Microscopic damping mechanism of micro-porous metal films

Du, Guangyu; Tan, Zhen; Li, Zhuolong; Liu, Kun; Lin, Zhang; Ba, Yi; Ba, Dechun

doi:10.1016/j.cap.2018.08.002

Cited by 8 publications

(4 citation statements)

References 27 publications

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“…The enhancement of the damping effect and reduction of the mass cost is one of the major concerns in research and engineering, especially, the broadband and strong reduction in middle to low frequency ranges. Multiple approaches have been studied, including the topology optimization of the damping structures, the design of new damping materials or structures, active/active-passive hybrid damping and so on [10][11][12][13][14][15][16][17]. For instance, Zheng et al [10] compared the vibration reduction from different optimization algorithms for the design of constrained layer damping.…”

Section: Introductionmentioning

confidence: 99%

“…Yun et al [14] carried out the microstructural topology optimization of viscoelastic material of damped structures, and the microstructure was composed of periodic unit cell and the homogenization method was used. Du et al [15] investigated the damping microscopic mechanism of porous metal films, and indicated that the generated micro-cracks can improve the damping performance of the film. Moita et al [16] studied the active-passive damping in functionally graded sandwich plate/shell structures.…”

Section: Introductionmentioning

confidence: 99%

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APVC2021 - Low frequency and broadband vibration and sound radiation reduction of panels from high performance metamaterial damping

Song

Chen

Zhang

et al. 2023

Preprint

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The low frequency and broadband reduction of vibration and sound from damping treatment is one of the major concerns in research and engineering. In this paper, the combination of artificial metamaterial and damping design is used to improve the reduction effect. The vibration and sound radiation properties of the bare, free layered damping and metamaterial damping panels are compared and studied. Via the comparison of various panels, the vibration and sound radiation reduction and the enhancement from metamaterial damping are analysed. The effects of the material parameters of metamaterial damping elements are studied also. The numerical results indicate that the vibration reduction is significantly improved from the metamaterial damping in quite wide frequency ranges from low to high frequencies; the sound radiation is suppressed effectively also, especially the peaks are reduced obviously. A better reduction effect can be obtained via metamaterial design even with the same added mass as traditional damping treatment, especially, at the middle to low frequencies. The effects from the material parameters of metamaterial damping design are different from those of free layered damping design. And the manipulation and control of the damping effects from metamaterial design will be flexible and easy to realize. Further, an experimental system is built, and the experimental study and verification are carried out. The significant reduction and obvious enhancement from metamaterial damping design are observed from the experimental results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

APVC2021 - Low frequency and broadband vibration and sound radiation reduction of panels from high performance metamaterial damping

Song

Chen

Zhang

et al. 2023

Preprint

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“…Исследованию внутреннего трения в пористых материалах посвящено довольно много работ. Это относится как к объемным образцам [5,6], так и к пленкам [7]. В настоящей работе рассматривается механизм зернограничного внутреннего трения с участием цилиндрических пор, расположенных параллельно друг другу и лежащих в межзеренных границах.…”

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“…Внутреннее трение на всем участке границы Q −1 между тройными стыками зерен равно сумме выражений для каждого сегмента. Воспользовавшись (3), (6) и (7), находим…”

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Внутреннее Трение На Границах Зерен, Содержащих Протяженные Поры

Кульков¹,

Сыщиков²

2019

Письма В Журнал Технической Физики

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A model of internal friction at a grain boundary containing equidistant parallel cylindrical pores is presented. Variable shear stress induces a mutual displacement of the interfacial regions matched at the segments between pores depending on their position. The values of scattered energy at each segment and total internal friction are determined. The temperature dependence of the internal friction has a form of a wide peak.

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Effect of porosity on shock propagation behaviour of single crystal aluminium: A molecular dynamics investigation

Sharma

Dubey

2023

Mechanics of Materials

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Microscopic damping mechanism of micro-porous metal films

Cited by 8 publications

References 27 publications

APVC2021 - Low frequency and broadband vibration and sound radiation reduction of panels from high performance metamaterial damping

APVC2021 - Low frequency and broadband vibration and sound radiation reduction of panels from high performance metamaterial damping

Внутреннее Трение На Границах Зерен, Содержащих Протяженные Поры

Effect of porosity on shock propagation behaviour of single crystal aluminium: A molecular dynamics investigation

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