Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
Zetix Blast Resistant Fabric Has Other Uses
Zetix is a remarkable fabric from Auxetix Ltd; it can resist multiple bomb blasts without tearing. It is a member of a class of fabrics called auxetics that actually become thicker when stretched out.
(Principle of auxetics demonstrated)
The idea that a material could become thicker when stretched out is contrary to our usual experience with objects that stretch. The illustration show above explains how it works. For example, a plain bungee cord will indeed get thinner when stretched. However, if you entwine it with a stiffer cord, and then stretch out the two together, the stiffer white-colored cord becomes taut, while the bungee cord wraps around it. The pair of cords are thicker. Finally, bundle a group of these pairs together; now you've got an auxetic structure.
Now, imagine a fabric that uses this same principle at a much smaller level; when you stretch the fabric, it actually thickens up.
(Comparison of Zetix with conventional blast-proof materials)
When this principle is applied to protective fabrics like those shown below, the results are dramatic. Most blast-resistant materials fail when exposed to the energy of a explosive blast. However, the Zetix material thickens to resist the blast, and then returns to its earlier state.
Besides giving hope to would-be superheroes everywhere for a super-suit (see Skiers Get 'Impact Suits' and Scientific Proof For Superhero Tights for related news), this kind of material has a surprising number of applications:
- Seat Belts
In an accident, the passenger is usually thrown forwards, and if the deceleration is particularly dramatic, the forces involved can be enormous. In attempting to restrain this movement, the seat belt gets stretched and, much like an elastic band being pulled, becomes narrower. This is exactly the opposite of the behaviour that you want at such a critical time, for, in getting narrower, it concentrates all the forces into a much smaller area. - Construction - Concrete Reinforcement
Conventional reinforcements that are used in concrete structures suffer from the fact that as they are loaded in tension, they get thinner. This causes a de-bonding effect, where the reinforcing rod pulls away from the surrounding concrete. - Health - Dental Floss
Auxetic dental floss offers several key benefits, including the ability to expand to fit the widely differing gaps between human teeth and the ability to deliver chemotherapeutics, fluorides or flavours directly to the gum line. - Manufacturing - Filtration
When a conventional net-like material is stretched, the holes close up, whereas in an auxetic version the holes open up. This can be exploited to create a range of objects where controlling the hole size may be important. This could be particularly significant in the industrial filtration market. - Aerospace - Smart Sensors
Smart sensors can be used in a variety of composite structures as in-situ monitoring devices. One of the problems with conventional structures is that when they experience loads or shocks that may have weakened or damaged them, there is rarely any satisfactory method of assessing their integrity. The novel sensors being developed at Auxetix provide much higher signal resolution whilst providing a range of other benefits at the same time.
Materials science is becoming more futuristic every day:
- UM's New Ultrastrong Nanocomposite
Nifty new material built in layers like mother of pearl has the strength, if not the ductility, of steel. - Ice-Nine Modeled In Harvard Computer - We're Doomed
It's not quite the world-ending material from Kurt Vonnegut's novel, but Harvard researchers really do think they have found a way for ice to be solid at room temperature. - Self-Healing Polymer Autonomous Material System
Everywhere you look, exposed surfaces are cracking. What if you could have a surface that repaired itself?
Via Zetix Blast-Proof Fabric; lots of good information at the Auxetix website. Also, find more details about auxetics materials.
Scroll down for more stories in the same category. (Story submitted 12/7/2007)
Follow this kind of news @Technovelgy.| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
Would
you like to contribute a story tip?
It's easy:
Get the URL of the story, and the related sf author, and add
it here.
Comment/Join discussion ( 0 )
Related News Stories - (" Material ")
Goldene - A Two-Dimensional Sheet Of Gold One Atom Thick
'Hasan always pitched a Gauzy - a one-molecule-layer tent, opaque, feather-light, and very tough.' - Roger Zelazny, 1966.
GNoME AI From DeepMind Invents Millions Of New Materials
'...the legendary creativity of our finest human authors pales against the mathematical indefatigability of GNoME.'
Omniphobic Liquid-like Surfaces And de Camp's Telelubricator (1940)
'So the surface, to the depth of a few molecules, is put in the condition of a supercooled liquid as long as the beam is focused on it.' - L. Sprague de Camp, 1940.
MXenes - Atomic-Thin Metal Sheets Now Easier To Make
'...a rolled-up sheet of a thin, dark metal strange to them.' - John Edwards, 1934.
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Biohybrid Robots Made Of Living And Synthetic Materials
'If the biological robots were not living creatures, they were certainly very good imitations.'
Drug Induces Hibernation-Like State In Humans
'... drugged and chilled and stowed in sleep tanks.'
Poul Anderson's 'Brain Wave'
"Everybody and his dog, it seemed, wanted to live out in the country; transportation and communication were no longer isolating factors."
AI Note-Taking From Google Meet
'... the new typewriter that could be talked to, and which transposed the spoken sound into typed words.'
Qore IcePlates Are Personal Cooling Suits
'... underneath they consisted of networks of cooling tubes against the skin.'
P1 Just The Latest Robot To Take A Beating From Humans
'...we mere people come second.'
Waymo Cars Shout At Each Other, Autonomously
'My cars talk to one another. I have no doubt about it...'
Your Solar Electric Paint Is Ready, Larry Niven
'...you spray it on.'
How Long Till We Have These Tattoos?
Truth or fiction?
Seeing Faces On Grains Of Sand (AI Pareidolia)
'... the imprint of her image on the telephoto cell.'
Lunar Biorepository Proposed For Cryo-Preservation Of Earth Species
'...there was no one alive who had ever seen them. But they existed in the Life Bank.'
Tele-Driving Offers Jobs For Tele-Drivers, Not AIs
''...some bored drone pusher in a remote driving centre...'
Autonomous Robotic Dentist - Would You Say 'Ahhh'?
You might be surprised at how much more efficient this could be.
GM Scraps Cruise Origin Robotaxi With No Steering Wheel
'Ames tinkered around with something on the instrument board when he got in; and in a few moments we were off.'
Taza Aya Air-Curtain Tech Protects Turkey Workers
'I'm going to have to buy a filter-mask.'
Torobo Humanoid Robot Hammers A Nail
7-axis dual arms, 3-axis waist (pitch, pitch, yaw), 3-axis neck (yaw, pitch, roll), and 4-axis undercarriage!
