Sürekli Elyaf Takviyeli Termoplastik Kompozitlere Uygulanan Isıl İşlemlerin Mekanik Özelliklere Etkisi

Year 2022, Volume 7, Issue 1, 10 - 17, 30.06.2022

Bahri Barış VATANDAŞ Recep GÜMRÜK Altuğ UŞUN Nuri YILDIZ

Abstract

Bu çalışmada, farklı ısıl işlemlerin sürekli elyaf takviyeli termoplastik (CFRTP)'ler üzerindeki etkileri araştırılmıştır. CFRTP kompoziti, eklemeli imalat yöntemlerinden biri olan kaynaşmış biriktirme modellemesi (FDM) kullanılarak üretilir. Matris olarak polilaktik asit (PLA), takviye malzemesi olarak karbon fiberler (3K) kullanılmıştır. İlk olarak, özel olarak tasarlanmış bir eriyik emdirme hattında CFRTP filamenti üretildi. Daha sonra geleneksel bir 3D yazıcı ile test örnekleri üretildi. Daha sonra üretilen numunelere ısıl işlemler (tuzda yeniden eritme, mikrodalga fırın, fırında) uygulanmış ve bu işlemlerin mekanik özelliklere etkileri araştırılmıştır. Test numunelerinin mekanik özelliklerini araştırmak için üç nokta eğilme testleri kullanılmıştır. CFRTP numunelere uygulanan ısıl işlemler sonucunda 200 ile 220 MPa arasında eğilme gerilmeleri elde edilmiştir. En yüksek eğilme gerilimi tuzda yeniden eritilerek elde edilmiştir. Isıl işlemler sonucunda gerilme değerleri benzer ancak tuz uygulamasında yeniden ergitme daha rijit bir davranış sergilemiştir.

Keywords

Sürekli Elyaf Takviyeli Termoplastik, Isı tedavisi, 3D Baskı, Kaynaşmış Biriktirme Modellemesi

The Effect of Heat Treatments Applied to Continuous Fiber Reinforced Thermoplastic Composites on Mechanical Properties

Abstract

This study investigated the effects of different heat treatments on continuous fiber-reinforced thermoplastic (CFRTP) 's. CFRTP composite is produced using fused deposition modeling (FDM), which is one of the additive manufacturing methods. Polylactic acid (PLA) was used as a matrix, and carbon fibers (3K) were utilized as reinforcement material. First, CFRTP filament was produced on a specially designed melt impregnation line. Afterward, test samples were manufactured via a conventional 3D printer. Then, heat treatments (re-melting in salt, microwave oven, oven) were applied to the produced samples, and the effects of these processes on mechanical properties were investigated. Three-point bending tests were used to investigate the mechanical properties of the test samples. As a result of the heat treatments applied to the CFRTP specimens, flexural stresses between 200 and 220 MPa was achieved. The highest bending stress was obtained by re-melting in salt. As a result of the heat treatments, the stress values are similar, but the re-melting in salt application exhibited a more rigid behavior.

Keywords

Continuous Fiber Reinforced Thermoplastic, Heat Treatment, 3D Printing, Fused Deposition Modeling

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