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Shape morphing Kirigami mechanical metamaterials.

Robin M Neville1, Fabrizio Scarpa1, Alberto Pirrera1

  • 1Advanced Composites Centre for Innovation and Science (ACCIS), University of Bristol, Queens Building, University Walk, BS8 1TR, Bristol, UK.

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This study explores Kirigami-inspired mechanical metamaterials, revealing tuneable Poisson

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Physics

Background:

  • Mechanical metamaterials derive unique properties from their substructure design.
  • Kirigami, the art of paper cutting and folding, offers a novel approach to engineering these materials.

Purpose of the Study:

  • To investigate the Poisson's ratios of Kirigami-based cellular metamaterials.
  • To explore the tuneable mechanical properties and shape-changing capabilities of these engineered structures.

Main Methods:

  • Fabrication of Kirigami cellular metamaterials from composite sheets.
  • Utilizing analytical models and numerical simulations to analyze deformation characteristics.

Main Results:

  • Demonstrated large shape and volume changes in Kirigami metamaterials.
  • Showcased directional and tuneable mechanical properties.
  • Confirmed the ability to alter deformation characteristics through design.

Conclusions:

  • Kirigami cellular metamaterials offer significant potential for applications requiring controlled shape change.
  • These materials exhibit unique, engineerable mechanical responses.
  • The study highlights a promising avenue for advanced material design.