Yazdırma Açısının 3B Yazıcıda Üretilen PLA Numunenin Mekanik Özellikleri Üzerine Etkisinin Deneysel ve Sonlu Elemanlar Metodu ile İncelenmesi

Year 2023, , 529 - 540, 05.07.2023

Özkan Öz , Fatih Huzeyfe Öztürk

https://doi.org/10.2339/politeknik.882313

Cited By: 4

Abstract

Eriyik yığma modelleme, 3B yazıcıların gelişimi ve çeşitlenmesi ile sanayi ve evsel kullanımda tercih edilen önemli bir teknoloji haline gelmiştir. Ancak, 3B yazıcılarda yazdırılan parça dayanımını etkileyen parametre sayısı oldukça fazladır. Bu çalışmada, 3B yazıcı kullanılarak üretilen numunelerde yazdırma açısının mekanik özelliklere etkisi deneysel yöntem ve sonlu elemanlar metodu kullanılarak incelenmiştir. Test numunelerinin yazdırılmasında PLA filament ve farklı yazdırma açıları (0°, 45°, 90°) kullanılmıştır. Sonlu elemanlar analizinde numuneler transvers izotropik malzeme olarak kabul edilmiştir. Malzemenin plastik davranışı Hill akma kriteri ile tanımlanmıştır. Çalışmanın ilk aşamasında, 0°, 45° ve 90° yazdırma açıları için sonlu elamanlar analiz sonuçları ve deneysel sonuçlar karşılaştırılmıştır. Karşılaştırma sonuçları, yazdırılan numunelerin dayanımının belirlenmesinde transvers izotropik malzeme kabulü ve Hill akma kriterinin kullanılabileceğini göstermiştir. Çalışmanın son aşamasında, 15°, 30°, 60°, 75° yazdırma açıları için sonlu elemanlar analizleri tekrarlanmıştır. Sonlu elemanlar analizi ve deneysel sonuçlar, numunelerin mekanik özelliklerinin ve maksimum yük değerlerinin yazdırma açısının artması ile belirgin şekilde yükseldiğini göstermiştir.

Keywords

3B yazıcı, yazdırma açısı, Hill akma kriteri, mekanik özellikler

Investigation of the Effects of Printing Angle on Mechanical Properties of PLA Specimen Fabricated with 3D Printer by using Experimental and Finite Elements Method

Abstract

Fused deposition modeling has become an important technology preferred in industrial and domestic use with the development and diversification of 3D printers. However, the number of parameters that affect the strength of the printed part in 3D printers is quite high. In this study, the effect of printing angle on the mechanical properties of the specimens fabricated with 3D printer was investigated through experimental and finite elements method. PLA filament and different printing angles (0°, 45°, 90°) were used for printing the test specimens. Specimens were accepted as transversely isotropic in the finite elements analysis. The plastic behavior of the material was explained by Hill yield criterion. In the first stage of the study, results of finite elements analysis and experimental study for 0°, 45° and 90° printing angles were compared. Comparison results showed that the acceptance of transversely isotropic material and Hill yield criterion can be used to determine the strength of the printed part. In the last stage of the study, finite elements analysis was repeated for 15°, 30° 60°, 75° printing angles. The finite element analysis and experimental results showed that the mechanical properties and maximum load values of specimens increased significantly with increasing of printing angle.

Keywords

3D printer, printing angle, Hill yield criterion, mechanical properties

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