Kızılötesi Isıtma ile Yüksek Mekanik Özelliklere Sahip Poliamid - Sürekli Karbon Elyaf Takviyeli Termoplastik Kompozit Üretimi

Öz

Günümüzde eklemeli imalat, otomotiv, havacılık ve uzay, medikal uygulamalar vb. gibi çeşitli endüstrilerde kullanılmaktadır. Eklemeli imalat yöntemleri tasarım ve imalatta daha fazla özgürlük sunsa da genellikle düşük üretim hızı ve mekanik özelliklere sahiptir. Sürekli karbon elyaf takviyeli termoplastik kompozitler, eklemeli imalat ile üretilen parçaların mekanik özelliklerini artırmak için literatürde araştırılan yöntemlerden biridir. Bu çalışmada, poliamid ve sürekli karbon fiber kullanılarak sürekli karbon fiber takviyeli termoplastik filamentler elde etmek için eriyik emprenyene yöntemine dayalı bir üretim hattı kullanılmıştır. Baskı işleminde, katmanlar arası dayanımı geliştirerek mekanik özellikleri daha da artırmak için bir kızılötesi ısıtıcı kullanıldı. Basılan parçaların mekanik özellikleri, üç nokta eğme testleri kullanılarak ölçülmüştür. Kızılötesi ısıtıcılar ile düşük baskı hızlarında eğilme elastisite modülü ve eğilme mukavemetinde önemli bir artış gözlemlendi. Maksimum 418.99 MPa eğilme mukavemeti ve 52.15 GPa eğilme modülü değerine ulaşıldı.

Anahtar Kelimeler

• Sürekli fiber takviyeli termoplastik kompozit
• Eklemeli imalat
• Katı ergiyik yığma modelleme
• Kompozitler
• Mekanik Özellikler.

Obtaining High Mechanical Properties Polyamide - Continuous Carbon Fiber Reinforced Thermoplastic Composites with Infrared Heating

Abstract

Nowadays, additive manufacturing is being used in various industries such as automotive, aviation and space, medical applications, etc. Although additive manufacturing methods offer more freedom in design and manufacturing, they usually have low production speed and mechanical properties. Continuous carbon fiber reinforced thermoplastic (CFRTP) composites are one of the investigated methods in the literature to increase the mechanical properties of the additively manufactured parts. This study utilized a production line based upon the melt impregnation method to obtain continuous carbon fiber reinforced thermoplastic filaments using polyamide and continuous carbon fibers. In the printing process, an infrared heat source was utilized to further increase the mechanical properties by improving the interlaminar bonding. The mechanical properties of the printed parts were measured using three-point bending tests. A significant increase was observed in flexural modulus of elasticity and flexural strength with infrared heaters at low printing speeds. A maximum value of 418.99 MPa flexural strength and 52.15 GPa flexural modulus was achieved.

Keywords

• Continuous fiber-reinforced thermoplastic composites (CFRTP)
• Additive manufacturing
• Fused Deposition Modeling (FDM)
• Composites
• Mechanical Properties.

Kaynakça

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