Kirigami Auxetic Pyramidal Core: Mechanical Properties and Wave Propagation Analysis in Damped Lattice

Fabrizio Scarpa, Morvan Ouisse, Manuel Collet, Kazuya Saito

Research output: Contribution to journalArticle (Academic Journal)

30 Citations (Scopus)

Abstract

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 out-of-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.
Original languageEnglish
Article number041001
Number of pages11
JournalJournal of Vibration and Acoustics
Volume135
Issue number4
DOIs
Publication statusPublished - 2013

Keywords

  • Elasticity, Deformation, Wave propagation, Wavelength, Composite materials, Manufacturing, Epoxy adhesives, Waves, Poisson ratio, Mechanical properties

Fingerprint Dive into the research topics of 'Kirigami Auxetic Pyramidal Core: Mechanical Properties and Wave Propagation Analysis in Damped Lattice'. Together they form a unique fingerprint.

Cite this