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Abstract

In this paper the literature on the strength of compound cylinders subjected to internal pressure is reviewed. The theoretical treatment is briefly discussed and a theory for the pressure-expansion curve for a partially plastic duplex or two-component vessel is given. Pressure tests on two duplex vessels are reported, one made of Vibrac steel and having an overall diameter ratio of 2, and the other made of 0.15 per cent carbon steel and having an overall diameter ratio of 5.86.

It is concluded that considerable and unpredictable axial stresses are set up when the two-component cylinders are shrunk together. Apparently, however, these do not seriously influence the yield pressure computed on the assumption that no axial stresses are induced during shrinking. In the partially plastic region there is good agreement between the experimental values and the theoretical pressure-expansion curve. The ultimate pressure and experimental pressure-expansion curves at large strains are in good agreement with values predicted for monobloc cylinders of the same overall diameter ratio.

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Behaviour of Compound Steel Cylinders Subjected to Internal Pressure

Abstract

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References