News tagged with fractures
Study links ultrafast machine trading with risk of crash
(PhysOrg.com) -- In the United States, ultrafast trading in financial markets between 2006 and 2011 was the underlying factor for over 18,000 extreme price changes, according to a new study. Neil Johnson, ...
Feb 19, 2012 |
4.6 / 5 (14) |
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Methane levels 17 times higher in water wells near hydrofracking sites
A study by Duke University researchers has found high levels of leaked methane in well water collected near shale-gas drilling and hydrofracking sites. The scientists collected and analyzed water samples from 68 private ...
May 09, 2011 |
4.4 / 5 (12) |
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Study ties oil, gas production to Midwest quakes
Oil and gas production may explain a sharp increase in small earthquakes in the nation's midsection, a new study from the U.S. Geological Survey suggests.
Space & Earth / Earth Sciences
Apr 07, 2012 |
3.8 / 5 (12) |
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First ever single crystal metallic glass created under 25 gigapascals of pressure
Glass, by definition, is amorphous; its atoms lack order and are arranged every which way. But when scientists squeezed tiny samples of a metallic glass under high pressure, they got a surprise: The atoms ...
Jun 16, 2011 |
4.9 / 5 (8) |
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'Hydraulic fracturing' mobilizes uranium in marcellus shale
Scientific and political disputes over drilling Marcellus shale for natural gas have focused primarily on the environmental effects of pumping millions of gallons of water and chemicals deep underground to ...
Oct 25, 2010 |
4.8 / 5 (8) |
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EPA theorizes fracking-pollution link
(AP) -- The U.S. Environmental Protection Agency announced Thursday for the first time that fracking - a controversial method of improving the productivity of oil and gas wells - may be to blame for causing ...
Dec 09, 2011 |
4.9 / 5 (7) |
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How close is too close? Hydrofracking to access natural gas reservoirs poses risks to surface water
Natural gas mining has drawn fire recently after claims that hydraulic fracturing, an increasingly popular technique for tapping hard-to-reach reservoirs, contaminates groundwater. Surface lakes, rivers and streams may also ...
Oct 18, 2011 |
4.3 / 5 (6) |
3
Reproductive problems, death in animals exposed to fracking
(PhysOrg.com) -- A new report has found dozens of cases of illness, death and reproductive issues in cows, horses, goats, llamas, chickens, dogs, cats, fish and other wildlife, and humans. It says these conditions could be ...
Mar 08, 2012 |
4.3 / 5 (6) |
2
Bridge destruction to reveal clues about 'fracture-critical' spans
A civil engineer at Purdue University is taking advantage of the demolition of a bridge spanning the Ohio River to learn more about how bridges collapse in efforts to reduce the annual cost of inspecting large ...
Jul 28, 2011 |
4.8 / 5 (5) |
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EPA targets air pollution from gas drilling boom
(AP) -- Faced with a natural gas drilling boom that has sullied the air in some parts of the country, the Environmental Protection Agency on Thursday proposed for the first time to control air pollution at oil and gas wells, ...
Jul 29, 2011 |
4.2 / 5 (5) |
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Study shows air emissions near fracking sites may impact health
In a new study, researchers from the Colorado School of Public Health have shown that air pollution caused by hydraulic fracturing or fracking may contribute to acute and chronic health problems for those living near natural ...
Mar 19, 2012 |
4.2 / 5 (5) |
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Scientists develop method for determining diet of our early ancestors
(PhysOrg.com) -- Were our early mammalian ancestors vegetarians, vegans or omnivores? It's difficult for anthropologists to determine the diet of early mammalians because current fossil analysis provides too ...
Other Sciences / Archaeology & Fossils
Sep 16, 2010 |
4.5 / 5 (4) |
0
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Researchers challenge study on hydrofracking's gas footprint
(PhysOrg.com) -- A Cornell study's contention that hydraulic fracturing would be worse for climate change than burning coal is being challenged by another study, also by Cornell researchers.
Mar 05, 2012 |
4.5 / 5 (4) |
6
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US gas well contained, but concerns rise on 'fracking'
Crews in Pennsylvania gained control Friday of a natural gas well that blew out and spilled thousands of gallons of chemical-laden drilling fluid into the environment over two days.
Apr 22, 2011 |
4.3 / 5 (4) |
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Amid US gas boom, split over environment risks
The United States is seeing a natural gas boom thanks to discoveries of abundant shale gas, and at the same time a groundswell of opposition from critics who say the environmental risks from drilling are too ...
Jun 26, 2011 |
4 / 5 (4) |
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Fracture
A fracture is the (local) separation of an object or material into two, or more, pieces under the action of stress.
The word fracture is often applied to bones of living creatures (that is, a bone fracture), or to crystals or crystalline materials, such as gemstones or metal. Sometimes, in crystalline materials, individual crystals fracture without the body actually separating into two or more pieces. Depending on the substance which is fractured, a fracture reduces strength (most substances) or inhibits transmission of light (optical crystals).
A detailed understanding of how fracture occurs in materials may be assisted by the study of fracture mechanics.
For more information about Fracture, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
