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Folding photopolymerized origami sheets by post-curing.

Xiaodong He1, Christopher-Denny Matte1, Tsz-Ho Kwok1

  • 1Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montreal, Canada.

SN Applied Sciences
|January 25, 2021
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Summary
This summary is machine-generated.

This study introduces a 3D printing method for creating origami structures by selectively curing materials. This novel approach enables precise control over folding angles for complex 3D designs.

Keywords:
Digital light processingElastomerHinge designOrigamiPost-curing

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Additive Manufacturing

Background:

  • Traditional origami fabrication methods can be complex and time-consuming.
  • 3D printing offers potential for intricate and customized structures.

Purpose of the Study:

  • To develop a novel 3D printing technique for fabricating origami structures.
  • To control the folding angles of origami structures through selective curing.

Main Methods:

  • Utilizing digital light processing (DLP) 3D printing.
  • Implementing a two-step curing process: partial curing during printing and full curing post-processing.
  • Employing finite element analysis (FEA) in ANSYS to analyze stress distribution in hinge designs.
  • Developing an empirical model based on hinge width and cavity height to predict folding angles.

Main Results:

  • The two-step curing process successfully creates folded origami structures.
  • Square hinges exhibit lower maximum principal stress compared to elliptical and triangle hinges.
  • An empirical model accurately predicts the final folding angle based on selected variables.
  • Experimental verification confirms the method's validity and reliability.

Conclusions:

  • The proposed 3D printing method offers a reliable approach for fabricating complex origami structures.
  • Selective curing is an effective strategy for controlling shape deformation in 3D printed objects.
  • The study provides a foundation for designing and manufacturing advanced origami-based devices.