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Origami Morphing Surfaces with Arrayed Quasi-Rigid-Foldable Polyhedrons.

Jiacong Li1,2,3, Jiali Bao1,2,3, Chengyeh Ho1,2,3

  • 1Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 31, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a quasi-rigid-foldable (QRF) polyhedron for artificial morphing surfaces. This novel structure offers high adaptability and shear stiffness, overcoming limitations of soft materials for applications like electromagnetic wave modulation and robotics.

Keywords:
foldable polyhedronmorphing surfacequasi‐rigid‐foldabilitysoft robot

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Area of Science:

  • Materials Science
  • Robotics
  • Metamaterials

Background:

  • Artificial morphing surfaces mimic biological tissues but suffer from low shear stiffness in soft materials.
  • Rigid-foldable cylinders offer high adaptability and stiffness but face shape/area change issues during folding.
  • Existing morphing surfaces lack the necessary properties for seamless integration and practical application.

Purpose of the Study:

  • To introduce a new metric, the quasi-rigid-foldable (QRF) rate, for quantifying the rigid-foldability of structures.
  • To propose a novel QRF polyhedron for advanced morphing surfaces.
  • To address the limitations of current artificial morphing surfaces, particularly regarding shear stiffness and geometric compatibility.

Main Methods:

  • Development and experimental validation of the quasi-rigid-foldable (QRF) rate.
  • Design and theoretical analysis of a QRF polyhedron with anisotropic and zero-Poisson's ratio properties.
  • Simulation and analysis of the QRF polyhedron's suitability for arraying as morphing surfaces.

Main Results:

  • The QRF rate effectively quantifies the rigid-foldability of foldable structures.
  • The proposed QRF polyhedron exhibits significant anisotropy and a zero-Poisson's ratio.
  • The QRF polyhedron can be arrayed into morphing surfaces without collisions or gaps, ensuring geometric integrity.

Conclusions:

  • The QRF polyhedron represents a significant advancement in artificial morphing surface technology.
  • This innovation overcomes key limitations of soft morphing materials, enabling practical applications.
  • The QRF polyhedron's unique properties open new possibilities in areas such as electromagnetic wave manipulation, robotics, and adaptive grippers.