Planes like Teeth = Stronger, Self-Healing


Categorie: Air, David Axe, Research |



In June, the U.S. Air Force flew a new experimental plane. The Advanced Composite Cargo Aircraft combines the front section of a Dornier 328 freighter with a brand-new aft section made from special composite materials. The idea was to assemble a plane from big, pre-shaped composite pieces, in order to reduce the total number of parts from 3,000 to just 300. In theory, this makes the aircraft stronger, as planes tend to “break” at the joins between major structural pieces.

Imagine a near future where planes are assembled using just a handful of parts. Imagine farther in the future, where one-piece planes are “grown” or die-cast from special materials. It’s not so far-fetched, according to one scientist. Herzl Chai, a professor in Tel Aviv, is studying human teeth to understand how they stay so strong over decades. He hopes to one day build airplanes the same way.

“Teeth exhibit graded mechanical properties and a cathedral-like geometry, and over time they develop a network of micro-cracks which help diffuse stress,” Chai told “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.”

One-piece, tooth-like planes would actually get stronger over their very, very long lifetimes. Ideally, you’d build an all-but-eternal airframe, and swap out new electronics and engines every few years or decades.

(Photo: Air Force)


One Response to “Planes like Teeth = Stronger, Self-Healing”

  1. 111 says:

    Looks like someone in JI is not reporting for duty anytime soon.

    MANILA (Reuters) – The Philippines said Tuesday it had eradicated a group of Muslim militants with links to the notorious Abu Sayyaf rebels after the arrest of its top leader suspected to be part of a 2006 plot to bomb Western embassies.

    “We believe that his group is already obliterated,” national police chief Jesus Verzosa said, referring to Rajah Solaiman Movement (RSM), a small group known for bomb attacks in the capital and in the southern island of Mindanao.

    RSM, with less than 50 members, has close links with the al Qaeda-affiliated Abu Sayyaf, the deadliest Muslim rebel group in the Philippines.

    Dinno-Amor Pareja, 28, also known as Khalil and Abu Jihad, did not resist arrest when law enforcement teams stormed his hideout in Marawi City on Mindanao last Friday, Verzosa told reporters.

    Pareja, who is also on the wanted list of the U.S. treasury department, assumed the leadership of the RSM group in 2005 when its two top leaders and organizers were arrested.

    Verzosa said Pareja helped plan attacks on the embassies of the United Kingdom, United States and Israel in Manila and during the meetings of the Association of South East Asian Nations (ASEAN) in Cebu City in the central Philippines in 2006.

    Security forces foiled the plots after 600 kg of explosives were seized in a raid in a Manila suburb. But they failed to arrest Pareja who sought refuge in Muslim rebel bases in Mindanao.

    Police escorted a handcuffed Pareja to a detention facility in a police camp in the capital Tuesday, hours after he was flown in from the southern Philippines.

    Pareja is also facing rebellion and murder charges for a February 2005 commuter bus bombing that killed three people and wounded dozens in Manila’s main business district.

    Last year, Pareja was among seven RSM leaders tagged as terrorists by the U.S. Treasury Department and was added to the United Nations’ terrorism list of people and entities associated with Osama bin Laden and al Qaeda.

    (Reporting by Manny Mogato; Editing by Rosemarie Francisco)

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