Vibration Characteristics of Shear Thickening Fluid-Based Sandwich Structures

IF 2 4区工程技术 Q3 ENGINEERING, CHEMICAL

Advances in Polymer Technology Pub Date : 2022-09-09 DOI:10.1155/2022/6959485

Ping Wang, Zhiyuan Chen, K. Qian, Kejing Yu

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引用次数: 2

Abstract

The vibration attenuation mechanism of shear thickening fluid- (STF-) filled sandwich structures was investigated in this study. Structural equivalent damping, stiffness, and mass increased simultaneously with the increase in the volume fraction of shear thickening fluid. However, the damping ratio decreased and natural frequency increased with the increase in structural mass. Thus, the damping ratio was not a monotonically increasing function of the volume fraction of STF. A modified shear strain model of the damping layer was developed based on the following conditions: (1) under the condition of small strain, shear thickening fluid was regarded as linear viscoelastic material, and (2) the warpage of the sandwich beam was considered during deformation and the influence of STF on the shear strain of sandwich beam. According to the modified shear strain model of the damping layer, the shear thickening occurred at 1 Hz to 20 Hz during vibration. Therefore, the resonance point of the structure shifted to the left. The predictions were in excellent agreement with the experimental results. The results demonstrated that shear thickening fluid improved the vibration damping performance of the sandwich structure, while the thickening ability was not the higher, the better.

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剪切增稠流体夹层结构的振动特性

研究了剪切增稠流体填充夹层结构的减振机理。随着剪切增稠液体积分数的增加，结构等效阻尼、刚度和质量同时增大。随着结构质量的增大，阻尼比减小，固有频率增大。因此，阻尼比不是STF体积分数的单调递增函数。基于以下条件建立了修正的阻尼层剪切应变模型:(1)在小应变条件下，将剪切增稠流体视为线性粘弹性材料;(2)在变形过程中考虑夹层梁的翘曲以及STF对夹层梁剪切应变的影响。根据修正的阻尼层剪切应变模型，振动过程中在1 ~ 20 Hz发生剪切增厚。因此，结构的谐振点向左偏移。预测结果与实验结果非常吻合。结果表明，剪切增稠液改善了夹层结构的减振性能，但并不是增稠能力越高越好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Polymer Technology 工程技术-高分子科学

CiteScore

5.50

自引率

0.00%

发文量

审稿时长

9 months

期刊介绍： Advances in Polymer Technology publishes articles reporting important developments in polymeric materials, their manufacture and processing, and polymer product design, as well as those considering the economic and environmental impacts of polymer technology. The journal primarily caters to researchers, technologists, engineers, consultants, and production personnel.