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Frictional energy dissipation in contact of nominally flat rough surfaces under harmonically varying loads

Frictional energy dissipation in contact of nominally flat rough surfaces under harmonically varying loads  Original Research Article


Journal of the Mechanics and Physics of Solids, , Available online 1 October 2011,
C. Putignano, M. Ciavarella, J.R. Barber   View Abstract  

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A simple approximate expression for finite life fatigue behaviour in the presence of ‘crack-like’ or ‘blunt’ notches

After a long process (somebody may recall I made also quite some chaos on imechanica to complain with the review process in a previous journal), this paper was accepted.  Ask me a preprint if you are interested.  I can attach here a few images only.


M. CIAVARELLA
Politecnico di Bari, 70125 Bari, Italy
Received in final form 13 June 2011

 

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Benoit Mandelbrot dies at 85

Mandelbrot has passed away last week.  A very interesting  mathematician, who received tenure from Yale only at 75, he has introduced fractals also in fracture mechanics.

Benoit Mandelbrot, Father of Fractals, Dies at 85

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Neet generation, generation not-not, generacion ni-ni, many terms one meaning!

 

I think I have spoken various times of this problem.

In Italy there was today an announcement that we have the biggest such problem in Europe.  See here .

When I search in wikipedia, I find various terms.

NEET in Uk, Japan, China, South Korea

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Some example videos of my new YouTube channel course "Mechanics of Materials" (italian)

Given the success of my facebook course Mechanics of Materials MMCM see here, we had so many videos and photos, that I suggested the students to create a Youtube channel.   Here it is, with many videos based on powerpoint presentations I had from my course, and that of collegues in Torino (Masssimo Rossetto), or some conferences presentations, which the students transformed into videos.  Thanks in particular to Mariella Greco, and Simone Legari.

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The Micromechanics of Interfaces A Symposium in Honor of Professor Leon Keer

The Micromechanics of Interfaces
A Symposium in Honor of Professor Leon Keer
Symi, Greece
July 18-23, 2010

Chair:
Xanthippi Markenscoff
University of California
San Diego

Program

Monday, July 19, 2010

9:00 - 10:00
Leon Keer
A unified theory for modeling damage to real surfaces in contact

10:00 - 10:10
Break

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The shape of the Eiffel Tower

I've got interested, since I am going with about 10 of my students to Paris for the Euromech conference I am coorganizing in July, by the design of the Eiffel Tower.  Eiffel was a great engineer, and indeed his shape of the tower apparently comes from his ingenious idea of  balancing weigth and wind pressure so that there is little need of foundations.  WIKIPEDIA has an account of this design idea, and the resulting integro-differential equation.

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Is Your Thesis Hot? Or Not? --- check it out !

Is Your Thesis Hot? Or Not?

Writing a thesis about animal intentionality and tool use is
totally hot right now. A thesis about Robert Louis Stevenson's use of
the supernatural to symbolize evil? Not so much.

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Suresh's group Fighting Malaria: Understanding the Biomechanical Properties of Red Blood Cells

Suresh's group Fighting Malaria: Understanding the Biomechanical Properties of Red Blood Cells

Subra Suresh with Quinn

MIT Dean of Engineering Subra
Suresh with graduate
student David Quinn. Photo: L. Barry Hetherington

 

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statistics about students in world universities

dear Friend

I am comparing italian universities with Russian ones with US and with Cuban ones. Then I need some figures.

I have been able for example to find that there are about 50% of students-workers in Russia, what about US?
I mean full time workers, not just part time.

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Ferrari Millechili project --- the next generation of sport car

I am going to Modena on Monday to talk to my collegues in the Millechili lab (MilleChili means 1000Kg in italian)

Ferrari-Logo.svg

Ferrari S.p.A.

 

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Promotion at random is better! Tenure makes you more "incompetent" -- Peter's principle proved by two italian scientists!

If you are upset about promotion system, look at what two italian friends proved recently, which was immediately popular before the paper publication, also because they proved random promotion is more efficient!

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Euromech workshop on Multiscale effects in Fatigue, July 7-9, 2010 at the Ecole Polytechnique

Dear Collegue

We are organising in July 7-9, 2010 an Euromech workshop on Multiscale
effects in Fatigue, at the Ecole Polytechnique, near Paris in France.
Outcomes and topics are detailed on the following web site:

http://www.lms.polytechnique.fr/Euromech

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Strain gradient plasticity: the flow rule of Fleck and Hutchinson violates thermodynamics ?

A recent paper on JMPS has seriously questioned the foundation of the SGP theory of Fleck and Hutchinson.  The matter is not simple, but is it a good bench test for imechanica to discuss?

doi:10.1016/j.jmps.2008.12.002    

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a couple of recently published papers in contact mechanics -- roughness and dynamic rolling

For those interested in a classical subject like contact mechanics, here are a couple of recent papers published in August.  One is an extension of the Greenwood Williamson theory of rough contact, and the other is a linear perturbation solution of the classical Carter rolling contact problem for a rolling cylinder, when the surface is corrugated and hence there are oscillations in both normal and tangential loads.

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biomimetics from national geographics april 2008

http://ngm.nationalgeographic.com/2008/04/biomimetics/tom-mueller-text

Biomimetics

Boxfish Hdr

Biomimetics: Design by Nature
What has fins like a whale, skin like a lizard, and eyes like a moth? The future of engineering.

By Tom Mueller

Photograph by Robert Clark

Biomimetics: Design by Nature

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China: The prizes and pitfalls of progress

Remember when I spoke of the Easterlin paradox (a key concept in happiness economics postulated by Richard Easterlin in the 1974 paper "Does Economic Growth Improve the Human Lot? Some Empirical Evidence."[1]
It finds that, contrary to expectation, happiness at a national level

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Mars and Venus - How Europeans and Americans View and Use Science - ESOF July20th -Part 1: The Eu Perspective -

From ESOF, an interesting presentation, attached. 

Mars and Venus
How Europeans and Americans
View and Use Science<
Part 1: The European Perspective

Dr Roland Schenkel, Director General, European Commission, Joint Research Centre (JRC)

 Some quotes

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The full list of journals ranked by H index --- but not the list of highlycited papers :(

After some conversation with Roozbeh which are "irritatingly useful" :) I found that this site has done already all the calculations we need http://www.scimagojr.com/  except the list of highlycited papers which remains for me the most interesting aspect and which we seem to need to do manually as we did yesterday with IJSS and JMPS at Most cited papers and H-factor of some mechanics journals -- IJSS

Some results are attached as a big PDF file.

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A 25million US$ challenge for imechanica: VIRGIN EARTH CHALLENGE

 

Sir Richard Branson has recently announced

VIRGIN EARTH CHALLENGE 

The Virgin Earth Challenge is a prize of $25m for whoever can demonstrate to the judges' satisfaction a commercially viable design which results in the removal of anthropogenic, atmospheric greenhouse gases so as to contribute materially to the stability of Earth’s climate.

 

I know it is NOT our main expertise, but should imechanica altogether run for the challenge?

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