In the present work, the Von Mises stress concentration factors K have been calculated on the hub of a compression-fit coupling when the shaft extends beyond the hub. The theoretical stresses, assumed to be constant on the whole coupling surface, have been evaluated by applying the thick-wall theory, whereas the maximum stresses have been calculated by performing several non-linear FEA. The increase of the stress is located at the end of the hub where some expressions of the stress concentration factor have been defined as a function of different loading cases, geometrical parameters, and a tensile ratio. The interference level produces a stress concentration factor, which depends on the Q(A) and Q(I) ratios, but it is independent of the interference level. With the addition of an external pressure on the hub, the stress concentration factor notably increases, whereas the simultaneous presence of an internal pressure on the shaft, in addition to the interference or to the interference and to the external pressure on the hub, does not produce any relevant variation of the K values. The stress concentration factors used in addition to the thick-walled cylinders theory are extremely useful for evaluating the local maximum stress without performing any type of numerical analyses
Stress concentration factors in compression-fit couplings
Verteilung der mechanischen Spannung in Klemmverbindungen
2010
10 Seiten, 21 Bilder, 2 Tabellen, 13 Quellen
Article (Journal)
English
Mechanical couplings conventional compression couplings
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