Kirigami auxetic pyramidal core: Mechanical properties and wave propagation analysis in damped lattice

Fabrizio Scarpa, Morvan Ouisse, Manuel Collet, Kazuya Saito

研究成果: ジャーナルへの寄稿学術誌査読

38 被引用数 (Scopus)

抄録

The work describes the manufacturing, mechanical properties, and wave propagation characteristics of a pyramidal lattice made exhibiting an auxetic (negative Poisson's ratio) behavior. Contrary to similar lattice tessellations produced using metal cores, the pyramidal lattice described in this work is manufactured using a kirigami (origami plus cutting pattern) technique, which can be applied to a large variety of thermoset and thermoplastic composites. Due to the particular geometry created through this manufacturing technique, the kirigami pyramidal lattice shows an inversion between in-plane and outof-plane mechanical properties compared to classical honeycomb configurations. Long wavelength approximations are used to calculate the slowness curves, showing unusual zero-curvature phononic properties in the transverse plane. A novel 2D wave propagation technique based on Bloch waves for damped structures is also applied to evaluate the dispersion behavior of composite (Kevlar/epoxy) lattices with intrinsic hysteretic loss. The 2D wave propagation analysis shows evanescence directivity at different frequency bandwidths and complex modal behavior due to unusual deformation mechanism of the lattice.

本文言語英語
論文番号041001
ジャーナルJournal of Vibration and Acoustics, Transactions of the ASME
135
4
DOI
出版ステータス出版済み - 2013
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 音響学および超音波学
  • 材料力学
  • 機械工学

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