Tooth Enamel Secret To Stronger Aircraft
Aerospace engineers are brushing up on their knowledge of tooth enamel. It turns out that teeth and aircraft materials have something in common. Professor Herzl Chai of Tel Aviv University's School of Mechanical Engineering and his colleagues at National Institute of Standards and Technology and George Washington University have published research on how the structure of teeth holds useful clues for aerospace engineers.
"Teeth are made from an extremely sophisticated composite material which reacts in an extraordinary way under pressure," says Prof. Chai. "Teeth exhibit graded mechanical properties and a cathedral-like geometry, and over time they develop a network of micro-cracks which help diffuse stress. This, and the tooth's built-in ability to heal the micro-cracks over time, prevents it from fracturing into large pieces when we eat hard food, like nuts."
In teeth, fibers aren't arranged in a grid, but are "wavy" in structure. There are hierarchies of fibers and matrices arranged in several layers, unlike the single-thickness layers used in aircrafts. Under mechanical pressure, this architecture presents no clear path for the release of stress. Therefore, "tufts" — built-in micro cracks — absorb pressure in unison to prevent splits and major fractures.
Aerospace engineers already use a variety of composite materials in the construction of aircraft. Composites consist of two or more materials (matrix and reinforcement) combined to give a material with properties distinct from the original constituents. They may be naturally occurring, or they may be synthetic.
(Composite materials in aircraft)
Although the use of composite materials is as old as engineering, science fiction writers have championed unusual ideas about the use of natural materials in the creation of sophisticated technological constructions. For example, in his 1989 novel Hyperion, Dan Simmons writes about mighty treeships that are used to travel between the stars.
The Consul remembered his first glimpse of the kilometer-long treeship as he closed for rendezvous, the treeship's details blurred by the redundant machine and erg-generated containment fields which surrounded it like a spherical mist, but its leafy bulk clearly ablaze with thousands of lights which shone softly through leaves and thin-walled environment pods, or along countless platforms, bridges command decks, stairways and bowers. Around the base of the treeship, engineering and cargo spheres clustered like oversized galls while blue and violet streamers trailed behind like ten kilometer-long roots...
From Flying by the Skin of Our Teeth .
Scroll down for more stories in the same category. (Story submitted 8/25/2009)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 1 )
Related News Stories -
New Paper - Write With Light Erase With Heat
Writing with light, erasing with heat.
Reconfigured Graphene 10X Strong, 5 Percent Dense, As Steel
'...It was made of Alohydrolium, which is the lightest of all metals.' - Hugo Gernsback, 1911.
MIT's aeroMorph Technology
'... It falls into that structure like a rubber figure returning to shape.' - Samuel R. Delany, 1966.
Russia's Protective Ferrite Fabric
'His suit-shield sucked in the energy and discharged it...'- Philip K. Dick, 1954.
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.
PassivDom 3D Printed House - What If You Could Live Anywhere?
'The houses are prefabricated units...'
Breakthrough In Manufacture Of Red Blood Cells
This blood's for you!
Caihong Solar-Powered Drone 'Atmospheric Satellite'
'... placed in the wings of a plane to generate power from the light falling on that surface.'
NASA Wants Low Earth Orbit Wifi
'This was the center of Interplanetary Communications.'
Is Genetic Testing At Businesses A Bad Idea?
It's not a topic that fares well in science fiction movies-
Wearable Smart Jacket
He pressed the button in his sleeve communicator and snapped: 'Action stations!'
Store One Bit On One Atom
'...each individual molecule has a meaning.'
Fluorescent Bacteria Fashion
'The racks of gowns itched and quivered, their colors running into blurred pools.'
Keith Laumer's Bolo Autonomous Tanks Right On Schedule
'I cannot lie idle under attack.'
When Computers Develop Their Own Language, Will They Talk To Us?
'The curious absent look of a robot talking on the TBR circuits - the Talk Between Robots radio...'
LipNet Reads Lips - Until Disconnected, That Is
'We'd have to cut his higher brain functions... I'm not sure what [HAL} would think about that.'
Eterni.me - To Skype With The Dead
'Nothing... left of Jeserac but a galaxy of electrons frozen in the heart of a crystal.'
Wearable MRI Is Former Occulus/Facebook Exec's New Project
'Your cephalochromoscope... that you always turn on and play when you get home...'
Ford Stratasys Infinte Build 3D Printer
'He proudly indicated his Buick... Almost as good as the original it was printed from...'
The Space Suit As Personal Spaceship
'Darn clever, these suits...'
Dune Fans! Your God Emperor Is Ready
'If one held a sandtrout in the hand, smoothing it over your skin, it formed a living glove.'
More SF in the News Stories
More Beyond Technovelgy science news stories