Accession Number:

AD0251088

Title:

PLASTIC AXISYMMETRIC BUCKLING OF RING-STIFFENED CYLINDRICAL SHELLS FABRICATED FROM STRAIN-HARDENING MATERIALS AND SUBJECTED TO EXTERNAL HYDROSTATIC PRESSURE

Descriptive Note:

Corporate Author:

DAVID TAYLOR MODEL BASIN WASHINGTON DC

Personal Author(s):

Report Date:

1961-01-01

Pagination or Media Count:

33.0

Abstract:

A cylindrical shell stiffened by uniformly spaced transverse rings and subjected to external hydrostatic pressure is analyzed for plastic buckling in the axisymmetric mode. In this analysis strain-hardening of the material is accounted for and Poissons ratio is treated asA VARIABLE WHICH VARIES FROM ITS VALUE IN THE ELASTIC STATE TO AN UPPER LIMIT OF 12 FOR INCOMPRESSIBLE MATERIAL. The differential equation for the plastic range is derived for axisymmetric buckling. Expressions for the plastic axisymmetric buckling pressures are obtained. A criterion of length of shell for long and short cylinders is presented, below which the shell can buckle in only one half wave. As a special case of the problem considered, a solution for the plastic buckling of a long cylinder under end compression is obtained. This solution degenerates to that previously obtained by Gerard for a Poissons ratio of 12 but represents a more rigorous solution in terms of variable Poissons ratios. Limited experimental evidence is presented in support of the theory. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE