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Marina di Pisa, Italy

Santochi M.,Nuclear and Production Engineering
Procedia CIRP | Year: 2013

After a short history of CIRP, the paper describes the present structure and organization of this international academy, its vision and mission. The key points of CIRP policy are presented and discussed. The challenges and perspectives of the future of CIRP are finally presented in terms of continutity and improvement. Source


Mattei L.,Nuclear and Production Engineering | Di Puccio F.,Nuclear and Production Engineering | Ciulli E.,Nuclear and Production Engineering
Tribology International | Year: 2013

Wear of UHMWPE acetabular components is the most serious threat to the long-term success of hip replacements. Consequently numerical and experimental wear simulations are of great interest. The present study proposes a mathematical wear model and compares the most recent wear laws, based on the so-called cross-shear (CS) effect. Simulations highlighted the variability of wear predictions with the wear factors/laws. Moreover a sensitivity analysis underlined that the kinematic conditions affect volumetric/linear wear more than the loading ones. This study confirms the importance of the CS in wear predictions even if some critical issues are still open, requiring further investigations. © 2012 Elsevier Ltd. All rights reserved. Source


Mattei L.,Nuclear and Production Engineering | Di Puccio F.,Nuclear and Production Engineering | Piccigallo B.,Nuclear and Production Engineering | Ciulli E.,Nuclear and Production Engineering
Tribology International | Year: 2011

The tribological performance of artificial hip joints is a critical issue for their success, because adverse tissue reaction to wear debris causes loosening and failure. Many studies on wear and lubrication of hip prostheses have been published in the last 10 years, mostly on experimental tests. Theoretical/numerical models have been proposed for investigating geometrical and material parameters also. This paper reviews recent literature on lubrication and wear models, stressing simplifying hypotheses, input data, methods and results. It is pointed out that actually lubrication and wear are described neglecting each other while new advanced models including both aspects could be helpful. © 2010 Elsevier Ltd. All rights reserved. Source

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