Wave Propagation in Auxetic Tetrachiral Honeycombs

KF Tee, Spadoni A, FL Scarpa, Ruzzene M

Research output: Contribution to journalArticle (Academic Journal)

83 Citations (Scopus)

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.
Translated title of the contributionWave Propagation in Auxetic Tetrachiral Honeycombs
Original languageEnglish
Pages (from-to)031007
Number of pages8
JournalJournal of Vibration and Acoustics
Volume132
DOIs
Publication statusPublished - 2010

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