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research article

Dynamic response of chiral truss-core assemblies

Spadoni, Alessandro  
•
Ruzzene, Massimo
•
Scarpa, Fabrizio
2006
Journal Of Intelligent Material Systems And Structures

Periodic cellular configurations with negative Poisson's ratio have attracted the attention of several researchers because of their superior dynamic characteristics. Among the geometries with a negative Poisson's ratio, the chiral topology features localized deformed configurations when excited at one of its natural frequencies. This is of particular importance as resonance can be exploited to minimize the power required for the appearance of localized deformations, thus giving practicality to the concept. The particular nature of these deformed configurations and the authority provided by the chiral geometry suggest the application of the proposed structural configuration for the design of innovative lifting devices, such as helicopter rotor blades or airplane wings. The dynamic characteristics of chiral structures are here investigated through a numerical model and experimental investigations. The numerical formulation uses dynamic shape functions to accurately describe the behavior of the considered structural assembly over a wide frequency range. The model is used to predict frequency response functions, and to investigate the occurrence of localized deformations. Experimental tests are also performed to demonstrate the accuracy of the model and to illustrate the peculiarities of the behavior of the considered chiral structures.

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Type
research article
DOI
10.1177/1045389X06060219
Author(s)
Spadoni, Alessandro  
Ruzzene, Massimo
Scarpa, Fabrizio
Date Issued

2006

Publisher

SAGE Publications

Published in
Journal Of Intelligent Material Systems And Structures
Volume

17

Issue

11

Start page

941

End page

952

Subjects

chiral structure

•

truss-core designs

•

dynamic shape control

•

Negative Poissons Ratio

•

Vibration

•

Honeycomb

•

Plates

•

Panel

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LOMI  
Available on Infoscience
May 2, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/66952
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