That D3O is able to double the protection of an excellent product from such a progressive company is indicative of the possibilities this material offers. Things that surpass our ability as sewing numpties. D3O is still a young company and its products are still developing. Rather than capitalizing on how thin and flexible the material is and expanding its area of coverage, D3O is making its protectors to fit into existing armor pockets.
I could do so much more if the other protectors would have been a bit larger. Home News News. Authorised and regulated by the Financial Conduct Authority, registration number By continuing to use this website you give consent for cookies to be used. For more information including how to disable cookies please visit our cookie policy. Cookies offer you the best experience of our site and improve its functionality. If you choose to block or disable them then the site may not work properly.
Website Search Search the Devitt website for more information. Published: June 20, How does it work? Check out this video of D3O in action…. What does this mean for motorcyclists? See what he has to say in this short video clip…. Related content. Leave a Comment Cancel reply Your email address will not be published. Sign up to the Keep Britain Biking newsletter. Stay up to date with the latest offers, competitions and motorcycle news.
If trapped in quicksand, the more you struggle, the faster you sink. Rather than helping you to escape, all of your thrashing about makes the quicksand less viscous, causing you to sink faster. And since its density is about twice that of a person, if you relax you will float to the top. Other types of fluids respond in the opposite way to a shear stress. If a shear stress is applied, they become more viscous. These fluids are termed shear-thickening. A mixture of corn starch and water is an excellent example of a shear-thickening fluid.
When squeezed it appears to solidify. You can run across the surface of a swimming pool filled with a mixture of corn starch and water. When making gravy, which uses corn starch, it becomes thicker when you stir it. Shear-thickening fluids can be found in your body. The synovial fluid that coats the joints in your knees and elbows is shear-thickening.
Usually, this fluid is not very viscous, so as to allow for free movement of the joints. But if you bump your knee or elbow on a sharp corner of a table the synovial fluid comes to the rescue, instantly becoming more viscous and cushioning your joint from the painful blow. It is composed of a polymer substance suspended in an oily-type liquid lubricant.
This mixture is classified as a colloid, a mixture in which the dispersed substance is permanently suspended in a dispersing medium.
Other common colloids include fog, whipped cream, and milk. When a stress is applied slowly to a shear-thickening fluid, the polymer chains have time to move out of the way and rearrange themselves, thus the viscosity is not affected. But if a quick stress is applied, the polymer chains do not have time to rearrange and they become entangled, assuming a solid-like consistency as the viscosity greatly increases.
Imagine many cars trying to quickly leave through one exit in a parking lot. If everyone is in a hurry, the cars will become ensnarled in a traffic jam.
But if the traffic exits slowly, there will be time for each car to leave in an orderly fashion. Shear-thinning fluids behave in precisely the opposite way as shear-thickening fluids. Whereas a sudden stress will cause a shear-thickening fluid to harden instantly, a more prolonged force is required to thin a shear-thinning fluid.
One of its biggest uses is in protective knee and elbow pads. The American Academy of Pediatrics has reported a doubling of the number of reported concussions among teens in the past decade, with four to 5 million concussions occurring annually.
Many helmets in use today primarily offer only impact protection, and do little to prevent the rotational acceleration that can lead to side-to-side or front-to-back movements of the brain within the skull, which can lead to concussions. Designing helmets that can reduce these types of movements is an active area of research, incorporating the fields of bioengineering, sports medicine, and materials science.
It is more effective when layered with other substances, providing a very effective barrier that prevents penetration of projectiles such as bullets and shrapnel. If this type of body armor is impacted it instantly hardens, protecting the wearer. If you drop your cell phone, a shattered screen or worse may be the end result. These cases are easily identified by the bright orange stripes on their sides. If you tend to drop your phone a lot, you may want to consider this type of case.
They can protect you from serious injury and protect your most cherished possessions. Healy, M. Los Angeles Times, Feb 17,
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