This study aims at developing an experimental tool useful to define accurately the friction coefficients in bolted joints and, therefore, at relating precisely the tightening torque to the bolt preloading force in some special components used in front motorbike suspensions. The components under investigation are some clamped joints made of aluminium alloy. The preloading force is achieved by applying a torque wrench to the bolt head. Some specific specimens have been appropriately designed and realized in order to study the tribological aspects of the tightening phase. Experimental tests have been performed by applying the Design of Experiment (DOE) method in order to obtain a mathematical model for the friction coefficients. Three replicas of a full factorial DOE at two levels for each variable have been carried out. The levels include cast versus forged aluminium alloy, anodized versus spray-painted surface, lubricated versus unlubricated screw, and first tightening (fresh unspoiled surfaces) versus sixth tightening (spoiled surfaces). The study considers M8x1.25 8.8 galvanized screws

Experimental study of friction in aluminium bolted joints / Croccolo; De Agostinis; Vincenzi. - ELETTRONICO. - 6:(2010), pp. 1-8. (Intervento presentato al convegno ICEM14 International Conference on Experimental Mechanics tenutosi a Poitiers (France) nel 4-9/07/2010) [10.1051/epjconf/20100608003].

Experimental study of friction in aluminium bolted joints

CROCCOLO, DARIO;DE AGOSTINIS, MASSIMILIANO;VINCENZI, NICOLÒ
2010

Abstract

This study aims at developing an experimental tool useful to define accurately the friction coefficients in bolted joints and, therefore, at relating precisely the tightening torque to the bolt preloading force in some special components used in front motorbike suspensions. The components under investigation are some clamped joints made of aluminium alloy. The preloading force is achieved by applying a torque wrench to the bolt head. Some specific specimens have been appropriately designed and realized in order to study the tribological aspects of the tightening phase. Experimental tests have been performed by applying the Design of Experiment (DOE) method in order to obtain a mathematical model for the friction coefficients. Three replicas of a full factorial DOE at two levels for each variable have been carried out. The levels include cast versus forged aluminium alloy, anodized versus spray-painted surface, lubricated versus unlubricated screw, and first tightening (fresh unspoiled surfaces) versus sixth tightening (spoiled surfaces). The study considers M8x1.25 8.8 galvanized screws
2010
ICEM14 International Conference on Experimental Mechanics
1
8
Experimental study of friction in aluminium bolted joints / Croccolo; De Agostinis; Vincenzi. - ELETTRONICO. - 6:(2010), pp. 1-8. (Intervento presentato al convegno ICEM14 International Conference on Experimental Mechanics tenutosi a Poitiers (France) nel 4-9/07/2010) [10.1051/epjconf/20100608003].
Croccolo; De Agostinis; Vincenzi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/90648
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