6 papers
Wave polarisation and dynamic degeneracy in a chiral elastic lattice
G. Carta, I. S. Jones, N. V. Movchan +1
This paper addresses fundamental questions arising in the theory of Bloch-Floquet waves in chiral elastic lattice systems. This area has received a significant attention in the con…
Platonic Localisation: One Ring to Bind Them
A. B. Movchan, R. C. McPhedran, G. Carta +1
In this paper, we present an asymptotic model describing localised flexural vibrations along a structured ring containing point masses or spring-mass resonators in an elastic plate…
Vibrations and elastic waves in chiral multi-structures
Michael Nieves, Giorgio Carta, Ian Jones +2
We develop a new asymptotic model of the dynamic interaction between an elastic structure and a system of gyroscopic spinners that make the overall multi-structure chiral. An impor…
Interfacial waveforms in chiral lattices with gyroscopic spinners
Marta Garau, Giorgio Carta, Michael Nieves +3
We demonstrate a new method of achieving topologically protected states in a discrete hexagonal lattice by attaching gyroscopic spinners, which bring chirality to the system. Dispe…
Platonic crystal with low-frequency locally resonant snail structures. Wave trapping, transmission amplification and shielding
M. Morvaridi, G. Carta, M. Brun
We propose a new type of platonic crystal. The proposed microstructured plate includes snail resonators with low-frequency resonant vibrations. The particular dynamic effect of the…
Porous Materials with Omnidirectional Negative Poisson's Ratio
Giorgio Carta, Michele Brun, Antonio Baldi
This paper presents an auxetic medium, consisting of a two-dimensional perforated sheet where the holes are arranged in a repetitive pattern. The hexagonal disposition of the perfo…