Action of a local load on a reinforced cylindrical shell

In a recent paper, two of the present authors showed that the maximum stresses measured in a cylindrical shell subjected to a radially applied local load were higher than BS 5500, Appendix G could predict. In order to investigate this apparent discrepancy, an analysis of a cylindrical shell under non-axisymmetric radial loading was carried out using Sanders linear shell equations, which are generally acknowledged as being the most exact available. It is shown, however, that the results from this analysis do not provide better agreement with experiment than those earlier analyses on which design codes are now currently based.

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State of stress produced by a local load acting on a circular cylindrical shell with stepwise longitudinal changes of thickness

Strength of Materials ◽

10.1007/bf00770297 ◽

1973 ◽

Vol 5 (2) ◽

pp. 222-228

Author(s):

R. V. Modestova ◽

A. M. Simakin ◽

E. N. Samoilenko ◽

G. N. Stepanova

Keyword(s):

Cylindrical Shell ◽

Circular Cylindrical Shell ◽

Local Load ◽

Longitudinal Changes ◽

State Of Stress

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Displacements in an Elastic-Plastic Cylindrical Shell

Journal of Applied Mechanics ◽

10.1115/1.4011210 ◽

1956 ◽

Vol 23 (1) ◽

pp. 73-79

Author(s):

P. G. Hodge

Keyword(s):

Cylindrical Shell ◽

Elastic Limit ◽

Radial Pressure ◽

Collapse Load ◽

Rigid Plastic ◽

Elastic Plastic ◽

Plastic Cylindrical Shell ◽

Theoretical Results ◽

Reinforced Cylindrical Shell ◽

Plastic Theory

Abstract A reinforced cylindrical shell which is loaded with a uniform excess external radial pressure can support a load considerably greater than the elastic limit. While several recent investigations have been concerned with finding the collapse load of the shell, no attention has been paid to the corresponding deformations. Although rigid-plastic theory is sufficient to determine the collapse load, the more complex elastic-plastic theory must be used in investigating the displacements. In the present paper the elastic-plastic problem is stated for an ideal sandwich shell, and the stresses and deformations are computed for a particular example. Since the computations are found to be quite laborious, an approximate technique, applicable to all shells, is developed. The paper closes with some comments on the relation between the theoretical results and the behavior to be expected in real shells.

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