Cotton thread is made of many tiny fibers, each just 2-3 cm long, yet when spun together the fibers are capable of transmitting tension over indefinitely long distances. From a physics perspective, how threads and yarns transmit ...
Researchers at Pacific Northwest National Laboratory have developed and successfully tested a novel process - called Friction Stir Dovetailing - that joins thick plates of aluminum to steel. The new process will be used to ...
Materials Science
Apr 13, 2018
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172
Friction is created when two surfaces slide one on top of the other. Since this consumes additional energy, this so-called sliding friction is considered an irksome yet inevitable aspect of dynamic processes. However, to ...
Condensed Matter
Mar 29, 2018
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11
If a hard-boiled egg is spun fast enough on a table, it will slowly stand upright as it continues to spin. Although the spinning egg rises due to the force of friction between the egg and the table, the full explanation involves ...
The wetting and adhesion characteristics of solid surfaces critically depend on their fine structures. However, until now, our understanding of exactly how the sliding behaviour of liquid droplets depends on surface microstructures ...
Condensed Matter
Feb 22, 2018
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10
Scientists of the Department of Energy's Light Water Reactor Sustainability Program (LWRS) and partners from the Electric Power Research Institute (EPRI) have conducted the first weld tests to repair highly irradiated materials ...
Engineering
Feb 8, 2018
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146
Whether a fluid is flowing through household plumbing or industrial oil and gas pipelines, when it runs slowly its flow is smooth, but when it runs quickly its flow is more chaotic.
Soft Matter
Feb 1, 2018
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10
(Phys.org)—A team of researchers working at the Max Planck Institute for Polymer Research has found through experimentation that friction in sliding drops is similar in some ways to that of solid objects. In their paper ...
Transitions occurring in nanoscale systems, such as a chemical reaction or the folding of a protein, are strongly affected by friction and thermal noise. Almost 80 years ago, the Dutch physicist Hendrik Kramers predicted ...
Quantum Physics
Oct 24, 2017
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22
New research from North Carolina State University, MIT and the University of Michigan finds that the surface texture of microparticles in a liquid suspension can cause internal friction that significantly alters the suspension's ...
General Physics
Oct 12, 2017
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150
