3B yazıcıda farklı baskı yönlerinde üretilen PLA ve PLA Wood cıvataların mekanik özelliklerinin incelenmesi

Öz

Bu çalışmada, ticari Poliamid 6.6 (PA 6.6) cıvata ile eriyik yığma modelleme (EYM) yöntemiyle üretilen saf (katkısız) PLA (polilaktik asit) ve PLA-Wood (odun unu katkılı PLA) cıvataların tork dayanımları ve kırılma yüzeyleri incelenmiştir. 3B yazıcıda farklı baskı yönlerinde (0°, 45°, 90°) M8x1.25x70 boyutlarında cıvatalar üretilmiştir. Malzemelerin çekme, eğme, sertlik ve yüzey pürüzlülüğü özellikleri karşılaştırılmıştır. Çekme testinde, saf PLA malzemesi PLA-Wood’a göre yaklaşık %45; eğilme testinde ise %52 daha yüksek dayanım göstermiştir. Yüzey pürüzlülüğü açısından PLA-Wood, saf PLA’ya göre %29 daha pürüzlü yüzey sunmuştur. Tork testlerinde saf PLA, PLA-Wood’a kıyasla %79 daha yüksek tork dayanımı sergilemiştir. Ticari PA 6.6 cıvata ise yalnızca saf PLA’nın 0° yönelimli numunesinden daha düşük performans göstermiştir. Bu bulgular, baskı yöneliminin ve malzeme seçiminin 3B yazdırılmış bağlantı elemanlarının performansı üzerinde belirleyici olduğunu ve 0° yönelimin genel olarak en avantajlı sonuçları sağladığını ortaya koymaktadır. Elde edilen veriler, hafif yapısal uygulamalarda ve montaj-tamirat işlerinde referans niteliğindedir.

Anahtar Kelimeler

• Eriyik yığma modelleme
• PLA Wood
• Yazdırma yönü
• Cıvata

Investigation of the Mechanical Properties of PLA and PLA Wood Bolts Fabricated via 3D Printing with Different Print Orientations

Öz

This study investigates the torque resistance and fracture surfaces of pure PLA (polylactic acid) and PLA-Wood (wood flour added polylactic acid) bolts manufactured via Fused Deposition Modeling (FDM), compared to commercial Polyamide 6.6 (PA 6.6) bolts. M8×1.25×70 bolts were 3D-printed at varying orientations (0°, 45°, 90°) to evaluate the effects of printing direction on mechanical properties. The hardness, surface roughness, tensile strength, and flexural strength of pure PLA and PLA-Wood were analyzed. Results indicate that 0° print orientation yielded the highest mechanical strength, while significant degradation occurred at 45° and 90°. Surface roughness was minimized at 0° and peaked at 45°. PLA-Wood demonstrated inferior performance to pure PLA, and the torque resistance of PA 6.6 bolts was substantially lower than that of 0°-oriented pure PLA bolts. These findings provide critical insights for material selection and design in lightweight structural applications, assembly, and repair processes.

Anahtar Kelimeler

• Fused Deposition Modeling
• PLA Wood
• Print Orientation
• Bolt

Kaynakça

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