Anzeige
Erschienen in:
01.06.2013 | Technical Article---Peer-Reviewed
Fatigue Fracture of a Truck Diesel Engine Rocker-Bracket
Erschienen in: Journal of Failure Analysis and Prevention | Ausgabe 3/2013
EinloggenAktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
A diesel engine rocker-bracket fractured after trial running for 460 h. Fracture originated from the fillet root of cylinder of rocker-bracket. Fractographic analysis indicates that fatigue is the dominant failure mechanism of the rocker-bracket. Serious wear damage took place in the located region of the contact surfaces between the cylinder of the rocker-bracket and the rocker-arm. Occurrence of a great abnormal alternative bending load on the cylinder of rocker-bracket from the assembled rocker-arm is mainly responsible for the fracture failure of the rocker-bracket. The over-small root fillet radius of cylinder of rocker-bracket (below the specified limit) increases the stress concentration at the fillet to facilitate initiation and propagation of crack, and eventually premature fracture.