Effect of boundary factor and material property on single square honeycomb sandwich panel subjected to quasi-static compression loading

Abstract

This paper is aimed to investigate the crushing response of single square honeycomb panels under quasi-static compression loading. Two types of materials are used in this study, which refers to 100 % polylactic acid (PLA) and 70 % PLA filled 30 % carbon fibre (PLA/CF). Single honeycomb panels were fabricated through additive manufacturing technique, and assembled using slotting technique. The effect of boundary factor on the single square honeycomb panels have been studied, which refers to none, single-side, double-side boundary conditions. The effect of material properties on the crushing response has also involved. For the tensile test, it was concluded that the PLA/CF specimen offered the higher young modulus with 428.75 MPa than 360.76 MPa of PLA specimen. For the quasi-static compression test, the compressive modulus and strength of the single honeycomb sandwich panel showed 489.69 MPa and 18.32 MPa with boundary type 1, which provided the highest value compared to other two boundary condition types. Moreover, the square honeycomb sandwich panels with PLA/CF material and type 3 boundary condition offered the better crushing performance on energy absorption (EA) with 66.42 kJ and specific energy absorption (SEA) with 2282.47 kJ/kg. In addition, the crushing behaviour and failure mode were also involved and discussed in this study.

Load bearing investigations on novel Acrylonitrile butadiene styrene‐carbon quantum dots 3D printed core/bamboo fiber polyester sandwich composite for structural applications

“…The inclusion of bamboo fiber to the polyester matrix, which is able to sustain the applied load and transfers it more uniformly, which is further, contributed to increase in the mechanical characteristics. This is caused by the reaction of the NH 2 functional group generated on fiber by silane treatment has increased the adhesion of bamboo fiber with polyester resin 37 …”

“…This is caused by the reaction of the NH 2 functional group generated on fiber by silane treatment has increased the adhesion of bamboo fiber with polyester resin. 37 However, inclusion of coffee grounds carbon quantum dots by 10, 15, and 20 phr of ABS shows the gradual increment in flatwise tensile and compression strength, edgewise compression, flexural strength and peel strength. But in ABS 20 phr of C-dost incorporation gives the highest values for flatwise tensile and compression strength, edgewise compression, flexural strength and peel strength as compared all of other combinations about 0.77, 1.56, 56.04, 54.85, and 1.98 MPa.…”

Research Progress on Curved Plates in China: Applications in Architecture

“…Especially for the former, there should be a systematic and complete structural design and optimization process for the rational arrangement of curved surface elements and the overall mechanical characteristics. The development of geometrically adjustable curved sandwich plates (such as honeycomb plates [113] and beetle elytron plates [114]) and other elements will be able to better adapt to various curved surface construction projects by virtue of their lightweight and highstrength characteristics, achieving broad application prospects. In addition, in recent years, abnormal climate conditions (i.e., large typhoons) have frequently appeared, and because curved surface buildings in China are primarily large and medium public buildings, their safety should be tested with scale models using techniques such as wind tunnels (wind resistance) and shaking tables (earthquake resistance).…”

In-Plane Elastic Properties of 3D-Printed Graded Hierarchical Hexagonal Honeycombs

“…Honeycombs are of immense interest in multifunctional applications because of their excellent specific stiffness and strength [ 1 , 2 ]. Consequently, in the past decades, many studies have been carried out to explore the specific stiffness and strength of honeycombs with different cross-sections such as square [ 3 , 4 ], hexagon [ 5 ], and other polygons [ 6 ]. However, the performance of these honeycombs is not always satisfactory and usually requires improvement [ 7 ].…”