A broadband damper design inspired by cartilage-like relaxation mechanisms. (13th October 2017)

• Record Type: Journal Article
• Authors: Liu, Lejie; Usta, Ahmet D.; Eriten, Melih
• Is Part Of: Journal of sound and vibration. Volume 406(2017)
• Page Start: 1
• Page End: 14
• Publication Date: 2017-10-13
• Subjects: Poroelasticity -- Broadband damper -- Bio-inspired dissipation -- Fractional Zener models; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2017.06.010
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: In this study, we introduce a broadband damper design inspired by the cartilage-like relaxation mechanisms. In particular, we study broadband (static to 10 kHz) dissipative properties of model cartilage systems by probe-based static and dynamic indentation, and validate that fractional Zener models can simulate the empirical data up to a desirable accuracy within the frequency range of interest. Utilizing these observations, we design a composite damper design where a poroelastic layer is sandwiched between two hard materials, and load transfer occurs across interfaces with multiple length scales. Modeling those interfaces with fractional Zener elements in parallel configuration, and manipulating the distribution of the Zener elements across different peak relaxation frequencies, we obtain a relatively constant loss factor within an unprecedented frequency range ( 3-3 kHz). We also discuss how these findings can be employed in a practical damping design.