The geometries commonly employed in gudgeon pins for internal combustion engines are examined. In particular, various methods for reducing the pin weight are considered. The selection of the appropriate clearance is addressed. The most typical failure modes are classified and interpreted in the light of stress analysis. The available approximate design formulae are assessed versus selected Finite Element forecasts. The fatigue cycles of stress and displacement related parameters are examined. The effect of the initial clearance on the contact pressure and on the pin ovalization is explored for selected clearance values. A typical Y-shaped fatigue crack is interpreted with the aid of Mohr circle. An error in a classical design approach based upon the containment of the pin ovalization is hypothesized.

A repertoire of failures in gudgeon pins for internal combustion engines, and a critical assessment of the design formulae / Strozzi, A.; Baldini, A.; Giacopini, M.; Bertocchi, E.; Mantovani, S.. - In: ENGINEERING FAILURE ANALYSIS. - ISSN 1350-6307. - 87:(2018), pp. 22-48. [10.1016/j.engfailanal.2018.02.004]

A repertoire of failures in gudgeon pins for internal combustion engines, and a critical assessment of the design formulae

Strozzi, A.;Baldini, A.;Giacopini, M.
;
Bertocchi, E.;Mantovani, S.
2018

Abstract

The geometries commonly employed in gudgeon pins for internal combustion engines are examined. In particular, various methods for reducing the pin weight are considered. The selection of the appropriate clearance is addressed. The most typical failure modes are classified and interpreted in the light of stress analysis. The available approximate design formulae are assessed versus selected Finite Element forecasts. The fatigue cycles of stress and displacement related parameters are examined. The effect of the initial clearance on the contact pressure and on the pin ovalization is explored for selected clearance values. A typical Y-shaped fatigue crack is interpreted with the aid of Mohr circle. An error in a classical design approach based upon the containment of the pin ovalization is hypothesized.
2018
6-feb-2018
87
22
48
A repertoire of failures in gudgeon pins for internal combustion engines, and a critical assessment of the design formulae / Strozzi, A.; Baldini, A.; Giacopini, M.; Bertocchi, E.; Mantovani, S.. - In: ENGINEERING FAILURE ANALYSIS. - ISSN 1350-6307. - 87:(2018), pp. 22-48. [10.1016/j.engfailanal.2018.02.004]
Strozzi, A.; Baldini, A.; Giacopini, M.; Bertocchi, E.; Mantovani, S.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1155889
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