Numerical and Experimental Investigation on Compressive Properties of Egg Box Cores in Biodegradable Sandwich Panels

Document Type : Research Article

Authors

1 Kharazmi umiversity

2 Department of Mechanical Engineering, Faculty of Engineering, Kharazmi University, Tehran, Iran

3 Centre of Research for Composite and Smart Materials and Structures, Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran

Abstract

In this study, the compression behavior of cardboard egg box cores with various stacking sequences used in sandwich structures is investigated both experimentally and numerically. A critical requirement of the design is that the structure is compatible with the environment (biodegradable), and its properties have been investigated through compression and tension testing. Egg boxes were chosen as the core material for sandwich structures due to their mechanical properties, excellent insulation properties, and strength. Also, the core shape in various stacking sequences were modeled in ABAQUS Finite Element code to simulate the behavior of the egg box core in compression. The results showed that the surrounding edges of the core were crushed and the truncated top region compressed. The increase in thickness of the egg boxes directly affected the compression properties. By doubling the thickness of the layers, the amount of energy absorbed by the core increased by more than 100%. By comparison of various stacking sequences of the cores, the one with double layers of the egg boxes overlapped showed an increase of 49% in stiffness, 108% in energy absorption, and 128% in strength. According to the results, the tangled arrangement of the second type of the core exhibits the highest load bearing, the greatest energy absorption, and less damage as compared to other core stacking sequences.

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Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 54, Issue 4
July 2022
Pages 843-858

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