Fundamentals of Friction, Interview - Greenwood, Dowson, and Rabinowicz on tribology & engineering скачать в хорошем качестве

Fundamentals of Friction, Interview - Greenwood, Dowson, and Rabinowicz on tribology & engineering

NATO 1991 NATO ASI Fundamentals of Friction July/August 1991 at Braunlage, Germany Irwin Singer [My apology for the poor sound.] 1. What do engineers and engineering companies want from scientist? Duncan Dowson 2:16 Ernie Rabinowicz 4:10 Greenwood "Joe keeps the key to the oil" 5:17 Ernie Rabinowicz 6:07 Ernie Rabinowicz "Tribologists don't deserve this kind of money." 6:51 2. In what way have lubrication tribologists been successful? Duncan Dowson Continuum mechanics equations have been successful since 1876. 7:00 3. Tribologists can't predict friction coefficient or wear rate Duncan Dowson 8:20 Ernie Rabinowicz We can't get a better COF than 0.27 8:43 4. Failures of bearings require good detective work Duncan Dowson Why do bearings fail? 9:34 Irwin Singer Continuum Mechanics equations give numerical results, understood by engineers. But Tribology doesn't 'give' numbers. 10:37 Ernie Rabinowicz The friction coefficient is dimensionalist, so it's hard to find it. 11:42 Jim Greenwood Who is concerned about a COF? 12:20 Duncan Dowson Lubricants take care of friction. Wear is a problem for dry sliding 12:48 5. What has been the most valuable knowledge gained from this conferenc? Ernie Rabinowicz Bridging of the tribologists with computer modelers. 13:18 Duncan Dowson Lubrication at the molecular and nanoscale scale 14:45 Jim Greenwood Would Walt Disney's simulations be better? 16:45 6. Engineering and surface roughness development of AFMs Irwin Singer The AFMs have developed rapidly 17:32 Ernie Rabinowicz In jumps and starts 18:05 Irwin Singer Do engineers care about surface roughness? 19:07 Jim Greenwood Engineers are more interested in quality control than the details of surface roughness 19:55 7. Have engineers been taught to think about tribology? Ernie Rabinowicz and Duncan Dowson Most engineers only want a single number for surface roughness 20:03 Jim Greenwood Do design engineers care much about tribology 21:14 Duncan Dowson Bearing design is taught 21:42 Ernie Rabinowicz How much tribology is taught at universities? 22:23 Jim Greenwood and Duncan Dowson There is interest, but it's considered a materials problem 24:27 Ernie Rabinowicz Tribology isn't written into the curriculum 26:50 8. Can tribologist solve real-world problems? 27:45 Duncan Dowson Tribologists offer a range of solutions 28:30 Jim Greenwood and Ernie Rabinowicz Traditionally. they build a machine, then later figure out how it works and how to fix it. 29:10 Duncan Dowson Its trial and error 31:10 Duncan Dowson and Ernie Rabinowicz Corrosion engineering has the same issues. 32:10 Irwin Singer Is a physics background appropriate for teaching engineering tribology? 34:10 Ernie Rabinowicz - Physics provides ranges, engineers always want a number 34:38 Irwin Singer It appears that Richard Feynman did tribology studies for Prof Wulff at MIT 35:52 Ernie Rabinowicz John Wulff was a good friend. He got arrested by the FBI because he unknowingly was on board a ship captained by a Nazi spy. The president of MIT had to bail him out. 37:46 Duncan Dowson First professor of Mechanical Engineering was John Goodman (fatigue diagrams) 39:40 Jim Greenwood Is gear design Tribology or engineering? 42:00 9. What problems are tribologists best capable of solving? 43:45 Ernie Rabinowicz Companies have overlooked micromachines and copiers 46:45 Duncan Dowson Tribology has made great improvements 47:55 Ernie Rabinowicz Life of engines extended, tires 49:45 Irwin Singer Ernie's story of why tribologists are not liked by many in the tire and tool industry. 51:05 Duncan Dowson The 1973 oil crisis drove improved engines and oil. 52:58 Ernie Rabinowicz ZDTP molecule revolutionized the wear life of engines 54:40 10. Where will the nanoscale tribologist play a role in the future? 56:15 Ernie Rabinowicz Requires funding tribologists 56:50 Jim Greenwood Tabor wasn'tpermanent at Cavendish, until mid-50s 58:10 Ernie Rabinowics - on Bowden and Tabor 1:00:02 Duncan Dowson Concepts talked about here will make an impact only when engineers have confidence to put them into the design. 1:00:40 Ernie Today we hire research tribologists 1:02:03 Ernie Rabinowicz Cybernetics, Norbert Weiner's letter about Einstein, chess in the faculty club 1:05:38 Ernie Rabinowicz "when I was at Cambridge in the 1940s" 1:09:44 Duncan Dowson remembers Rayleigh's paper starting off "I was having a cup of tea with Kelvin" 1:10:50 Irwin Singer Donald Glasser discovering the bubble chamber while watching bubbles rise up a glass of beer 1:12:14 11: Duncan Dowson What is the take-away from this meeting for the engineering community? 1:13:45 Irwin Singer Most promising are nanoscale, visualizations & AFM. Mostly, getting people together to talk 1:14:09 12. Role of conferences and textbooks in tribology education 1:17:25 Ernie Rabinowicz One thing that worries me about English Universities and lower classes 1:28:20 tape: ASI E3 Video by Jonathan Singer; Videography by Irwin Singer