FDM Yöntemi ile Üretilen Güçlendirilmiş Çekirdek Hücrelerin Basınç Dayanımı, Enerji Sönümleme Özellikleri ve Deformasyon Modlarının İncelenmesi

Abstract

Sandviç paneller savunma sanayisi, havacılık ve otomotiv gibi yapısal ağırlık tasarrufu gerektiren birçok alanda kullanılmaktadır. Sandviç panellerin mekanik performansı büyük oranda çekirdek tasarımından etkilenmektedir. Periyodik hücrelere sahip sandviç panellerin çekirdek tasarımı ise birim hücre geometrisinin tekrarlı olarak üretilmesi ile oluşturulmaktadır. Bu çalışmada; geliştirilen güçlendirilmiş çekirdek hücrenin basma mukavemeti yarı statik basma yükü altında deneysel olarak incelenmiş, test sonuçları geleneksel bal peteği çekirdek ile karşılaştırılmıştır. Deneysel test numuneleri Eklemeli İmalat Yöntemi ile PLA Filament kullanılarak ile gerçekleştirilmiştir. İki farklı çekirdek tasarımı için deneysel test sonuçları kıyaslandığında, %20 doluluk oranında üretilen güçlendirilmiş çekirdek hücrenin, çekirdeğin maksimum ezilme direncini %28.54 oranında, enerji sönümleme kapasitesini ise %23.4 oranında arttırdığı tespit edilmiştir. Çekirdeklerin deformasyon davranışları incelendiğinde, güçlendirilmiş çekirdek hücrenin basma testi sırasında deformasyon yükünü çekirdek ekseninde tutuğu, duvar ayrılmasını geciktirdiği tespit edilmiştir. Ayrıca üretim esnasında belirlenen doluluk oranının çekirdeğin deformasyonu ve sıkışma direnci üzerinde etkili olduğu belirlenmiştir.

Keywords

• Eklemeli imalat
• çekirdek yapı
• petek çekirdek
• mekanik performans
• sıkıştırma testi

Investigation of the Compressive Strength, Energy Absorption Properties and Deformation Modes of the Reinforced Core Cell Produced by the FDM Method

Abstract

Sandwich panels are used in many sectors that require structural weight savings such as defence, aviation and automotive industry. The most important factor over the mechanical resistance of sandwich panels is the core design. The core design of sandwich panels with periodic cells is formed by repetitive production of the unit cell geometry. In this study; the compressive strength of the developed reinforced core cell was experimentally investigated under quasi-static compression load, and the test results were compared with the conventional honeycomb core. Experimental test samples were carried out by Fused Deposition Modeling (FDM) using PLA filament material. When the experimental test results for two different core designs were compared, it was determined that the reinforced core cell produced at 20% filling rate increased the maximum crushing resistance of the core by 28.54% and the energy absorbing capacity by 23.4%. According to the observed deformation behaviors, it was determined that the reinforced core cell kept the deformation load on the core axis during the compression test and delayed the core wall buckling. In addition, it was determined that the filling rate determined during production was effective on the deformation of the core and compression resistance.

Keywords

• Additive manufacturing
• core structure
• honeycomb core
• mechanical performance
• compression testing
• Eklemeli imalat
• çekirdek yapı
• petek çekirdek
• mekanik performans
• sıkıştırma testi

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