Stressed state of axially loaded turbine journal lips
- Cite this article as:
- Sarchenko, V.I., Nakonechnyi, V.V., Kodner, M.Y. et al. Strength Mater (1988) 20: 1540. doi:10.1007/BF01530163
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In loading a gently sloping conical shell of average thickness (h/R=0.0.08; 0.11) with an axial force, its stress-strain state is characterized mainly by bending in the meridional and circumferential directions. This state can be taken as two-dimensional.
Thin cylindrical ribs on the shell surfaces cause meridional stress concentration and practically do not affect the circumferential stress distribution.
The strses concentration around a hole in a gently sloping conical shell of average linearly variable thickness should be compared qualitatively with the stress concentration around a hole in a bending plate.
The stress concentration factor for the stresses around a hole, the axes of which is parallel to the shell axis (in case of conical shells loaded with an axial force), is less than that for stresses around a hole perpendicular to the shell surface.
The presence of ribs and a large number of holes significantly changes the stressed state of a shell. Therefore, based on data on shells, the stressed state of such a complex model, like that of a turbine journal-lip, can be estimated only approximately.