Experimental investigation of the periodic core sandwich structure: Shape of the vibration modes

IF 1.9 4区工程技术 Q3 MECHANICS

Mechanics Research Communications Pub Date : 2025-05-13 DOI:10.1016/j.mechrescom.2025.104434

Guillaume ROBIN , Thomas HUCHARD , Marc PONÇOT , El Mostafa DAYA

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引用次数: 0

Abstract

The sandwich structure allows to shearing the viscoelastic core layer and increase passive damping. This paper focuses on an investigation of the modal behavior of the sandwich structures with homogeneous cores and periodic cores. Two polymers are selected for their adhesion properties to metal surfaces and their viscoelastic properties. A numerical approach is presented to solve the vibration problem and determine the response curve. Periodic sandwich beams are elaborated with two viscoelastic polymers which are chosen for these characteristics. Scanning vibration allows the measurement of the deflection shapes of the fourth mode. The deflection shapes in the case of a periodic core sandwich show discontinuities localized at the interfaces of the periodic structures. These irregularities in the deflection shapes can be predicted and localized by our numerical model. The results show the importance of considering the impact of the modal behavior using a periodic core sandwich.

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周期芯芯夹层结构的实验研究：振动模态的形状

夹层结构允许剪切粘弹性芯层，增加被动阻尼。本文主要研究了具有均匀芯和周期芯的夹层结构的模态行为。选择了两种聚合物，因为它们对金属表面的粘附性能和粘弹性性能。提出了一种求解振动问题和确定响应曲线的数值方法。周期夹层梁采用了两种粘弹性聚合物，这两种聚合物是根据这些特性选择的。扫描振动允许测量第四模态的偏转形状。在周期芯夹层的情况下，挠度形状显示出周期结构界面处的局部不连续。这些挠度形状的不规则性可以通过我们的数值模型来预测和定位。结果表明，考虑周期芯层夹心对模态性能影响的重要性。

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

Mechanics Research Communications 物理-力学

CiteScore

4.10

自引率

4.20%

发文量

114

审稿时长

9 months

期刊介绍： Mechanics Research Communications publishes, as rapidly as possible, peer-reviewed manuscripts of high standards but restricted length. It aims to provide: • a fast means of communication • an exchange of ideas among workers in mechanics • an effective method of bringing new results quickly to the public • an informal vehicle for the discussion • of ideas that may still be in the formative stages The field of Mechanics will be understood to encompass the behavior of continua, fluids, solids, particles and their mixtures. Submissions must contain a strong, novel contribution to the field of mechanics, and ideally should be focused on current issues in the field involving theoretical, experimental and/or applied research, preferably within the broad expertise encompassed by the Board of Associate Editors. Deviations from these areas should be discussed in advance with the Editor-in-Chief.