Name: Why Engineers Turned to Origami to Create Reality-Bending Metamaterials
Uploaded: 2020-03-25T02:13:53.000Z
Duration: 4 min 6 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

What you’re looking at is no standard paper crane.

But it is a breakthrough development that could one day let us reuse spacecraft, build

epic superhero suits, or even harvest energy for electronics… and it all relies on the

No, that’s not a hipster material that is obnoxiously self-referential.

A metamaterial is an artificial substance engineered to exhibit properties that we haven’t

actually found in nature... at least, so far.

They’re designed with repeating structures allowing them to direct and control the flow

of electromagnetic  or physical waves through them.

Metamaterials have incredible properties, like light-bending abilities or superconductivity,

that come from their structure – not their substance.

And that means that engineering teams, like this one at the University of Washington,

can make reality-bending properties emerge from something as simple as acrylic and paper.

This design in particular draws from the mathematical concepts of origami.

While the ancient art of paper-folding has been understood and utilized in Japan since

at least the 17th century, there are remarkably few studies about the dynamics of these complex

shapes that can fold and unfold from a two-dimensional sheet.

You might think about a Möbius strip, for example.

Take that idea one (or a few hundred) steps further, and you’ll find the principles

of origami at the core of space telescopes, deep-sea robotics, drug delivery systems,

In this case, these aeronautical engineers created a beautiful modular structure using

That stands for Triangulated Cylindrical Origami, which makes sense when you look at their shape.

Unlike other metamaterials, which typically tend to harden under compression, this structure

exhibits “strain-softening behavior.”

This essentially means that the engineers found a way to turn a compression wave—

that is, a push or heavy impact—into a tension wave—that is, a pull.

This structure, based on the way that its planes, creases, and tension points are arranged,

can LITERALLY REVERSE A PHYSICAL FORCE… using nothing more than everyday materials

If that isn’t magic, I don’t know what more you want from science.

What you can see in this 3D model is that

as the impact from the compression wave,  shown in red, “propagates”

or travels through this structure,  it creates an opposite force

ahead of it: the “tensile wave” shown in blue.

This happens so quickly that the tensile wave actually opposes the impact,

Imagine football helmets or airbags  made of this stuff.

Imagine how useful it could be in   construction areas

prone to natural disasters, like earthquakes.

Or my personal fantasy: combine this with optical metamaterials, and you have yourself

If we can find ways to efficiently convert kinetic, electromagnetic, or thermal energy

into electrical energy, we might be able to ditch conventional batteries entirely.

The conversion of one kind of kinetic energy into its opposite

And finally, one of the most exciting potential applications of this tech is recyclable spacecraft.

Since SpaceX’s Falcon 9 demonstrated that controlled re-entry, descent and landing was

in fact possible, engineers have been fascinated with the idea of reusable rockets that would

make space exploration cheaper and more accessible than ever before.

Build some landing legs out of this cootie catcher and the sustainable space race might

just blast off faster than we can imagine.

Pretty neat that an ancient craft is paving the way for incredible innovations

For more space origami, check out this episode of Focal Point on how NASA engineers created

a starshade that can fit in a rocket, but unfold to the size of a baseball field.

Don’t forget to subscribe to Seeker for all your materials science news, and let us

know in the comments below what meta-invention you’re most excited for.