3B Baskı ile Farklı Kontur Sayısı ve Dolgu Deseni ile Üretilen PLA Parçaların Çekme Dayanımına Deformasyon Hızının Etkisinin Araştırılması

Year 2025, Volume: 25 Issue: 6, 1481 - 1490

Emir Uysal , Eray Şen , Bayram Yıldız , Berkay Ergene

Abstract

Günümüz eklemeli imalat teknolojileriyle polimer, seramik, metal ve kompozit malzemelerden, mühendislik uygulamalarında talep edilen özellikleri karşılayacak karmaşık geometrili parçaların üretimi mümkün hale gelmiştir. Özellikle, kolay ve ucuz bir şekilde temin edilebilirliğinin yanı sıra, üretim parametrelerinin optimizasyonu ile arzu edilen dayanım değerlerini karşılayan polimer malzemeler sıklıkla malzeme ekstrüzyon esaslı eriyik yığma modelleme ile üretilebilmektedir. Endüstriyel uygulamalar olarak biyomedikalden, otomotiv sektörüne dek bir çok alanda tercih edilen polimerlerden biri de polilaktik asittir. Bu çalışmanın amacı ise, sıklıkla kullanılan polilaktik asit malzemeden üretilen eklemeli imalat ürünlerinde üretim parametrelerinden olan dolgu deseni ve kontur sayısı ile bir test parametresi olan deformasyon hızının ilgili ürünlerin çekme dayanım değerlerine olan etkisini incelemektir. Bu bağlamda, üç farklı dolgu deseni (zikzak, üçgen ve kübik) ve üç farklı kontur sayısı (2, 3 ve 4) ile üretilen çekme test numuneleri üç farklı deformasyon hızında (1, 5 ve 25 mm/dakika) çekme testine tabi tutularak çekme dayanımları elde edilmiş ve kırılma yüzeyleri incelenmiştir. Elde edilen bulgular neticesinde, kontur sayısının artmasıyla birlikte çekme dayanım değerlerinin arttığı, dolgu desenlerinin etkilerinin deformasyon hızına bağlı olarak değişim gösterdiği ve son olarak da artan deformasyon hızı ile birlikte çekme dayanım değerlerinin de arttığı tespit edilmiştir.

Keywords

Eriyik yığma modelleme , Polilaktik asit , Çekme dayanımı , Dolgu deseni , Kontur sayısı , Deformasyon hızı

Investigation of the Effect of Deformation Rate on the Tensile Strength of PLA Parts Produced by 3D Printing with Different Contour Number and Infill Pattern

Abstract

In the contemporary era of additive manufacturing technologies, the production of components with intricate geometries from a diverse array of materials, including polymers, ceramics, metals and composites, has become a reality. In particular, polymer materials, which are easily and inexpensively available, as well as meeting the desired strength values by optimizing the production parameters, can often be produced by material extrusion based fused deposition modelling. Polylactic acid, a polymer of choice in numerous fields, including biomedical and automotive applications, is of particular interest in this study. The objective of this study is to investigate the effect of infill pattern and number of contours, which are production parameters, and deformation rate, which is a test parameter, on the tensile strength values of the related products in additive manufacturing products produced from the frequently used polylactic acid material. To this end, tensile test specimens were fabricated using three distinct infill patterns (zigzag, triangle and cubic) and three different contour numbers (2, 3 and 4). These specimens were then subjected to tensile testing at three different deformation rates (1, 5 and 25 mm/min). The resultant tensile strengths were obtained and the fracture surfaces were examined. The findings indicated that tensile strength values increased with an increase in the number of contours, that the effects of infill patterns varied depending on the deformation rate, and finally, that tensile strength values increased with increasing deformation rate.

Keywords

Fused deposition modelling , Polylactic acid , Tensile strength , Infill pattern , Number of contour , Deformation rate

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