Journal of Science and Technology of Composites

Journal of Science and Technology of Composites

Free Vibration of Auxetic-Core Sandwich Plate in Fluid by Equivalent Single Layer Theory

Document Type : Research Paper

Authors
Korosh Khorshidi 1
Alireza Pakrouyan 2
Peyman Yousefi 2
Ali Pourmahdi 1
1 Department of mechanical engineering, Arak University, Arak, Iran.
2 Department of mechanical engineering, Islamic Azad University, Arak, Iran.
10.22068/jstc.2026.2073996.1939
Abstract
In this study, the free vibration characteristics of a rectangular sandwich plate with an auxetic honeycomb core mounted on the wall of a fluid-filled tank are investigated. The sandwich plate consists of two aluminum face sheets and an auxetic honeycomb core made of aluminum. For the homogenization of the honeycomb core, in addition to the Gibson and Ashby model, one of the latest models (the Turna-Ban model) is also employed. Three types of analytical models are proposed for modeling the sandwich plate, and their advantages and disadvantages are compared. An equivalent single-layer analytical model is used to model the sandwich plate under Navier boundary conditions and in contact with fluid. The fluid is considered ideal (incompressible, inviscid, and irrotational).The proposed solution methods, the homogenization relations of the honeycomb core, and the mathematical framework of the plate–fluid interaction are validated using results from previous studies as well as three-dimensional finite element analysis. Finally, the effects of various parameters such as the tank-to-plate length ratio, fluid height from the bottom edge of the plate, the position of the plate on the tank wall, and the honeycomb cell geometry on the wet natural frequencies are investigated
Keywords
Free vibration, Sandwich Plate, Auxetic Core, Fluid&‌‌‌‌‌‌‌ndash
Structure Interaction

Subjects

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Journal of Science and Technology of Composites
Volume 12, Issue 3
Autumn 2025
Pages 2792-2809