Tee, Kong ORCID: https://orcid.org/0000-0003-3202-873X, Spadoni, A., Scarpa, F. and Ruzzene, M. (2010) Wave propagation in auxetic tetrachiral honeycombs. Journal of Vibration and Acoustics, 132 (3). 031007-031015. ISSN 0739-3717 (Print), 1528-8927 (Online) (doi:10.1115/1.4000785)

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Abstract

This paper describes a numerical and experimental investigation on the flexural wave propagation properties of a novel class of negative Poisson's ratio honeycombs with tetrachiral topology. Tetrachiral honeycombs are structures defined by cylinders connected by four tangent ligaments, leading to a negative Poisson's ratio (auxetic) behavior in the plane due to combined cylinder rotation and bending of the ribs. A Bloch wave approach is applied to the representative unit cell of the honeycomb to calculate the dispersion characteristics and phase constant surfaces varying the geometric parameters of the unit cell. The modal density of the tetrachiral lattice and of a sandwich panel having the tetrachiral as core is extracted from the integration of the phase constant surfaces, and compared with the experimental ones obtained from measurements using scanning laser vibrometers.

Item Type:	Article
Additional Information:	[1] First published in print and online simulateanously: 22 April 2010. [2] Published as: Journal of Vibration and Acoustics (2010), 132(3), 031007.
Uncontrolled Keywords:	acoustic wave propagation, bending, elastic waves, honeycomb structures, Poisson ratio, vibration measurement, vibrations
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments:	School of Engineering School of Engineering > Department of Civil Engineering
Related URLs:	Publisher Author Organisation
Last Modified:	14 Oct 2016 09:08
URI:	http://gala.gre.ac.uk/id/eprint/3289

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