TY  - JOUR
AV  - none
TI  - Optimal design of auxetic hexachiral metamaterials with local resonators
ID  - eprints3122
IS  - 5
UR  - http://iopscience.iop.org/0964-1726/page/Forthcoming%20articles;jsessionid=31FBD842F9130CB8755AA993BE1E87FF.c2.iopscience.cld.iop.org#id2
JF  - Smart Materials and Structures
N2  - A parametric beam lattice model is formulated to analyse the propagation properties of elastic in-plane waves in an auxetic material based on a hexachiral topology of the periodic cell, equipped with inertial local resonators. The Floquet-Bloch boundary conditions are imposed on a reduced order linear model in the only dynamically active degrees-offreedom. Since the resonators can be designed to open and shift band gaps, an optimal design, focused on the largest possible gap in the low-frequency range, is achieved by solving a maximization problem in the bounded space of the significant geometrical and mechanical parameters. A local optimized solution, for a the lowest pair of consecutive dispersion curves, is found by employing the globally convergent version of the Method of Moving asymptotes, combined with Monte Carlo and quasi-Monte Carlo multi-start techniques.
PB  - IOPScience
VL  - 25
EP  - 41
SN  - 0964-1726
Y1  - 2016///
A1  - Bacigalupo, Andrea
A1  - Lepidi, Marco
A1  - Gnecco, Giorgio
A1  - Gambarotta, Luigi
ER  -