kelimeler

• Composites
• Thermoplastic composites
• Joining methods
• Adhesive bonding
• Ultrasonic welding
• Consolidation

Havacılık Uygulamaları için Termoplastik Kompozitlerin Birleştirme Yöntemlerinin Geliştirilmesi

Öz

Fiber takviyeli termoplastik matrisli kompozit laminatlar, mevcut ve gelecekteki uçak bileşenleri için büyük bir potansiyel oluşturmaktadır. Termoplastik kompozitlerin, geri dönüştürülebilir olması, raf ömürlerinin uzunluğu, çevresel koşullara dayanımı, yüksek tokluk özellikleri uygulama alanlarını hızla arttırmaktadır. Ayrıca termosetlere göre çevreye verdiği zarar oldukça düşüktür. Termoplastik kompozitler bu özelliklerinden dolayı havacılıkta önemli bir konuma gelmiştir. Bu çalışmada, termoplastik matrisli kompozit bir hava aracı yapısalı için kullanılabilecek bazı birleştirme yöntemleri deneysel olarak incelenmiştir. Yöntemler, kupon seviyesinde tek bindirmeli kayma testi (ASTM D5868) yapılarak karşılaştırılmıştır. Ayrıca kaynaklı birleştirme yöntemini gerçekleştiren ultrasonik kaynak makinesine ilişkin detaylar da verilmiştir. Sonuçlar, termoplastik kompozitlerin bağlantı mukavemetinin seçilen yönteme ve karşılık gelen parametrelere göre ayarlanabileceğini göstermektedir.

Anahtar Kelimeler

• Kompozitler
• Termoplastik kompozitler
• Birleştirme yöntemleri
• Yapışkan bağlama
• Ultrasonik kaynak
• Konsolidasyon

Kaynakça

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