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#### Author

- Nakonechnyi, V. V. [x] 3 (%)
- Berman, V. A. 1 (%)
- Kodner, M. Ya. 1 (%)
- Sarchenko, V. I. 1 (%)
- Savchenko, V. I. 1 (%)

#### Subject

- Characterization and Evaluation Materials 3 (%)
- Chemistry [x] 3 (%)
- Mechanics 3 (%)
- Structural Mechanics 3 (%)

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## Stressed state of axially loaded turbine journal lips

### Strength of Materials (1988-11-01) 20: 1540-1544 , November 01, 1988

### Conclusions

1.

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.

2.Thin cylindrical ribs on the shell surfaces cause meridional stress concentration and practically do not affect the circumferential stress distribution.

3.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.

4.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.

5.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.

## Stress concentration around openings in conical shells

### Strength of Materials (1988-02-01) 20: 254-258 , February 01, 1988

### Conclusions

1.

The bending stresses of a conical shell increase with increasing slope angle α of its generatrix to its axis, and stress redistribution occurs on the perimeter of the opening; the stresses σ_{ϕ} for the perimeter of the opening, which lies on the surface of the shell, have one sign, which agrees with the sign of the bending stresses on this surface.

The stress-concentration factor decreases with increasing angle α.

3.The stressed state of conical shells for which h/R≤1/10 can be assumed two-dimensional. The stress-concentration factor increases with increasing thickness of the conical shell.

## Bending of a circular plate with eccentric hole

### Strength of Materials (1987-07-01) 19: 994-998 , July 01, 1987

### Conclusions

1.

When a flexible circular plate, freely supported along the perimeter and loaded by an axial force applied at the center, is subjected to bending, then the surfaces on which σ_{R} and σ_{θ} are equal to zero lie inside the plate and do not coincide with each other or with the middle surface of the plate.

In the case of bending of a thin plate or a plate of medium thickness, the peripheral stresses σ_{ϕ} along the generatrices of the hole on the surface of the plate have the same sign, and this coincides with the sign of the bending stresses on that surface.

In a thin plate (K=2.7) the maximal stresses arise at the points 1 (5) of the perimeter of the hole lying on the tensioned surface of the plate, in a plate of medium thickness (K=2.4) at the points 3 and 7 of the perimeter of the hole lying on the compressed surface of the plate.