Well it looks like my prior experience was enough for me to get the job 😊 the manager asked if I could come with my id and SS card tomorrow afternoon. But I need black non slip shoes for work since I'll be in the kitchen. Sorry y'all I got everything else I need . Please this last thing for work. I'm excited and nervous but ready
With pop-out structures inspired by kirigami and animals, a shoe sole goes from flat to spiky to boost friction on slippery surfaces such as ice.
Cuts and folds can transform a flat piece of paper into a 3-D work of art. Such techniques can also create engineering solutions. Researchers have now used creative cuts to help shoes get a grip. With pop-out structures, the shoes’ soles go from flat to spiky as someone walks.
The new soles apply the Japanese art of kirigami. It’s like origami, but “instead of folding the flat sheet, you cut … along the specific pattern,” explains Sahab Babaee. A mechanical engineer, he uses physics and materials science to design devices. He works at the Massachusetts Institute of Technology in Cambridge. In addition to paper, kirigami can reshape sheets of wood, cloth or metal.
For their project, Babaee and his team carved a pattern of cuts into a thin, stainless steel sheet. Attached to the sole of a shoe, it stays flat as someone stands. But start to walk and the sole will bend and stretch to form structures that stick out.
The process of walking bends this creatively cut sole in a way that makes parts of it pop out. This boosts the sole’s friction with surfaces and may help prevent falls.
CREDIT: SIMO PAJOVIC
Japanese artists have long used kirigami to craft decorations, notes Jie Yin. He’s a mechanical engineer at North Carolina State University in Raleigh who had no role in the new design. Kirigami is now coming to practical applications, he says. This new sole design is “a very cost-effective way,” he says, to “potentially prevent falls.”
It was also inspired partly by nature. “What are animals doing? They cannot go to the store and buy shoes,” says Katia Bertoldi. She’s a structural engineer at Harvard in Cambridge, Mass., who was part on this project. Cheetahs sink their claws into a tree trunk to climb, she notes. But the cats pull those claws back when they’re not needed. And snakes’ scales are arranged to create friction that helps them slither. Bertoldi and her colleagues took cues from these animals in looking for designs that would boost a sole’s grip.
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