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Latest Granular material Stories

Asteroid Surface More Unstable Than Previously Thought
2013-07-05 12:02:49

Lee Rannals for redOrbit.com - Your Universe Online An experiment in microgravity has revealed future missions seeking to land on an asteroid may have to watch out for an avalanche. Researchers discovered the rubble and dust covering asteroids and comets could feel changes between particles over much larger distances than on Earth, making these surfaces much less stable than previously thought. "We see examples of force-chains everywhere. When you pick an orange from a pile in a...

New Terradynamics Technique Helps Robots Walk Through Sand
2013-03-22 20:41:39

Lee Rannals for redOrbit.com — Your Universe Online "Terradynamics" could be the next big thing in robotics, helping robots move on granular and other complex surfaces like beaches. Studying the field of terradynamics involves researching and understanding how small-legged robots move on and interact with complex materials like sandy beaches. The team who coined the name terradynamics wrote about their achievements in the field in the journal Science. "We now have the tools to...

3D Printing Used To Test Complex Qualities Of Shapes Made With Computer
2013-03-19 10:32:18

The University of Chicago [ Watch The Video Finding the Strongest Shapes with 3D Printing ] Prof. Heinrich Jaeger´s research group examines materials and phenomena that appear simple at the surface, but which reveal tremendous complexity upon close examination. One such phenomenon is jamming, in which aggregates of randomly placed particles, including spheres or more complicated shapes, or even molecules, transition from fluid-like to solid-like behavior. Jamming lends itself to...

Grains Cause Meteorite Impact Waves To Spread Unevenly
2012-12-12 13:06:31

April Flowers for redOrbit.com - Your Universe Online Scientists at Duke University have gained a new microscopic picture of the way the energy of a meteorite or a missile transfers to sand and dirt grains by observing high-speed video of projectiles slamming into a bed of disks. The study, published in Physical Review Letters, showed that the transfer is jerky, not smooth as the researchers believed it would be. "It was surprising just how un-smooth the slow-down of the intruding...

New Research Depicts Precisely How Sand Flows
2012-04-10 04:53:35

Lee Rannals for RedOrbit.com New research from the Massachusetts Institute of Technology (MIT) may have an impact in a range of industries, from engineering to pharmaceutical manufacturing. Ken Kamrin of MIT's Department of Mechanical Engineering has created a model that predicts the flow of granular materials under a variety of conditions. Sand's behavior, which is part fluid, part solid, has made it difficult for researchers to predict how it and other granular materials flow under...

2011-12-14 19:53:26

Discovery may be boon to engineers, manufacturers A stroll on the beach can mean sinking your toes into smooth sand or walking firm-footed on a surface that appears almost solid. While both properties are commonplace, exactly what it is that makes granular materials change from a flowing state to a “jammed,” or solid, state? Whether it´s sand on a beach or rice grains in a hopper, being able to predict the behavior of granular matter can help engineers and manufacturers of...

2011-12-14 19:42:38

It's easy to get in a jam. But it's much harder to explain exactly how or when it started. Scientists still aren't sure what causes clogs in flowing macroscopic particles, like corn, coffee beans and coal chunks. But new experiments by Duke physicist Robert Behringer and his colleagues suggest that when particles undergo a force called shear strain, they jam sooner than expected. The results appear in the Dec. 15 issue of Nature. Shear strain is sort of like cupping sand between your...

2009-06-30 15:44:53

University of Chicago researchers have discovered dry granular materials such as sand, seeds and grains have properties similar to liquid. The physicists from the university's Materials Research Science and Engineering Center said the granular materials form water-like droplets when poured from a given source. The researchers said their finding could be important to a wide range of industries that use fluidized dry particles. It was previously thought dry particles lacked sufficient surface...

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2009-06-24 13:25:00

University of Chicago researchers recently showed that dry granular materials such as sands, seeds and grains have properties similar to liquid, forming water-like droplets when poured from a given source. The finding could be important to a wide range of industries that use "fluidized" dry particles for oil refining, plastics manufacturing and pharmaceutical production.Researchers previously thought dry particles lacked sufficient surface tension to form droplets like ordinary liquids. But,...

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2009-02-10 10:28:36

Today's advanced mobile robots explore complex terrains across the globe and even on Mars, but have difficulty traversing sand and other granular media like dirt, rubble or slippery piles of leaves. A new study published February 10 in the journal Proceedings of the National Academy of Sciences takes what may be the first detailed look at the problem of robot locomotion on granular surfaces. Among the study's recommendations: robots attempting to move across sandy terrain should move their...


Word of the Day
bodacious
  • Remarkable; prodigious.
  • Audacious; gutsy.
  • Completely; extremely.
  • Audaciously; boldly.
  • Impressively great in size; enormous; extraordinary.
This word is probably from the dialectal 'boldacious,' a blend of 'bold' and 'audacious.'
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