Subscribe free to our newsletters via your
. Space Industry and Business News .




TECH SPACE
VTT researcher finds explanation for friction
by Staff Writers
Helsinki, Finland (SPX) May 31, 2012


Friction originates in nanoscale contacts, as the result of new surface formation.

Friction is a key phenomenon in applied physics, whose origin has been studied for centuries. Until now, it has been understood that mechanical wear-resistance and fluid lubrication affect friction, but the fundamental origin of sliding friction has been unknown.

Dr. Lasse Makkonen, Principal Scientist at VTT Technical Research Centre of Finland, has now presented an explanation for the origin of sliding friction between solid objects. According to his theory, the amount of friction depends on the surface energy of the materials in question.

Friction has a substantial effect on many everyday phenomena, such as energy consumption. Makkonen's model is the first to enable quantitative calculation of the friction coefficient of materials.

According to Makkonen's theory, the amount of friction is related to the material's surface energy. Friction originates in nanoscale contacts, as the result of new surface formation.

The theory explains the generation of frictional force and frictional heating in dry contact. It can be applied in calculating the friction coefficient of various material combinations.

The model also enables the manipulation of friction by selecting certain surface materials or materials used in lubrication layers, on the basis of the surface energy between them.

Makkonen's theory on sliding friction was published in the journal AIP Advances of the American Institute of Physics. The research was funded by the Academy of Finland and the Jenny and Antti Wihuri Foundation.

A thermodynamic model of sliding friction

.


Related Links
VTT Technical Research Centre of Finland
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TECH SPACE
Thousands of invisibility cloaks trap a rainbow
Washington DC (SPX) May 28, 2012
Many people anticipating the creation of an invisibility cloak might be surprised to learn that a group of American researchers has created 25 000 individual cloaks. But before you rush to buy one from your local shop, the cloaks are just 30 micrometres in diameter and are laid out together on a 25 millimetre gold sheet. This array of invisibility cloaks is the first of its kind and has be ... read more


TECH SPACE
Short movies stored in an atomic vapor

Oracle aims to dethrone IBM in business hardware

Mathematicians can conjure matter waves inside an invisible hat

VTT researcher finds explanation for friction

TECH SPACE
New Mobile Antenna from ASC Signal Designed For Rapid Deployment by Defense and Commercial Users

Researchers Improve Fast-Moving Mobile Networks

Second AEHF Military Communications Satellite Launched

Fourth Boeing-built WGS Satellite Accepted by USAF

TECH SPACE
SpaceX Dragon capsule splash lands in Pacific

US cargo ship on return voyage from space station

US cargo vessel prepares to leave space station

Once Upon a Time

TECH SPACE
Lockheed Martin Completes Navigation Payload Milestone For GPS III Prototype

TomTom eyes expanding S. American market

Spirent Launches New Entry-Level Multi-GNSS Simulator

Beidou navigation system installed on more Chinese fishing boats

TECH SPACE
Louis Gallois hands EADS reins to Tom Enders

Boeing Delivers First EA-18G Growler Featuring Bharat Electronics Limited Cockpit Subassembly

Flapping protective wings increase lift

Russia, India to produce transports

TECH SPACE
The first chemical circuit developed

Copper-nickel nanowires could be perfect fit for printable electronics

Japan's Renesas ups chip outsourcing to Taiwan giant

New silicon memory chip developed

TECH SPACE
CryoSat goes to sea

S Korea to develop geostationary satellite for environmental monitoring

LiDAR Technology Reveals Faults Near Lake Tahoe

Satellite maps ocean floor

TECH SPACE
EU threatens Italy with court action over Rome trash

Fears as Latin America's largest trash dump closes

Ship's captain jailed over New Zealand oil spill

Germany, India in talks over treating Bhopal waste




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement