michele ciavarella
Born in Bari in 1970, he graduates from Politecnico di BARI in Mech Eng in 1994 cum Laude, and receives the PhD (“dottorato”) in Mech Eng (“ingegneria dei sistemi avanzati di produzione) at Politecnico di BARI, spending from March ‘96 to Aug.’97 at University of Oxford under Prof. DA Hills.From Oct. 1998 to Feb.1999 Senior Research Fellow (full time), University of Southampton, UKFrom Feb 1999 - Ott 2002, Senior Researcher, Consiglio Nazionale delle Ricerche (Italian National Research Council), Bari , ItPresently (from Nov. 2002), Professor at Politecnico di BARI (It), SSD Ing-Ind14 --- Machine Design.31st in the list of the Top Italian Scientists in Engineering http://www.topitalianscientists.org/TIS_HTML/Top_Italian_Scientists_Engineering.htmFrom Oct.10 to Oct. 12, Humboldt Senior Research Fellow, Technical Univ. Hamburg Harburg (G), working on squeak on hip prosthesis
Phone: +390805962881
Address: V.le Gentile 182, 70125 BARI, Italy.
skype: micheleciavarella
Phone: +390805962881
Address: V.le Gentile 182, 70125 BARI, Italy.
skype: micheleciavarella
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Papers by michele ciavarella
by Menga, Carbone & Dini (MCD), applying fracture mechanics energy concepts for the case of a sliding adhesive contact, imposing also the shear stress is constant at the interface and equal to a material constant (as it seems in experiments), leads to a increase of contact area which instead is never observed.
We add that the rigorous MCD theory also predict a size effect and hence a distortion of the JKR curve during sliding which is also not observed in experiments. Finally, a simpler example with the pure mode I contact case, leads in the MCD theory to an unbounded contact area, which is difficult to interpret, rather than a perhaps more correct limit of the Maugis-Dugdale solution for the adhesive sphere when Tabor parameter is zero, that is DMT’s solution. We discuss therefore the implications of the MCD theory, although they may be rather academic: recent semi-empirical models, with an appropriate choice of
the empirical parameters, seem more promising and robust in modelling actual experiments.