The stress increase that is caused by the presence of an initial clearance within thesmall end of connecting rods for motorbike and car engines is investigated. Plane analyticaland numerical modellings of the dry contact between the small-end and piston pin areadopted. Based upon a recent analytical result, a normalizing parameter is introduced, whichallows the stress concentration factor at the small-end bore sides to be expressed as a functionof a proper combination of the initial clearance between the small end and gudgeon pin, theapplied load, and Young’s modulus, for prescribed aspect ratios of the small end and hollowpin. Design diagrams summarizing the consequences of an initial clearance between the smallendbore and gudgeon pin on the eye peak stress are reported, which cover a wide range ofgeometries, clearances, and loadings. Selected comparisons between two-dimensional andthree-dimensional models are carried out.

Influence of the initial clearance on the peak stress in connecting-rod small ends / A., Pioli; Strozzi, Antonio; Baldini, Andrea; Giacopini, Matteo; Rosi, Roberto. - In: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS. PART D, JOURNAL OF AUTOMOBILE ENGINEERING. - ISSN 0954-4070. - STAMPA. - 223:6(2009), pp. 769-782. [10.1243/09544070JAUTO1048]

Influence of the initial clearance on the peak stress in connecting-rod small ends

STROZZI, Antonio;BALDINI, Andrea;GIACOPINI, Matteo;ROSI, Roberto
2009

Abstract

The stress increase that is caused by the presence of an initial clearance within thesmall end of connecting rods for motorbike and car engines is investigated. Plane analyticaland numerical modellings of the dry contact between the small-end and piston pin areadopted. Based upon a recent analytical result, a normalizing parameter is introduced, whichallows the stress concentration factor at the small-end bore sides to be expressed as a functionof a proper combination of the initial clearance between the small end and gudgeon pin, theapplied load, and Young’s modulus, for prescribed aspect ratios of the small end and hollowpin. Design diagrams summarizing the consequences of an initial clearance between the smallendbore and gudgeon pin on the eye peak stress are reported, which cover a wide range ofgeometries, clearances, and loadings. Selected comparisons between two-dimensional andthree-dimensional models are carried out.
2009
223
6
769
782
Influence of the initial clearance on the peak stress in connecting-rod small ends / A., Pioli; Strozzi, Antonio; Baldini, Andrea; Giacopini, Matteo; Rosi, Roberto. - In: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS. PART D, JOURNAL OF AUTOMOBILE ENGINEERING. - ISSN 0954-4070. - STAMPA. - 223:6(2009), pp. 769-782. [10.1243/09544070JAUTO1048]
A., Pioli; Strozzi, Antonio; Baldini, Andrea; Giacopini, Matteo; Rosi, Roberto
File in questo prodotto:
File Dimensione Formato  
Pioli_et_al_2009.pdf

Accesso riservato

Tipologia: Versione dell'autore revisionata e accettata per la pubblicazione
Dimensione 330.75 kB
Formato Adobe PDF
330.75 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/618371
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 21
  • ???jsp.display-item.citation.isi??? 14
social impact