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A method of service-failure analysis is developed for the rotating shaft in a high pressure centrifugal municipal water supply pump. The fractured shaft exhibited a conical fracture surface. Although cracking of circular shafts under torsion represents an important industrial problem, current literature appears to confine failure analysis to simple crack geometries that are rarely found in practice. An equation for fracture toughness determination of the observed crack configuration is derived. The estimated fatigue life of the shaft compared favorably with the service record, thus confirming the validity of the derived fracture toughness equation. The fatigue life was predicted based on the analytically determined fracture toughness of the cracked shaft and the measured static and fatigue properties of the shaft material.
A method of service-failure analysis is developed for the rotating shaft in a high pressure centrifugal municipal water supply pump. The fractured shaft exhibited a conical fracture surface. Although cracking of circular shafts under torsion represents an important industrial problem, current literature appears to confine failure analysis to simple crack geometries that are rarely found in practice. An equation for fracture toughness determination of the observed crack configuration is derived. The estimated fatigue life of the shaft compared favorably with the service record, thus confirming the validity of the derived fracture toughness equation. The fatigue life was predicted based on the analytically determined fracture toughness of the cracked shaft and the measured static and fatigue properties of the shaft material.
Failure analysis for a water-pump shaft
Schadensanalyse bei einer Wasserpumpenwelle
Chow, C.L. (author)
1981
6 Seiten, 6 Bilder, 1 Tabelle, 17 Quellen
Conference paper
English
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