Equally strong holes in a cylindrical shell with initial imperfection

1988 ◽  
Vol 29 (2) ◽  
pp. 294-297
Author(s):  
N. V. Pustovoi ◽  
I. D. Suzdal'nitskii
Keyword(s):  
Cylindrical Shell ◽  
Initial Imperfection

Buckling of a Long, Axially Compressed, Thin Cylindrical Shell With Random Initial Imperfections

1972 ◽  
Vol 39 (4) ◽  
pp. 1066-1071 ◽  
Author(s):  
R. A. Van Slooten ◽  
T. T. Soong
Keyword(s):  
Cylindrical Shell ◽  
Spectral Density ◽  
Carrying Capacity ◽  
Initial Imperfection ◽  
Maximum Load ◽  
Load Carrying Capacity ◽  
Thin Cylindrical Shell ◽  
Initial Imperfections ◽  
Power Spectral ◽  
Load Carrying

The effect of random geometric imperfections on the maximum load-carrying capacity of an axially compressed thin cylindrical shell is studied. Following a perturbation approach, equations are derived which relate the first and second-order statistics of the maximum load to the statistics of the initial imperfections. Assuming that the imperfections are represented by Gaussian stationary and ergodic random processes, it is shown that the mean maximum load is expressible in quadrature forms involving the power spectral density of the initial imperfection. Furthermore, the maximum load is seen to be equal to its mean value with probability one. A simple asymptotic formula for the maximum load is derived assuming the variance of the initial imperfection is small. In this case the critical load depends only upon the imperfection variance and the power spectral density at a given wave number. For the types of imperfections considered, it is found that random axisymmetric imperfections reduce the load-carrying capacity of the cylindrical shell more than nonaxisymmetric imperfections.

Creep Buckling Under Varying Loads

1991 ◽  
Vol 113 (1) ◽  
pp. 41-45 ◽  
Author(s):  
N. Miyazaki ◽  
S. Hagihara ◽  
T. Munakata
Keyword(s):  
Cylindrical Shell ◽  
Spherical Shell ◽  
Circular Cylindrical Shell ◽  
Critical Time ◽  
Initial Imperfection ◽  
External Pressure ◽  
Deformation Analysis ◽  
The Finite Element Method ◽  
Creep Buckling ◽  
Damage Rule

Creep buckling analyses under stepwise varying loads are performed on a circular cylindrical shell with initial imperfection subjected to axial compression and a partial spherical shell under uniform external pressure. The finite element method is applied to a creep deformation analysis to obtain the critical time when creep buckling occurs. The results show that a linear cumulative damage rule for creep buckling can be well applied to the creep buckling of the circular cylindrical shell, but cannot to that of the partial spherical shell.

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.

Elasto-plastic state of curve beam system subjected to complex loading

1996 ◽  
Vol 18 (4) ◽  
pp. 14-22
Author(s):  
Vu Khac Bay
Keyword(s):  
Cylindrical Shell ◽  
Solution Method ◽  
Complex Loading ◽  
Numerical Results ◽  
Elastic Solution ◽  
Plastic State ◽  
Curve Beam ◽  
Elastic State ◽  
Elastic Plastic ◽  
Beam System

Investigation of the elastic state of curve beam system had been considered in [3]. In this paper the elastic-plastic state of curve beam system in the form of cylindrical shell is analyzed by the elastic solution method. Numerical results of the problem and conclusion are given.

Dynamic stability of a free-free cylindrical shell under a follower force

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 1070-1077
Author(s):  
Si-Hyoung Park ◽  
Ji-Hwan Kim
Keyword(s):  
Cylindrical Shell ◽  
Dynamic Stability ◽  
Follower Force
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