İHA Performansını Artırmak İçin Kimyasal Maddeler Kullanarak Hafif PLA Üretimine Yönelik Yenilikçi Bir Yaklaşım

Öz

Bu çalışmada, farklı köpürme ajanı konsantrasyonları ile kompozisyonlar oluşturulmuş polilaktik asit (PLA) granülleri kullanılarak Eriyik Yığma Modelleme (Fused Deposition Modeling – FDM) için köpürebilen düşük yoğunluklu filamentlerin üretimi ve optimizasyonu yapılmıştır. 1,75 mm çapında filamentler, PLA’ya köpürme ajanın %12, %18 ve %24 oranlarında eriyik karıştırma yöntemiyle katılması ile hazırlanmıştır. Bu filamentlerden daha sonra 3B baskı ile test numuneleri üretilmiştir. Filament ekstrüzyonu ve numune baskısı sırasında, meme (nozzle) sıcaklığı ve baskı hızı dahil olmak üzere FDM proses parametreleri sistematik olarak değiştirilmiştir. Elde edilen numuneler üzerinde mekanik ve morfolojik testler gerçekleştirilmiştir. Çekme dayanımı, kopma uzaması ve Young modülü gibi mekanik özellikler değerlendirilmiştir. Ayrıca, taramalı elektron mikroskobu (SEM) analizleri, basılmış numuneler içerisindeki mikroyapı ve gözenek dağılımı hakkında bilgi sağlamıştır. Köpüren filamentlerin gözenekliliğini nicelendirmek amacıyla yoğunluk testleri yapılmıştır. Köpürme davranışının optimize edilmesiyle, mekanik performans ile azaltılmış malzeme yoğunluğu arasında bir denge sağlanması hedeflenmiştir. Elde edilen bulgular, hafif ve yapısal olarak verimli FDM uygulamaları için PLA bazlı köpürebilen filamentlerin anlaşılmasına katkı sağlamaktadır.

Anahtar Kelimeler

• polimer
• eklemeli imalat
• insansız hava aracı

Novel Approach to Lightweight PLA Manufacturing Using Chemical Agents for Enhanced UAV Performance

Öz

: In this paper, we examine the production and optimization of foamed filaments for Fused Deposition Modeling (FDM) based on mixing poly(lactic acid) (PLA) granules with different concentrations of foaming agents. The diameter of the produced filaments was set to 1.75mm. The melt mixing process of PLA and foaming agent was carried out at a ratio of 12%, 18%, and 24%. Later, we used the filaments to print objects using a 3D printer to produce test samples. The process parameters for FDM, such as nozzle temperatures and printing speeds, were also varied during filament and sample printing. The mechanical and morphological analysis was done on the produced samples. The mechanical analysis entailed measuring tensile strength, elongation, breakage, and Young’s modulus. Scanning electron microscopy (SEM) was used to test microstructures in the produced samples. On the other hand, the density test was used to determine the porosity of foamed filaments. Through optimizing foaming processes, we aimed to determine a combination of low material density with acceptable structural strength. The experimental results will enable us to understand how to make foamed PLA filaments for structurally optimized FDM.

Anahtar Kelimeler

• polymer
• additive manufacturing
• unmanned air vehicle

Kaynakça

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