Effect of Infill Density and Raster Angle on the Flexural Properties of FDM-Printed PLA+ Specimens

Yıl 2025, Cilt: 12 Sayı: 27, 451 - 462, 24.12.2025

Mete Han Boztepe

https://doi.org/10.54365/adyumbd.1754557

Öz

In this study, the effects of raster angle and infill density on the flexural properties of PLA+ specimens fabricated by the Fused Deposition Modeling (FDM) process were investigated. A three-point bending test was conducted according to the ASTM D790 standard to evaluate the flexural strength and flexural modulus. Two different raster angles (0° and 90°) and three infill densities (20%, 50%, and 100%) were selected to examine the mechanical behavior of the samples under bending loads. The specimen with 100% infill density exhibited the highest flexural strength of 101.82 MPa, which was approximately 30% higher than those of the 20% and 50% infill specimens. This enhancement is attributed to the reduced porosity and improved interlayer bonding, which allowed for more effective stress transfer under bending conditions. The influence of raster angle became more pronounced at higher infill densities. The sample with a 0° raster angle demonstrated approximately 6.9% higher flexural strength and 14% higher flexural modulus compared to the 90° raster angle sample at 100% infill density.

Anahtar Kelimeler

3D , FDM , PLA+ , Raster Angle

FDM ile Üretilen PLA+ Numunelerin Eğilme Özelliklerine Dolgu Yoğunluğu ve Yazma Açısının Etkisi

Öz

Bu çalışmada, Ergiterek Biriktirme Modelleme (FDM) yöntemiyle üretilen PLA+ numunelerin eğilme özellikleri üzerinde raster açısının ve dolgu yoğunluğunun etkileri incelenmiştir. Eğilme dayanımı ve eğilme modülünü değerlendirmek amacıyla ASTM D790 standardına uygun olarak üç noktalı eğilme testi gerçekleştirilmiştir. Eğilme yükleri altındaki mekanik davranışın etkilerini araştırmak için iki farklı raster açısı (0° ve 90°) ile üç farklı dolgu yoğunluğu (%20, %50 ve %100) seçilmiştir. %100 dolgu yoğunluğuna sahip numune, %20 ve %50 dolgu yoğunluğuna sahip numunelere kıyasla yaklaşık %30 daha yüksek olan 101,82 MPa’lık en yüksek eğilme dayanımına ulaşmıştır. Bu artış, eğilme yükleri altında daha etkin gerilme aktarımı sağlayan düşük gözenekliliğe ve gelişmiş katmanlar arası bağlanmaya atfedilmiştir. Raster açısının etkisi, özellikle yüksek dolgu yoğunluklarında belirgin hale gelmiştir. %100 dolgu yoğunluğunda 0° raster açısına sahip numune, 90° raster açısına sahip numuneye göre yaklaşık %6,9 daha yüksek eğilme dayanımı ve %14 daha yüksek eğilme modülü sergilemiştir.

Anahtar Kelimeler

3B , FDM , PLA+ , Yazma Açısı , Dolgu Yoğunluğu

Kaynakça

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