Failure analysis of a crane gear shaft (CROSBI ID 689657)
Prilog sa skupa u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Vukelić, Goran ; Pastorčić, Darko ; Vizentin, Goran
engleski
Failure analysis of a crane gear shaft
This research deals with a teeth failure of a gear shaft that served as a part of shipyard crane drive train. Almost all of the teeth of a spiral bevel gear, part of a larger shaft, fractured during normal operation of the crane. Failure analysis combined experimental and numerical research. Visual inspection was employed to determine the fracture location and crack propagation paths. Microscopy, optical and scanning electron (SEM), was used to inspect damaged surfaces of the teeth, reveal possible flaws and fine microstructure of the material. Type of steel used for manufacturing was determined based on chemical composition of the material obtained using optical emission spectrometer with glow discharge source (GDS) sample stimulation. Further, tensile specimens were extracted from the shaft to test the strength of the steel. Additionally, hardness test was performed. All experimental research suggest it is a case of gear teeth spalling, probably caused by excessive contact stresses. To gain better understanding of the failure process, a 3D numerical model of the gear shaft was built and finite element (FE) stress analysis performed. Analysis showed excessive contact stresses at the teeth contact area. Time-varying meshing stiffness (TVMS), an important gear health condition parameter, is determined via FE procedure for several examples of healthy to gradually damaged gear. Obtained results show how spall propagation influences TVMS and, thus, affects gear performance leading to potential failure.
gear ; bevel gear ; crane gear shaft ; failure analysis
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Podaci o prilogu
406-412.
2019.
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objavljeno
10.1016/j.prostr.2019.08.182
Podaci o matičnoj publikaciji
Procedia structural integrity
Iacoviello, Francesco ; Susmel, Luca ; Firrao, Donato ; Ferro, Giuseppe
Catania: Elsevier
2452-3216
Podaci o skupu
25th International Conference on Fracture and Structural Integrity, IGF 25
predavanje
12.06.2019-14.06.2019
Catania, Italija
Povezanost rada
Brodogradnja, Strojarstvo, Temeljne tehničke znanosti