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

Abstract

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.

Investigation of low-velocity impact performances of sandwich composites manufactured using 3d printer

“…Ayrıca eklemeli imalat ile kompleks parçaların üretimi kalıp, döküm, enjeksiyon, kesim gibi geleneksel üretim yöntemlerine gerek duyulmadan yapılabilirliği de büyük avantaj sağlamaktadır [26]. 3D yazıcı teknolojisi kullanılarak PLA [27][28][29], akrilonitril bütadien stiren (ABS) [30,31] ve sürekli elyaf takviyeli termoplastik (CFRTP) [32] filamentler kullanılarak üretilen sandviç kompozitlerin basma [28], eğme [32][33][34] ve darbe dayanımları [19, 35,36] gibi mekanik özelliklerinin tespiti ile ilgili araştırmalar yapılmıştır. Sandviç kompozitlerin çekirdeklerini 3 boyutlu yazıcıda üreterek darbe dayanımlarını araştıran Usta vd.…”