Supporting capacity with external pressure of spherical shells of porcelain
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Conclusions
- 1.
Inexpensive closed solid spherical shells of porcelain possessing a supporting capacity of 45–60 MPa with a relative weight of 0.42–0.6 may be produced by slush casting.
- 2.
As in shells of high-strength ceramic and glass, initial deviations from the ideal form have a significant influence on the supporting capacity of spherical shells of porcelain under the action of an all-sided external pressure. In shells characterized by initial deflections on the order of half of the wall thickness stresses equal to 70% of the compressive strength of the material in uniaxial compression tests of rod specimens may be realized under the action of external pressure.
- 3.
Shells with a diameter of not less than 550 mm possessing a supporting capacity of ∼60 MPa with a relative weight of 0.7 may be produced by plastic forming of a porcelain mixture.
- 4.
The development of methods for the production of ceramic shells with the minimum initial nonuniformities in form is one of the basic directions in increasing their technical characteristics.
Keywords
Compressive Strength Wall Thickness Significant Influence Compression Test Relative WeightPreview
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