On the stress distribution near a stiffened elliptical opening in a cylindrical shell beyond the elastic limit

1999 ◽  
Vol 35 (5) ◽  
pp. 508-514
Author(s):  
V. P. Mulyar ◽  
E. A. Storozhuk ◽  
I. S. Chernyshenko
Keyword(s):  
Cylindrical Shell ◽  
Stress Distribution ◽  
Elastic Limit ◽  
Elliptical Opening

Stress distribution in flexible cylindrical shells with a circular cut beyond the elastic limit

1988 ◽  
Vol 24 (12) ◽  
pp. 1179-1183
Author(s):  
A. L. Kravchuk ◽  
E. A. Storozhuk ◽  
I. S. Chernyshenko
Keyword(s):  
Stress Distribution ◽  
Elastic Limit ◽  
Cylindrical Shells

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.

Stresses Around an Elliptic Hole in a Cylindrical Shell

1969 ◽  
Vol 36 (1) ◽  
pp. 39-46 ◽  
Author(s):  
M. V. V. Murthy
Keyword(s):  
Cylindrical Shell ◽  
Stress Distribution ◽  
Theoretical Analysis ◽  
Circular Cylindrical Shell ◽  
Elliptic Hole ◽  
Major Axis ◽  
Axial Tension ◽  
Method Of Solution ◽  
Bending Stresses ◽  
Curvature Parameter

A theoretical analysis is presented for the membrane and bending stresses around an elliptic hole in a long, thin, circular cylindrical shell with the major axis of the hole parallel to the axis of the shell. The analysis has been carried out for the case of axial tension. The method of solution involves a perturbation in a curvature parameter and the results obtained are valid, if the hole is small in size compared to the shell. Formulas, from which the complete stress distribution at the hole can be calculated, are presented.

scholarly journals The Thermoelastic Dynamic Response of Thick Closed Laminated Shell

2005 ◽  
Vol 12 (4) ◽  
pp. 283-291 ◽  
Author(s):  
Ke Wei Ding
Keyword(s):  
Cylindrical Shell ◽  
Stress Distribution ◽  
Dynamic Response ◽  
Thermal Stresses ◽  
Hamilton Equation ◽  
State Equations ◽  
Weak Formulation ◽  
Laminated Shell ◽  
Arbitrary Precision ◽  
Laminated Cylindrical Shell

Giving up any assumptions about displacement models and stress distribution, weak formulation of mixed state equations including boundary conditions of laminated cylindrical shell are presented. Thermal stresses mixed Hamilton equation of closed cylindrical shell is established. The analytical solutions are obtained for the thermoelastic dynamic response of a thick closed laminated shell subjected to temperature variation. Every equation of elasticity can be satisfied, and all elastic constants can be taken into account. Arbitrary precision of a desired order can be obtained.

scholarly journals A Numerical–Analytical Approach for the Preliminary Design of Thin-Walled Cylindrical Shell Structures with Elliptical Cut-Outs

Aerospace ◽  
2019 ◽  
Vol 6 (5) ◽  
pp. 52 ◽  
Author(s):  
Angela Russo ◽  
Andrea Sellitto ◽  
Salvatore Saputo ◽  
Valerio Acanfora ◽  
Aniello Riccio
Keyword(s):  
Cylindrical Shell ◽  
Stress Distribution ◽  
High Stress ◽  
Shell Structures ◽  
Geometrical Parameters ◽  
Preliminary Design ◽  
Loading Conditions ◽  
High Stress Concentration ◽  
Thin Walled ◽  
Electrical Cables

The presence of cut-outs within thin-walled shell structures is unavoidable, holes being needed for the passage of electrical cables, fuel, or just to reduce the weight of the components. Nevertheless, the high stress concentration can lead to a premature collapse of the structure. For this reason, the preliminary design of cylindrical shell structures with holes needs a profound knowledge of the stress distribution for different loading conditions and constraints. In this paper, a parametric study of a fiber-reinforced composite shell cylinder with an elliptical cut-out has been performed. Three different loading conditions were analyzed: Tension, bending, and torsion. Ansys® script, capable of easily generating and analyzing different geometrical configurations, was used to study the dependence of the geometry on the stress distribution near the cut-out. Finally, graphical and analytical relationships were tentatively extrapolated from numerical results, aimed at linking the geometrical parameters of the cut-out to the maximum stress near the cut-out.

Analysis and Comparison of Pad Reinforcement of Pressure Vessel by Elastic and Elastoplastic FEM

2007 ◽  
Author(s):  
Lihua Liang ◽  
Zengliang Gao ◽  
Yangjian Xu ◽  
Kangda Zhang ◽  
Zhaohui Fan
Keyword(s):  
Cylindrical Shell ◽  
Stress Distribution ◽  
Stress Analysis ◽  
Maximum Stress ◽  
Constitutive Relations ◽  
Contact Model ◽  
Integral Model ◽  
The Difference ◽  
Shell Intersections ◽  
Different Diameters

Considering reinforcement pad and the cylindrical shell as an integral model and a contact model, stress analysis for opening-reinforcement structures of a cylindrical shell is performed by elastic and elastoplastic FEM. By comparison of two sub-models and two material constitutive relations (elastic and elastoplastic), the stress distribution of cylindrical shell intersections by the contact model is similar to that by the integral model, but there are some differences of the stress at contact surfaces of the shell and the reinforcement pad between by the contact model and by the integral model. In general, the stress analysis of the integral model for pad reinforcement can approximately represent that of the contact model. Finite element analyses for different nozzle diameters and different oblique angles in nozzle and cylinder shell intersections are carried out. The stress distribution and the maximum stress are affected by oblique angle. But the difference of the maximum stress intensity among different diameters is small.

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