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Mike Ciavarella's blog

Is Tribology Approaching Its Golden Age? Grand Challenges in Engineering Education and Tribological Research

Submitted by Mike Ciavarella on
opinion
tribology
friction
adhesion
wear
fractals

An interesting paper by VL Popov which suggests many problems of tribology are still very far from being remotely solved.  Despite the very detailed theories for example on rough contact using fractal surfaces on which we have debated mainly academically , there is not a single theory for any quantitative prediction of friction coefficient which can vary by 1 order of magnitude and its dependence on many variables, let alone wear coefficient which can vary up to 7 orders of magnitude.  What is left to do, other than measure?   Is tribology bound to be in practice just an

On stickiness criteria for multiscale random rough contacts

Submitted by Mike Ciavarella on
research
adhesion
dmt
pastewka-robbins criterion
stickiness
persson-scaraggi

We have just submitted a paper which solves a problem that I have been struggling to solve for many years.

Any comments are welcome to improve, while the paper goes the standard review process in the journal we submitted it.

 

On stickiness of multiscale randomly rough surfaces

are fractal surfaces adhesive? a new attempt on JMPS

Submitted by Mike Ciavarella on
research
adhesion
Roughness

In 2007 I wrote a question in Imechanica, IS THERE NO PULL-OFF FOR ADHESIVE FRACTAL SURFACES?

Clearly, in 2007 this question was too hard to answer.  I pointed there that Fuller and Tabor 1975 asperity theory predicted a weird limit for a true fractal surface, that of no stickiness for any fractal dimension or amplitude, in the limit.

National TV program on Politecnico di BARI and its successes

Submitted by Mike Ciavarella on

See a national broadcast on Politecnico di BARI and the region Puglia, with its successes, including the worldwide success of Diesel common rail technology, the GE centre on Addittive Manufacturing and Cold Spray, and others.

 

Mechatronics, the world patent on diesel common rail technology, for which Bosch created a factory of 2000 employees (now, after dieselgate, trying to reconfigure this), biomedical, tribology, etc.

 

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