Researchers design 3D kirigami building blocks to create dynamic metamaterials

Credits: North Carolina State University

A new approach to creating metamaterials utilizes the technique of kirigami to create 3D reconstructable building blocks that can be used to create complex and dynamic structures. Due to the modular design approach, these structures are easy to assemble and disassemble.

“Paint the kirigami on Three-dimensional material It provides a new level of reconfigurability for these structures, “said the corresponding author of the paper on this study, Machinery and Machinery. Aerospace engineering At North Carolina State University.

Researchers are optimistic about these 3Ds Metamaterial It can be used in applications such as lightweight building materials for buildings, modular robotics components, and waveguides for acoustic metamaterials.

Kirigami is a variation of origami that cuts paper in addition to origami. Kirigami is created using two-dimensional materials such as paper, but Yin and his collaborators applied the principle of kirigami to three-dimensional materials cut into connected cubes. ..

Specifically, researchers modeled a new approach using a series of eight connected cardboard cubes that are open on both sides. Each unit of 8 connected cubes building block. Depending on how the cubes are interconnected, these building blocks can be folded into over 300,000 different designs.

“Think of these kirigami units as versatile building blocks that can be assembled to create larger structures with different mechanical properties,” says Yin. “In addition, larger structures can be disassembled, so users Kirigami Unit to new structure. “

To demonstrate the usefulness of the concept, researchers have created more than a dozen reconfigurable ones. Building block.. Each block consists of eight connected paper cubes that can be reconstructed into eight different shapes. The video shows how to reconstruct each unit into a different structure, how to assemble those structures into a larger structure, and how to disassemble the assembled large structure back into a reconfigurable block. (You can watch the video at the top of the page.)

It depends on the orientation of the solid cube walls and open sides of each block and the placement of each larger block. Construction, The behavior of the structure is different. This allows the user to adjust the mechanical properties of each building block. For example, a single building block can be folded into a structure that can be easily compressed, or it can be folded into another shape that can withstand heavy loads.

“The fact that these 3D metamaterials can be decomposed and reconstructed allows users to modify the mechanical properties of the structure as needed to perform a variety of tasks,” says Yin. “One way to fold it to make it easier to compress, another way to fold it to move it sideways, and a third way to fold it to increase stiffness and strength.

“This work focused on showing the basic concept,” says Yin. “The next step is to demonstrate an application with this concept.”

The paper “3D Transformable Modular Kirigami-Based Programmable Metamaterials” was published in the journal. Advanced functional materials..

Researchers make robots from self-folding kirigami material

For more information:
Yanbin Li et al, 3D Transformable Modular Kirigami Based Programmable Metamaterials, Advanced functional materials (2021). DOI: 10.1002 / adfm.202105641

Quote: Researchers have obtained dynamic metamaterials from on August 9, 2021 (2021, August). 9th) Design a 3D Kirigami Building Block to create. html

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Researchers design 3D kirigami building blocks to create dynamic metamaterials

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