The samples of cable used for bend over sheave fatigue testing were subjected to fracture analysis of the individual broken wires. Fractures were classified according to appearance under 50X microscope examination. High magnification was used to determine which fractures involved fatigue. After cataloguing fractures from samples of four different cable lots, it was found that the principal wire layer in which fatigue cracks originate can vary with the quality of the wire used for construction. A strong correlation was found between bend cycle life and fatigue crack initiation with tensile ductility of the wire as measured by reduction in area. There was also some evidence indicating that surface decarburization might also exert some significant effect. (Stoehr)
Correlation of makeup wire fracture modes and mechanical properties with fatigue life of large diameter cable
Korrelation von charakteristischen Drahtbruchmechanismen und mechanischen Eigenschaften mit Ermuedungserscheinungen bei Kabeln mit grossen Durchmessern
OCEANS '77 CONF. RECORD. THIRD ANNUAL COMBINED MTS-IEEE CONF. ; 1 , Okt ; 24B-6
1977
6 Seiten, 10 Bilder, 4 Tabellen, 6 Quellen
Aufsatz (Konferenz)
Englisch
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