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

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 strength 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 behaviours, 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 strength.