Articles tagged with Friction
Researchers Ennos and Warman found that fingerprints do not increase friction between the skin and objects, contrary to a long-held theory. In fact, the ridges in fingerprints can reduce skin contact and even loosen grip, making them less useful for grip than previously thought.
A recent study published in the Proceedings of the National Academy of Sciences found that snakes use their scales to generate friction with the ground, allowing them to move efficiently. By redistributing their weight, snakes are able to maximize thrust and propel themselves forward with minimal effort.
Researchers found that snakes' belly scales provide a preferred direction of motion, making snake movement similar to wheels or ice skates. This study's findings contradict previous studies suggesting snakes push laterally against rocks and branches.
Researchers at University at Buffalo found that single-walled carbon nanotubes do not experience electromigration and thermomigration like metals, producing significantly less heat. This property makes carbon nanotubes ideal for future electronic devices, including electric cars and sophisticated naval systems.
A team of engineers from University of Wisconsin-Madison has created a new view of nanoscale friction by demonstrating that friction at the atomic level behaves similarly to friction generated between large objects. The researchers found that friction is proportional to the number of atoms that interact between two nanoscale surfaces.
Researchers at Ames Laboratory are developing nanocoatings to reduce friction and extend tool life, leading to a 31 trillion BTU annual energy savings by 2030. The coatings have shown exceptional hardness and can be applied to various industrial applications, including pumps and cutting tools.
Researchers develop new technology to analyze hair interactions, finding that mechanical and chemical changes cause rough feel. The study aims to optimize hair care product formulas by understanding how different components affect hair-to-hair interactions.
Researchers used a model to study stress changes on faults after the May 12 China earthquake and found heightened rupture likelihood for some faults. The study suggests that potential for failure exists on some faults, but does not predict when or if an earthquake will occur.
Researchers at the University of Pennsylvania discovered that diamond's slippery behavior is caused by passivation of atomic bonds, not graphite formation. The team found that friction increases dramatically in dry conditions, highlighting the importance of water vapor for optimal performance.
A recent study reveals that coating diamond surfaces with heavier hydrogen isotopes can significantly reduce friction forces. The research, led by Argonne scientist Anirudha Sumant, used single-crystal diamond surfaces coated with layers of atomic or deuterium to investigate the effect on surface vibrations.
Researchers at Penn University discovered that changing atomic mass reduces friction between sliding bodies, reducing energy loss and wear. This study provides a fundamental understanding of atomic-scale phenomena contributing to friction.
The researcher will receive a $400,000 grant to develop sophisticated computer models that can predict wear problems on various surfaces, including materials used in semiconductor and data storage devices. The study aims to understand how abrasive nanoparticles cause friction and surface wear, with potential applications in the product...
Researchers at Duke University have found that lubricin helps reduce friction and maintain joint cartilage integrity, suggesting its potential as a treatment for osteoarthritis. The study used precise measurement of biomechanical properties to compare lubricin-deficient joints to normal ones.
A team of researchers at UC Berkeley created synthetic micro-fibers inspired by geckos' remarkable hairs, which can hold a quarter to a glass slide inclined at an 80-degree angle. The fibers have high friction but low adhesion, making them suitable for applications such as shoe soles and car tires.
A team of astronomers studied the most massive and hot known fossil group, RX J1416.4+2315, to understand its formation. They found that a high-temperature halo extending over three million light years indicates the cluster's large mass.
Brown University professors and USC colleagues find a molecule spinning at 270 trillion rotations per minute, annihilating friction. The phenomenon challenges old laws of physics, suggesting molecules can move energy without slowing down.
Researchers spin a molecular stick, creating a shock wave that destroys friction in the surrounding liquid, allowing it to rotate freely. The discovery challenges traditional models of liquid behavior and has significant implications for understanding chemical reactions.
A team of researchers found that a component of joint fluid called lubricin forms a thin barrier to prevent contact between joint surfaces, reducing wear and tear. The combination of lubricin and hyaluronic acid produces an even greater protective effect than either substance alone.
University of Illinois researchers Gustavo Gioia and Pinaki Chakraborty explain the behavior, which was previously unknown. The findings provide a new way to calculate friction forces along rough walls.
A team of researchers at Georgia Institute of Technology discovered that the formation of capillary structures is thermally activated. By studying the frictional forces acting on an atomic force microscope tip, they found that reducing temperatures and moving surfaces quickly can reduce adhesion between nanoscale surfaces.
Researchers used advanced techniques to study human hair and found that conditioners don't evenly cover the entire hair shaft, leading to frizz. A new conditioner formula has been developed with additives to improve even coverage, and similar techniques could be applied to beauty products like lipstick and nail polish.
Researchers tested a long-held friction theory using a quasicrystalline material, finding that friction along the periodic surface was significantly higher than along the aperiodic axis. The study's findings have implications for understanding the relationship between a material's structure and its frictional properties.
Scientists use AFM and STM to study frictional force in decagonal quasicrystals, revealing strong connection between interface structure and dissipation. The results show that friction is greater along the periodic direction, with an anisotropy of up to 8 times greater than in the aperiodic direction.
Physicists propose new class of time machines that avoid difficulties inherent in other models. Researchers also analyze lateral vibrations to control friction and crack propagation in thin films. The horizontal Brazil nut effect is studied, showing grain migration to center or edge based on size and density.
Research by Johns Hopkins physicists reveals that atomic-scale surfaces exhibit drastically different friction and adhesion forces due to their unique structures. The findings have significant implications for the development of nanotechnology, which could lead to improved device performance and functionality.
Researchers create a new mathematical model that explains the relationship between friction and motion, suggesting that traditional braking methods may not be the most effective. The findings could lead to improved road safety by optimizing brake performance.
Researchers developed an experiment to measure the behavior of curling stones, revealing that wet friction is involved in their curl. The study found that a thin liquid layer reverses the dominant frictional force on the stone, resulting in a clockwise-turning stone curling to the right.
Researchers at The Hebrew University of Jerusalem have discovered that slow waves in the earth's crust may be precursors to frictional movement causing earthquakes. By measuring these 'unfelt' waves using micro-scale technology, scientists hope to prevent earthquake-related damage through early warnings.
Researchers at NIST created a new technique to measure friction accurately in the nano- and micro-scale. The method helps designers produce more durable devices with moving parts by accounting for unintended scratching of surfaces.
A NIST study identifies a potential source of error in the automotive industry's use of surface roughness data to predict friction. The researchers developed an improved analytical approach that can help automakers incorporate lighter weight materials and improve fuel efficiency.
Researchers have made significant discoveries in controlling friction at the nanometer scale, developing more resilient network architectures, and precisely manipulating millions of atoms. These advancements hold promise for improving nanoengineering applications and enhancing our understanding of fundamental mechanisms.
Researchers discovered that a mineral gel formed during rock abrasion can reduce friction between rocks to near-zero levels at high shearing speeds. This finding has implications for understanding and predicting earthquake damage, as it could lead to more accurate simulations of seismic slip speeds and fault weakening processes.
adidas introduces the JETCONCEPT bodysuit, which uses riblets to channel water and reduce drag, resulting in up to 3% increase in swimming performance. The suit was developed using technology from commercial aircraft, focusing on form drag rather than friction drag.
Graphite exhibits superlubrication when layers rotate relative to each other, reducing resistance and enabling smooth sliding. A new friction force sensor allows researchers to study this phenomenon, which could improve the lubricating qualities of graphite.
Researchers at Penn State have discovered that adding as little as 10% vegetable oil to diesel fuel reduces friction and wear, achieving similar performance to high-sulfur diesel. The team's tests also showed that oxygen-treated vegetable oil mixtures can meet current emission regulations with minimal oil usage.
Researchers at Texas A&M University have developed a nanotech control device that achieves six degrees of freedom for precise positioning in nanotechnology and telesurgery. The device eliminates mechanical contact and friction, improving accuracy and resolution, while decreasing manufacturing costs and increasing reliability.
Physicists at Johns Hopkins University have identified the molecular origins of static friction, resolving a long-standing issue in understanding Amontons' classic laws. The 'gunk in the middle' - hydrocarbon molecules between surfaces - provides an explanation for the linear relationship between force and load.
Researchers at Georgia Tech discovered a way to reduce friction in mechanical systems by rapidly oscillating the width of the lubricant-filled gap separating two sliding surfaces. This technique maintains disorder in the lubricant, preventing molecular layering that can increase friction.
Scientists have discovered that randomness in lubricants is a major contributor to friction at the molecular level. This finding could lead to reduced wear and tear on machinery. By understanding how lubricants fracture and heal, researchers may develop new methods to control friction and minimize wear.