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Double-Layer Self-Locking Origami Based on Opposite Folding Motion.

Jae-Kyeong Kim1,2, Se Hyeok Ahn1,2, Sun-Pill Jung1,2

  • 1Department of Mechanical Engineering/Institute of Advanced Machines and Design, Seoul National University, Seoul, Korea.

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Summary
This summary is machine-generated.

This study introduces a novel origami technique using two layers with opposite folding motions. This method significantly enhances bending stiffness in reconfigurable 3D structures, enabling robust transformations.

Keywords:
arm support devicebending stiffnessfurnitureorigamiself-lockingsheltersoft robotics

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Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Robotics

Background:

  • Origami structures offer lightweight and reconfigurable designs by folding 2D facets into 3D shapes.
  • A key challenge in origami engineering is maintaining or increasing bending stiffness in transformed 3D configurations, especially for thin facets prone to bending.
  • Angled arm shapes are crucial components in various reconfigurable systems but are particularly susceptible to stiffness loss during transformation.

Purpose of the Study:

  • To develop a novel origami-based method for enhancing the bending stiffness of reconfigurable 3D structures.
  • To address the inherent challenge of stiffness reduction during origami transformations.
  • To create transformable structures with high load-bearing capacity from initially flat configurations.

Main Methods:

  • A new origami technique was developed by combining two layers designed with opposite folding motions.
  • This approach induces interlocking through counteracting movements in the cross-sectional direction during axial bending.
  • The method was applied to develop prototypes including an arm support device, furniture, and a shelter.

Main Results:

  • The proposed method successfully increased the bending stiffness of origami structures.
  • The interlocking mechanism effectively counteracted the tendency for stiffness reduction during transformation.
  • Developed prototypes demonstrated the ability to transform from flat states into robust 3D shapes with high load-bearing capacity.

Conclusions:

  • The dual-layer origami approach with opposite folding motions is an effective strategy for achieving high bending stiffness in reconfigurable structures.
  • This technique overcomes a critical limitation in traditional origami engineering, enabling the creation of transformable structures with enhanced mechanical properties.
  • The developed applications highlight the potential of this method for creating adaptive and load-bearing systems.