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Cellular Auxetic Structures for Mechanical Metamaterials: A Review.

Parth Uday Kelkar1,2, Hyun Soo Kim1,3, Kyung-Hoon Cho4

  • 1Center for Electronic Materials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.

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Summary

Advanced fabrication techniques enable the creation of architectured materials with unique properties. This review explores cellular auxetic structures for mechanical metamaterials and their industrial applications.

Keywords:
auxetic structurecellular structuremetamaterialnegative Poisson’s ratio

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Nanotechnology

Background:

  • Recent advances in lithography and 3D printing facilitate the fabrication of architectured materials with complex microstructures.
  • These designed materials exhibit unusual properties at micro- and nano-scales, offering improved performance for modern applications.
  • Metamaterials, a subset of architectured materials, possess superior properties like high static modulus, energy absorption, and negative Poisson's ratio (NPR).

Purpose of the Study:

  • To provide a comprehensive review of cellular auxetic structures for mechanical metamaterials.
  • To classify these structures based on their geometrical configuration.
  • To highlight their potential applications and facilitate industrial implementation.

Main Methods:

  • Classification of cellular auxetic structures based on geometrical configuration.
  • Review of state-of-the-art applications in sensors, actuators, medical industry, and defense.
  • Discussion on accelerating the material development process for these structures.

Main Results:

  • Identification and classification of a wide range of cellular auxetic structures.
  • Demonstration of the potential of these structures to exhibit unusual mechanical properties.
  • Highlighting successful implementations in advanced technological domains.

Conclusions:

  • Cellular auxetic structures represent a promising class of mechanical metamaterials with diverse applications.
  • Leveraging advanced fabrication techniques is crucial for realizing their full potential in industry.
  • Further research and development are needed to accelerate their adoption in practical applications.