Creep buckling of an elastic-plastic cylindrical shell.

AIAA Journal ◽  
1968 ◽  
Vol 6 (12) ◽  
pp. 2440-2442 ◽  
Author(s):  
LARS AKE SAMUELSON
Keyword(s):  
Cylindrical Shell ◽  
Elastic Plastic ◽  
Creep Buckling ◽  
Plastic Cylindrical Shell

Displacements in an Elastic-Plastic Cylindrical Shell

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.

A Parametric Study of Elastic-Plastic-Creep Buckling of a Thin Cylindrical Shell

1974 ◽  
Vol 96 (3) ◽  
pp. 155-161 ◽  
Author(s):  
I. Berman ◽  
J. M. Chern ◽  
G. D. Gupta
Keyword(s):  
Cylindrical Shell ◽  
External Pressure ◽  
Buckling Load ◽  
Sustained Load ◽  
Thin Cylindrical Shell ◽  
Elastic Plastic ◽  
Creep Buckling ◽  
Explicit Reference ◽  
Class 1 ◽  
Plastic Creep

The elastic-plastic-creep buckling of a long thin cylindrical shell with initial out-of-roundness subjected to uniform external pressure is herein studied. The work is carried out by means of an economical computer program which consistently accounts for the effects of load changes and plastic strains and which has a calculation procedure based on direct integration. The ratio of the sustained load to the initial buckling load is discovered to be a parameter which relates the sustained load to the buckling time without explicit reference to the geometric parameters for the conditions considered. Other results are uncovered concerning the effect of: the shape of the imperfection, the temperature variations and the choice of creep relations on initial buckling load and buckling time. Alternatives to the expensive and time consuming calculations to meet the requirements of the time factor of safety on Code Case 1331 of the ASME Boiler and Pressure Vessel Code for Class 1 nuclear components are explored. Recommendations are made.

Instability in an Elastic-Plastic Cylindrical Shell Under Axial Compression

1969 ◽  
Vol 36 (1) ◽  
pp. 47-50 ◽  
Author(s):  
S. T. Ariaratnam ◽  
R. N. Dubey
Keyword(s):  
Cylindrical Shell ◽  
Axial Compression ◽  
Wide Class ◽  
Yield Surface ◽  
Critical Stress ◽  
Elastic Plastic ◽  
Plastic Cylindrical Shell ◽  
Unit Normal

The condition for bifurcation of equilibrium for an elastic-plastic cylindrical shell under axial compression is established. The shape of the yield surface has been left arbitrary; hence the result is applicable to a wide class of inelastic solids. It is shown that the value of the critical stress is quite sensitive to the variation in the unit normal to the local yield surface.

Effects of Material Parameter Variability on Buckling and Creep Fatigue Interaction at Elevated Temperature

1976 ◽  
Vol 98 (1) ◽  
pp. 75-80 ◽  
Author(s):  
I. Berman ◽  
A. C. Gangadharan ◽  
G. H. Jaisingh ◽  
G. D. Gupta
Keyword(s):  
Cylindrical Shell ◽  
Fatigue Damage ◽  
Initial Imperfection ◽  
External Pressure ◽  
304 Stainless Steel ◽  
Thin Cylindrical Shell ◽  
Elastic Plastic ◽  
Creep Buckling ◽  
Creep Fatigue ◽  
Type 304

The effects of variation of elastic-plastic and creep properties of type 304 stainless steel on solutions of two specific inelastic problems are studied in this paper. The problems considered are: 1 – elastic-plastic-creep buckling of a thin cylindrical shell with initial imperfection and sustained external pressure at high temperature; and 2 – creep and fatigue damage in a thin cylindrical shell subjected to cyclic thermal load and constant internal pressure. Some conclusions are drawn as to the relative importance of variations of different material parameters on initial buckling load, creep buckling time and creep and fatigue damage factors.

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