Study on the influence of hole shapes on the fluid and mechanical properties of perforated honeycomb sandwich structures

Abstract

Abstract Due to the high load and heat transfer capacity, porous honeycomb sandwich structures are widely in engineering. However, in functional requirements, mass and heat transfer should be realized which results and perforated holes being applied in sandwich structures. The shape of the holes plays a crucial role in further improving the load-bearing and flow-resistance performance of the structure. In this study, the influence of hole shape on the flow resistance, permeability, and mechanical properties of perforated honeycomb sandwich structures are systematically studied. Five different hole shapes with the same area are considered, and the flow resistance, permeability, and maximum Mises stress of the perforated honeycomb sandwich structure under the five conditions are calculated. The results show that the hole shape does have a significant influence on the flow resistance, permeability, and mechanical properties of the structure, and especially, it is especially found that the circular structure has the lowest flow resistance and the rectangular structure has the highest load-bearing capacity.