Elastic-Plastic Buckling of Aluminum Cylindrical Shells Subjected to Axisymmetric Impulse Loads

1974 ◽  
Vol 41 (4) ◽  
pp. 985-988 ◽  
Author(s):  
D. L. Wesenberg
Keyword(s):  
Pulse Shaping ◽  
Pressure Pulse ◽  
Capacitor Bank ◽  
Cylindrical Shells ◽  
Computer Code ◽  
Plastic Buckling ◽  
Elastic Plastic ◽  
Fast Discharge ◽  
Circular Cylindrical Shells ◽  
Good Agreement

The elastic-plastic buckling of 6061-T4 aluminum, circular cylindrical shells is examined experimentally and analytically. Groups of shells with radius-to-thickness ratios of 100, 200, and 300 were loaded with short-duration axisymmetric pressure pulses. A fast-discharge capacitor bank and current pulse shaping technique are utilized to provide a sine-squared pressure pulse with duration of about 5 μsec, a duration sufficiently short that loading can be considered impulsive. Average peak-to-peak permanent buckling deformations and wave numbers are compared with predictions from a Lagrangian, finite-difference computer code, and good agreement is obtained between measurements and predictions.

Investigation on the Influence of Stiffener Size on the Buckling Pressures of Circular Cylindrical Shells Under Hydrostatic Pressure

1962 ◽  
Vol 6 (03) ◽  
pp. 24-32
Author(s):  
James A. Nott
Keyword(s):  
Cylindrical Shells ◽  
High Strength ◽  
Plastic Buckling ◽  
Theoretical Derivation ◽  
Perfectly Plastic ◽  
Plastic Materials ◽  
Simple Support ◽  
Circular Cylindrical Shells ◽  
Support Conditions ◽  
Elastic Perfectly Plastic

A theoretical derivation is given for elastic and plastic buckling of stiffened, circular cylindrical shells under uniform external hydrostatic pressures. The theory accounts for variable shell stresses, as influenced by the circular stiffeners, and critical buckling pressures are obtained for simple support conditions at the shell-frame junctures. Collapse pressures for both elastic and plastic buckling are determined by iteration and numerical minimization. The theory is applicable to shells made either of strain-hardening or elastic-perfectly plastic materials. Using the developed analysis, it is shown that a variation in stiffener size can change the buckling pressures. Test data from high-strength steel and aluminum cylinders show agreement between the theoretical and experimental collapse pressures to within approximately six percent.

Dynamic Buckling Behaviors of Steel Cylindrical Shell Subjected to Conventional Explosion Impact Loading

2013 ◽  
Vol 800 ◽  
pp. 196-200
Author(s):  
Ji Chong ◽  
Fu Yin Gao ◽  
Xing Hua Li
Keyword(s):  
Numerical Simulation ◽  
Cylindrical Shell ◽  
Cylindrical Shells ◽  
Computer Code ◽  
Dynamic Buckling ◽  
Nonlinear Dynamic Response ◽  
Explosion Loading ◽  
Series Of Experiments ◽  
Steel Cylindrical Shell ◽  
Good Agreement

Experimental and numerical simulation researches were presented on dynamic buckling behaviors of cylindrical shell subjected to explosion loading.An account is given of some principal observations made from a series of experiments in which steel cylindrical shells were subjected to central impact by 200g cylindrical TNT dynamite with different distances.By means of an finite element computer code LS-DYNA,the nonlinear dynamic response process of the cylindrical shells subjected to explosion loading were numerically simulated with Lagrangian-Eulerian coupling method. The numerical simulation results were in good agreement with experimental data. The results provide a reference for the design of explosion-resisting structures.

Remarks on Donnell’s Equations

1955 ◽  
Vol 22 (1) ◽  
pp. 117-118
Author(s):  
Joseph Kempner
Keyword(s):  
Differential Equations ◽  
Cylindrical Shells ◽  
Radial Line ◽  
Line Load ◽  
Simply Supported ◽  
Circular Cylindrical Shells ◽  
Line Loads ◽  
Good Agreement

Abstract Flügge’s set of differential equations of equilibrium for circular cylindrical shells is expressed in a form analogous to the Donnell equations. The results of solutions of the two sets of equations for a simply supported cylinder under a centrally applied, uniformly distributed radial line load over a generator segment, as well as under sinusoidally applied line loads, are in very good agreement for the particular geometry investigated.

Inelastic Behavior of Finite Circular Cylindrical Shells

1977 ◽  
Vol 99 (1) ◽  
pp. 31-38 ◽  
Author(s):  
J. M. Chern ◽  
D. H. Pai
Keyword(s):  
Elevated Temperature ◽  
Thermal Stresses ◽  
Structural Model ◽  
Cylindrical Shells ◽  
Test Facility ◽  
Inelastic Behavior ◽  
Elastic Plastic ◽  
Inelastic Analysis ◽  
Circular Cylindrical Shells ◽  
Plastic Creep

In the design of elevated temperature components such as those encountered in Liquid Metal Fast Breeder Reactor (LMFBR) service, the designer/analyst is often faced with the task of having to assess structural adequacy of pressure vessel and piping components which experience high cyclic thermal stresses. Expensive and time consuming detailed inelastic analyses using finite element techniques are often necessary for such an assessment. Experience with the design of the LMFBR components has focused on an urgent need for simplified inelastic analysis methods which can aid the designer/analyst in scoping the design and minimize the number of parts requiring detailed inelastic analysis. Through its participation in the FFTF (Fast Flux Test Facility) and CRBRP (Clinch River Breeder Reactor Plant), Foster Wheeler Energy Corporation has developed a series of simplified analysis computer programs. The underlying philosophy in this work has been to make simplifying assumptions on the structural model but to solve the resulting boundary value problem as exactly as practicable so that approximations in the stress state or constitutive equations are not introduced. This paper is the third in a series [1, 11] by the authors dealing with the elastic-plastic-creep behavior of cylindrical structures. A rate formulation is presented for the elastic-plastic-creep analysis of finite circular cylindrical shells with various end conditions subjected to varying axisymmetric pressure loads, through-the-wall and along-the-length temperature gradients, and either axial loads or axial deformations. The solution procedure is based on direct integration and successive approximation and shown to be efficient in dealing with complicated loading histories. Applications of the present method of analysis are illustrated by numerical examples of elevated temperature design problem.

Sign in / Sign up

Export Citation Format

Share Document