THE EFFECT OF INFILL PATTERN IN 3-DIMENSIONAL PRINTING ON TENSILE STRENGTH

Abstract

In this study, test specimens with different infill patterns and orientations were manufactured by using one of the 3D printing technologies, Fused Deposition Modeling (FDM) manufacturing technology, and polylactic acid (PLA) material, and the effects of the infill pattern and direction on the tensile strength were investigated. 10 samples of the same weight with five different infill patterns (concentric, grid, triangle, 3D hexagon, zig-zag) and three different infill pattern angles (0°, 45°, 90°) and one solid sample (100% infill) were fabricated with FDM technology. A mechanical tensile test was applied to all specimens. As a result of the mechanical tensile test; it was determined that the second specimen (90° infill pattern angle, concentric) and eleventh specimen (90° fill pattern angle, zig zag) had higher strength than the other specimens with the same weight. It has been seen that the high strength of the concentric specimen is related to the direction of the infill pattern, and therefore the selection of the infill pattern angles and directions in the direction of the applied forces provides a great advantage. In addition, as a result of the tensile test, it was observed that the specific strength of the second specimen with 30% infill was approximately 25% higher than the first specimen with 100% infill. This study has shown that more durable, lighter and low-cost designs can be achieved by planning the infill type and angle for the 3D printing process according to the working and loading conditions.

Keywords

• Additive Manufacturing
• Fused Deposition Modeling (FDM)
• Polylactic Acid (PLA)
• Infill Pattern
• Tensile Strength

3 BOYUTLU BASKIDA DOLGU BİÇİMİNİN ÇEKME DAYANIMINA ETKİSİ

Abstract

3B baskı teknolojilerinden biri olan ergiterek yığma ile modelleme (FDM) üretim teknolojisi ve polilaktik asit (PLA) malzemesi kullanarak farklı dolgu deseni ve yönüne sahip çekme testi numuneleri üretilmiş ve dolgu deseni ve yönünün çekme dayanımına olan etkileri incelenmiştir. Beş farklı dolgu deseni (eş merkezli, ızgara, üçgen, 3B altıgen, zik zak) ve üç farklı dolgu desen açısına (0°, 45°, 90°) sahip aynı ağırlıkta 10 adet numune ve bir adet de tam dolu numune FDM teknolojisi ile basılarak toplam 11 adet numune üretilmiştir. Tüm numunelere mekanik çekme testi uygulanmıştır. Mekanik çekme testi sonucunda; ikinci numunenin (90° dolgu desen açılı, eş merkezli), aynı ağırlıktaki diğer numunelere göre daha yüksek dayanıma sahip olduğu tespit edilmiştir. Eş merkezli numunenin aynı ağırlıktaki diğer numunelere göre dayanımının yüksek olması, baskı desen yönünün çekme yönüyle bağlantılı olduğu ve dolayısıyla baskı sırasında baskı desen açılarının ve yönlerinin uygulanan kuvvetler doğrultusunda seçilmesinin büyük avantaj sağladığı görülmüştür. Ayrıca, %30 doluluk oranındaki ikinci numunenin %100 doluluk oranına sahip birinci numuneye göre özgül dayanımının yaklaşık %25 oranında daha yüksek olduğu çekme testi sonucunda gözlemlenmiştir. Bu nedenle parçaların çalışma şartlarında maruz kaldıkları yüklenme durumları dikkate alınarak tam dolulukla basılmış parçalarla aynı dayanıma sahip daha hafif ve daha az maliyetli tasarımların yapılabileceği sonucu ortaya çıkmıştır.

Keywords

• Eklemeli İmalat
• Ergiterek yığma ile modelleme (FDM)
• Poliaktik Asit (PLA)
• Dolgu Deseni
• Çekme Dayanımı

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