By utilizing 3D-printed fashions and dropping them right into a tank, researchers have discovered the utmost heights individuals can dive from earlier than they’ll encounter forces that may trigger harm


27 July 2022

A 3d-printed model enters the water

3D-printed fashions reveal the forces skilled when diving

Anupam Pandey, Jisoo Yuk, and Sunghwan Jung at Cornell College

How excessive would you dare to dive from? An experiment with 3D-printed fashions has found how excessive individuals can leap from into water with out severe danger of harm.

Sunghwan Jung at Cornell College in New York and his colleagues studied the forces skilled when slamming into water by dropping 3D-printed fashions representing totally different human postures right into a tank. One represented an individual diving head first with their palms by their sides, one an individual with their palms above their head and their palms touching, and one other was only a leg with a foot representing leaping in toes first. Every mannequin was geared up with a pressure sensor and was filmed with a high-speed digicam when dropped.

To find out unsafe heights for diving, the researchers in contrast the forces they recorded to these recognized to trigger bodily harm to individuals. They discovered that these pressure ranges had been met for head-first divers above eight metres, hands-first divers above 12 metres and foot-first divers above 15 metres.

Jung says that almost all pressure affecting the physique whereas diving is as a result of displacement of water. It’s like pushing your fingers in a short time right into a jar of honey – the liquid forcefully resists, he says.

Individuals have efficiently dived from a lot increased heights than the boundaries discovered within the examine. For instance, Laso Schaller broke the file for the very best feet-first dive in 2015 when he jumped from 58.eight metres above water. Jung says that to execute such excessive jumps with out harm, divers should flex the proper muscle groups to make their our bodies stiffer and tighter.

Head and neck accidents usually occur when dives go mistaken, and shoulder and decrease again accidents are frequent in divers extra usually, says Nathaniel Jones on the Loyola College Medical Heart in Illinois. “Springboard divers common 100 to 150 dives per day and platform divers 50 to 100 dives per day. Doing so many dives places them in danger by way of a number of harm alternatives,” he says.

Jung says that his staff desires to experiment with in a different way formed fashions for dives into snow reasonably than water, equivalent to people who some foxes carry out.

Journal reference: Science Advances, DOI: 10.1126/sciadv.abo5888

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