Investigation of Bending Strength of Honeycomb Sandwich Structures with Different Cell Diameters Produced by 3D Printer

Öz

Honeycomb structures are frequently used in many constructions today. For this reason, the investigation of the mechanical properties of products produced from honeycomb structures is a current issue. In this study, the bending strengths of sandwich structures with honeycomb core produced with a three-dimensional printer using ABS and PLA materials were experimentally investigated. In the experiments, the effect of the cell diameter change of the honeycomb core on the bending strength was investigated experimentally in the sandwich structures. For this purpose, experiments were carried out for three different cell diameters. A total of eighteen three-point bending tests were applied, with each experiment repeated three times. In addition, positioning equipment has been specially designed and produced to increase the reliability of the experiments. As a result of the experiments carried out, force-elongation curves were obtained. It has been determined that the samples produced from PLA material are more durable than ABS samples. In addition, it was determined that the samples with a cell diameter of 9 mm had the highest strength, while the samples with a cell diameter of 12 mm had the lowest strength for both materials.

Anahtar Kelimeler

• Additive manufacturing method
• 3D printer
• Flexural test
• Honeycomb structures
• Different cell diameters
• ABS
• PLA

3 Boyutlu Yazıcı ile Üretilen Farklı Hücre Çaplarındaki Bal Peteği Sandviç Yapıların Eğme Dayanımlarının İncelenmesi

Öz

Bal peteği yapılar günümüzde birçok konstrüksiyon içerisinde sıklıkla kullanılmaktadır. Bu nedenle bal peteği yapılarından üretilmiş ürünlerin mekanik özelliklerinin araştırılması güncel bir konu olarak karşımıza çıkmaktadır. Bu çalışmada bal peteği çekirdek yapısına sahip, ABS ve PLA malzemeleri kullanılarak üç boyutlu yazıcı ile üretilen sandviç yapıların eğme dayanımları deneysel olarak incelenmiştir. Deneylerde sandviç yapı içerisindeki, bal peteği çekirdek yapısının hücre çapı değişiminin, eğme mukavemeti üzerine etkisi deneysel olarak araştırılmıştır. Bu amaçla üç farklı hücre çapı için deneyler gerçekleştirilmiştir. Her bir deneyin üç kez tekrar edilmesi ile toplamda on sekiz adet üç nokta eğme testi uygulanmıştır. Ayrıca deneylerin güvenilirliğinin artırılması amacıyla özel olarak konumlandırma ekipmanı tasarlanmış ve üretilmiştir. Gerçekleştirilen deneyler sonucunda kuvvet – sehim eğrileri elde edilmiştir. PLA malzemeden üretilen numunelerin ABS numunelere göre daha mukavim olduğu tespit edilmiştir. Ayrıca her iki malzeme için de 9 mm hücre çapına sahip numunelerin en yüksek dayanıma sahip olduğu, 12 mm hücre çapına sahip numunelerin ise en düşük dayanıma sahip olduğu belirlenmiştir.

Anahtar Kelimeler

• Eklemeli imalat yöntemi
• 3B Yazıcı
• Eğme testi
• Bal peteği yapılar
• Farklı hücre çapı
• ABS
• PLA

Kaynakça

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