Chiral hexagonal cellular sandwich structure: A vibroacoutic assessment

In this work we describe the vibroacoustic behavior of a novel concept of core for sandwich structures featuring auxetic characteristics, enhanced shear stiffhess and compressive strength compared to classical cellular cores in sandwich components for sandwich applications. The out-plane properties and density values are described in terms of geometric parameters of the honeycomb unit cells. Opposite to classical honeycomb cellular applications, the hexagonal chiral structure presents a noncentresymmetric configuration, i.e., a "mirror" symmetrical topology. The derived mechanical properties are used to assess the modal behaviour and modal densities of sandwich plate elements with chiral and standard cellular cores. The analytical findings are backed up by structural tests on chiral honeycomb plates and sandwich beams.

Published in:
Smart Structures and Materials 2005: Damping and Isolation, 5760, 559-568
Presented at:
Smart Structures and Materials 2005 Conference, San Diego, CA, Mar 07-10, 2005
Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa

 Record created 2011-05-02, last modified 2018-03-17

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