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Vibration and damping characteristics of auxetic honeycomb sandwich panels with polyurea-metal laminate face sheets

Qiang He, Jiamei Zhu, Lizheng Li, Yun Guo and Dejun Yan

Vol. 19 (2024), No. 3, 435–451
Abstract

All-metal sandwich panels of auxetic honeycomb are usually ultralight and robust but have poor vibration damping. The in-plane auxetic honeycomb sandwich panels (AHSPs) with polyurea-metal laminate (PML) were presented, and its vibration and damping characteristics were studied. The damping characteristic analysis model of the auxetic honeycomb sandwich structure of the PML panel was created by ABAQUS and the model was verified. The frequency/time response curve, natural frequency, mode shapes, and damping loss factor were simulated by the finite element (FE) method, which was then compared with the sandwich plate without a polyurea layer. To investigate potential enhancement processes and examine vibration-damping characteristics, a finite element-modal strain energy (FE-MSE) integrated approach was put forward, taking into account the natural frequency and damping behavior of polyurea. The damping of the PML panel significantly increased due to the viscoelastic energy consumption of the polyurea layer. By reasonably adjusting the thickness and distribution of the polyurea layer, the passive damping ability of sandwich panels can be further enhanced. The frequency and damping loss factor of the AHSPs were able to be successfully improved by raising the thickness of the polyurea layer. The symmetric PML-A laminate was better than the asymmetric structure in vibration reduction, and the damping loss factor can grow from 29% to 40%, with a thickness ratio of 3 3.

Keywords
vibration damping, sandwich panels, auxetic honeycomb, in-plane, viscoelastic polyurea
Milestones
Received: 1 August 2023
Revised: 27 October 2023
Accepted: 13 January 2024
Published: 27 March 2024
Authors
Qiang He
School of Mechanical Engineering
Jiangsu University of Science and Technology
Zhenjiang
China
Jiamei Zhu
School of Mechanical Engineering
Jiangsu University of Science and Technology
Zhenjiang
China
Lizheng Li
School of Mechanical Engineering
Jiangsu University of Science and Technology
Zhenjiang
China
Yun Guo
School of Mechanical Engineering
Jiangsu University of Science and Technology
Zhenjiang
China
Dejun Yan
Guangdong Provincial Key Laboratory of Advanced Welding Technology for Ships
CSSC Huangpu Wenchong Shipbuilding Company Limited
Guangzhou
China