Koruk, H; Rajagopal, S (2024) A comprehensive review on viscoelastic parameters used for engineering materials including soft materials and the relationships between different damping parameters. Sensors, 24 (18). 6137

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Abstract

Although the properties of a structure such as mass and stiffness can be determined by some statical tests, the identification of damping requires a dynamic test. In general, both theoretical prediction and experimental identification of damping is quite difficult. There are different techniques for damping identification, and each method gives a different damping parameter. The dynamic indentation method, rheometry (and viscometry), atomic force microscopy, hysteresis loop, logarithmic decrement, and resonant vibration tests (or experimental modal analysis) are commonly used to identify the damping of materials, including soft biomaterials. Although the viscous damping ratio, loss factor, complex modulus and viscosity are quite common to describe damping of materials, there are some other parameters such as the specific damping capacity, loss angle, half-power bandwidth, logarithmic decrement, and inverse quality factor to describe damping of various materials. Often one of these parameters is measured in practical applications and the measured damping parameter needs to be converted to another damping parameter for comparison purposes. In this comprehensive review, the theoretical derivations of different parameters for the description and quantification of damping and their relationships, and the methods for damping identification are presented. The expressions for both high damping (accurate formulas) and low damping (approximate formulas) are included and evaluated. This paper could be a primary resource for damping research and teaching.

Item Type:	Article
Keywords:	damping; complex modulus; loss factor; characterisation; soft material; ultrasound; viscoelastic properties; viscosity; dynamic indentation; rheometry
Subjects:	Acoustics > Ultrasound
Divisions:	Medical, Marine & Nuclear
Identification number/DOI:	10.3390/s24186137
Last Modified:	27 Nov 2024 13:56
URI:	https://eprintspublications.npl.co.uk/id/eprint/10104