Elastic-Plastic Axisymmetric Failure of Swedge-Stiffened Cylindrical Pressure Hull Under External Pressure

1993 ◽  
Vol 37 (02) ◽  
pp. 176-188
Author(s):  
Cho-Chung Liang ◽  
Ming-Fung Yang ◽  
Hung-Wen Chen
Keyword(s):  
Hydrostatic Pressure ◽  
Plastic Zone ◽  
Nonlinear Analysis ◽  
External Pressure ◽  
Geometrically Nonlinear ◽  
Pressure Loading ◽  
Geometrically Nonlinear Analysis ◽  
Elastic Plastic ◽  
Load Displacement ◽  
Distribution Of Stresses

An elastoplastic and geometrically nonlinear analysis of two of Ross's swedge-stiffened pressure hulls subjected to hydrostatic pressure loading is presented. Three commonly used swedge forms—trapezoidal, triangular, and sinusoidal-shaped—are considered. Comparisons on the responses of these three swedge-stiffened shapes are included. The load/displacement relations as well as the distribution of stresses with plastic zone spread phenomena are also illustrated.

A Three-Dimensional Geometrically Nonlinear Analysis of Pipelaying in an Ocean Environment

1981 ◽  
Vol 103 (2) ◽  
pp. 201-205
Author(s):  
S. Odorizzi ◽  
B. A. Schrefler
Keyword(s):  
Hydrostatic Pressure ◽  
Nonlinear Analysis ◽  
Dimensional Analysis ◽  
Three Dimensional ◽  
Bending Stiffness ◽  
Ocean Floor ◽  
Geometrically Nonlinear ◽  
External Hydrostatic Pressure ◽  
Geometrically Nonlinear Analysis ◽  
Ocean Environment

A three-dimensional analysis for pipelines suspended between the ocean floor and a laying barge or a stinger is presented. The analysis performed is capable of handling not only variations in bending stiffness, weight and buoyancy, crosscurrents and lateral bay drift, but also the effects of external hydrostatic pressure and buckling of the pipes. For this purpose a total Lagrangian geometrically nonlinear analysis in space. Examples are given which demonstrate the versatility of the analysis proposed.

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