Review article

Failure analysis of the rolling mill stand coupling

Željko Domazet ; Fakultet elektrotehnike, strojarstva i brodogradnje, Split
Francisko Lukša ; Fakultet elektrotehnike, strojarstva i brodogradnje, Split
Petra Bagavac ; Fakultet elektrotehnike, strojarstva i brodogradnje, Split

Abstract

The failure analysis of two slipper couplings showed that both couplings fractured as a result of fatigue. In both cases, the fracture started in the corner between the paddle and the coupling body and propagated around the corner. Both fractures were caused by the deficient design of the fillet between the paddle and the coupling body with high stress concentration. In order to extend actual service life, three design modifications were considered. Numerical analysis showed that the redesign of the coupling with stiffener between the paddle and the coupling body reduced maximum local and actual service life of couplings and can be improved from finite to infinite.

Keywords

failure analysis; slipper coupling, fatigue

Hrčak ID:

238467

URI

https://hrcak.srce.hr/238467

Publication date:

3.3.2020.

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