a-1. Origami-based Deployable Structure for 3D Volumetric Applications


Principal Investigator: Jae-Hung Han
Participated Graduate Research Assitant: Jong-Eun Suh, Tae Hyeun Kim
Related Projects:  NLS, LIG Nex1


Related Recent Publication:
[1] Suh, J.-E., Kim, T.-H., and Han, J.-H., “New Folding Concept on the Cylindrical Structure with Yoshimura Pattern: Folding pattern analysis,” AIAA SciTech Forum 2020, Orlando, Florida, USA, Jan. 06-10, 2020.
[2] Suh, J.-E., Kim, T.-H., and Han, J.-H., “A New Approach to Folding a Thin-Walled Yoshimura Patterned Cylinder,” Journal of Spacecraft and Rockets, 2020 (Submitted)


1. Goal

– Development of 3-D deployable structure inspired by the origami pattern

2. Approaches

– Analyses using ANSYS Workbench Mechanical

▶ Static analyses for various origami structures were performed under the axial folding condition

▶ Every contact condition is assumed to linear contact such as bonded or no separation

▶ Numbers and size of the mesh is selected by considering the result of the convergence test

– Mathematical modeling of various configurations with MATLAB

▶ A certain problem is defined and mathematically solved to obtain various configurations during the folding process of the origami-based deployable structures.

▶ The kinematic modeling of the Yoshimura cylinder is modeled based on the principle of minimum potential energy.

▶ MATLAB is used for the calculation of potential energy & force-displacement relationship.

– Prototyping and demonstration with handy materials (Cardboard, PET, etc)

▶ Fast prototyping using a laser cutter and 3-D printer.

▶ Demonstration of the deployment & folding of the structure with prototypes.

3. Recent Achievements

– A new folding methodology for the Yoshimura cylinder is developed.

▶ Much efficient (inducing less stress and requiring less force) folding methodology is developed for the Yoshimura cylinder..

▶ The effectiveness of the proposed folding methodology is confirmed through the static analysis using ANSYS.

▶ This folding methodology could be a foundation for the 3-D deployable structure with Yoshimura pattern.

fig1

Fig.1 Folding sequence of the Yoshimura cylinder following the proposed folding methodology

fig2

Fig.2 Equivalent von Mises stress contour plot for (a) Operational configuration, (b) Foldable configuration (Triangular cross-section), and (c) Foldable configuration (Rectangular cross-section) under the axial compression

– Numerous intermediate configurations for the proposed folding methodology were identified.

▶ A “Route-finding” problem is established based on the folding of the origami pattern.

▶ All the possible intermediate configurations are identified with respect to the design parameters of the Yoshimura cylinder by solving “Route-finding” problem.

▶ The effectiveness of the “Route-finding” approach and the feasibility of the proposed folding methodology is confirmed through the demonstration with paper models.

fig3

Fig.3 The correspondence between the ideal folding pattern and return path

fig4

Fig.4 (a) Operational configuration, and two different folded configurations using the ideal folding patterns of (b) Candidate #1 and (c) Candidate #2

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