A Study of Creep Collapse of a Long Circular Cylindrical Shell Under Uniform External Pressure

1959 ◽  
Vol 26 (10) ◽  
pp. 663-669 ◽  
Author(s):  
N. J. HOFF ◽  
W. E. JAHSMAN ◽  
W. NACHBAR
Keyword(s):  
Cylindrical Shell ◽  
Circular Cylindrical Shell ◽  
External Pressure ◽  
Uniform External Pressure

Limit Analysis for Combined Edge and Pressure Loading on a Cylindrical Shell

1971 ◽  
Vol 93 (4) ◽  
pp. 998-1006
Author(s):  
H. S. Ho ◽  
D. P. Updike
Keyword(s):  
Cylindrical Shell ◽  
Velocity Field ◽  
Axial Force ◽  
Shear Force ◽  
Circular Cylindrical Shell ◽  
Yield Condition ◽  
External Pressure ◽  
Tresca Yield Condition ◽  
Stress States ◽  
Range Of Values

Equations describing the stress field and velocity field occurring in a circular cylindrical shell at plastic collapse are derived corresponding to stress states lying on each face of a yield surface for a uniform shell of material obeying the Tresca yield condition. They are then applied to the case of a shell under combined axisymmetric loadings (moment, shear force, and axial force) at one end and uniform internal or external pressure on the lateral surface. For a sufficiently long shell, complete solutions are obtained for a fixed far end, and for a certain range of values of axial force and pressure, they are obtained for a free far end. All the solutions are represented by either closed form or by quadratures. It is shown that in many cases the radial velocity field is proportional to the shear force.

Comment on Ross: “Design of Dome Ends to Withstand Uniform External Pressure”

1989 ◽  
Vol 33 (04) ◽  
pp. 326-326
Author(s):  
C. G. Nandakumar ◽  
K. Rajagopalan
Keyword(s):  
Cylindrical Shell ◽  
External Pressure ◽  
Spherical Cap ◽  
Uniform External Pressure ◽  
Submarine Hull

The instability pressure for a spherical cap that is used as the end closure for the submarine hull is found to be less than that of a cylindrical shell hull. Hence the new proposal for substituting an inverted dome in lieu of the spherical cap for the end closure is eminently worthwhile.

Nonlinear Finite Element Analysis of a Toroidal Shell With Ring-Stiffened Ribs

2010 ◽  
Author(s):  
Qing-Hai Du ◽  
Wei-Cheng Cui ◽  
Zheng-Quan Wan
Keyword(s):  
Finite Element ◽  
Cylindrical Shell ◽  
Circular Cylindrical Shell ◽  
Structural Characteristics ◽  
External Pressure ◽  
Nonlinear Finite Element ◽  
Toroidal Shell ◽  
Shells Of Revolution ◽  
Element Analysis ◽  
Stiffened Cylindrical Shell

The toroidal shell is a special type of shells of revolution, which is hardly solved by analytical method. To show the nonlinear structural characteristics of a circular toroidal shell with ring-stiffened ribs due to external pressure, both material nonlinear and geometric nonlinear Finite Element Analyses (FEA) have been presented in this paper, especially for the stability to the type of pressure hull. In the presented Finite Element Method (FEM), the elastic-plastic stress-strain relations have been adopted, and the initial deflection of toroidal shell created by manufacture was also taken into account. The analytic results eventually indicate that by nonlinear FEA such a new type of ring-stiffened circular toroidal shell could be used to a main pressure hull as the traditional ring-stiffened circular cylindrical shell, which could obtain kinds of performance in underwater engineering, such as better stability and more reserve buoyancy to the classical ring-stiffened cylindrical shell.

Interaction Curves for Circular Cylindrical Shells According to the Mises or Tresca Yield Criterion

1962 ◽  
Vol 29 (2) ◽  
pp. 375-380 ◽  
Author(s):  
P. G. Hodge ◽  
Joseph Panarelli
Keyword(s):  
Cylindrical Shell ◽  
Circular Cylindrical Shell ◽  
Plastic Material ◽  
Yield Criterion ◽  
External Pressure ◽  
Shell Material ◽  
Perfectly Plastic ◽  
Axial Tensile ◽  
Circular Cylindrical Shells ◽  
Interaction Curves

A circular cylindrical shell is subjected to uniform internal or external pressure and a constant axial tensile or compressive stress. The interaction curve constituting load combinations which just cause plastic flow of a rigid/perfectly plastic material depends upon the assumed yield criterion of the shell material. Close bounds on the interaction curve are found when the material yields according to either the Tresca or Mises criterion.

Comments on “Automated Optimal Design of Frame Reinforced, Submersible, Circular, Cylindrical Shells” by M. Pappas and A. Allentuch

1974 ◽  
Vol 18 (02) ◽  
pp. 139-139
Author(s):  
H. Becker
Keyword(s):  
Cylindrical Shell ◽  
Optimal Design ◽  
Closed Form ◽  
Circular Cylindrical Shell ◽  
Minimum Weight ◽  
Cylindrical Shells ◽  
External Pressure ◽  
Circular Cylindrical Shells

Pappas and Allentuch in the title paper computerized the investigation of a minimum-weight, ring-stiffened, elastic circular cylindrical shell under external pressure and obtained results similar to those found by Gerard in closed form in 1961.

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.

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