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Current issue

ELEKTRO 5/2019 was released on May 15th 2019. Its digital version will be available imediately.

Topic: Lightning and overvoltage protection; Fire and safety technologies

Main Article
Verification of material coefficient defined in the standard STN EN 62305-3
Smart Cities (final part 10)

SVĚTLO (Light) 2/2019 was released on March 15th 2019. Its digital version will be available immediately.

Architectural and scenic lighting
The architectural lighting of Bečov nad Teplou castle
Lighting design in a nutshell – Part 41
The analyse of light picture a little more theoretic

Day light
Biggest mistakes in day lighting design of buildings

New metamaterial can switch from hard to soft

25.01.2017 | University of Michigan | ns.umich.edu

When a material is made, you typically cannot change whether that material is hard or soft. But a group of University of Michigan researchers have developed a new way to design a “metamaterial” that allows the material to switch between being hard and soft without damaging or altering the material itself.

Metamaterials are man-made materials that get their properties—in this case, whether a material is hard or soft—from the way the material is constructed rather than the material that constructs it. This allows researchers to manipulate a metamaterial's structure in order to make the material exhibit a certain property.

New metamaterial

In the group's study the U-M researchers discovered a way to compose a metamaterial that can be easily manipulated to increase the stiffness of its surface by orders of magnitude—the difference between rubber and steel. The material could one day be used to build cars or rocket launch systems. In cars, the material could help absorb impacts from a crash. The researchers also suggest the material could be used to make bicycle tires that could self-adjust to ride more easily on soft surfaces such as sand, or to make damage-resistant, reusable rockets.

Read more at University of Michigan

Image Credit: Adobe Stock

-jk-