Download or read book Analysis of the Buckling Process of Circular Cylindrical Shells Under Axial Compression written by Roderick Clarence Tennyson and published by . This book was released on 1968 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geometrically 'near-perfect' circular cylindrical photoelastic shells having radius-to-thickness ratios of the order 100 - 440 were tested in pure axial compression. The critical buckling loads were found to agree within 10 - 14% of the classical value, or within a few percent of the reduced buckling load taking into account the clamped end constraint. High speed photographs of the buckling process were obtained using two cameras viewing the change in the 45 deg isoclinics over the entire cylinder's length and over 60% of the cylinder's perimeter. A theoretical analysis of the inception of buckling using Koiter's mode shapes demonstrated that the classical buckling mode was observed in the experiments for the first time. Further investigation of the nonlinear postbuckling mode shapes just after initial buckling predicted the wave forms observed. It was also determined that the shallow shell equations used to describe the large-deflection postbuckling behaviour do not predict isoclinic patterns which are observed in the later stages of buckling. (Author).
Download or read book Elastic Stability of Circular Cylindrical Shells written by N. Yamaki and published by Elsevier. This book was released on 1984-02-01 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: The object of this book is to clarify the whole aspect of the basic problems concerning the elastic stability of of circular cylindrical shells under typical loading conditions. The book deals with buckling, postbuckling and initial postbuckling problems under one of the three fundamental loads, that is, torsion, pressure and compression. The emphases are placed on the accurate analysis and comprehensive numeral results for the buckling problem, experimental verification of the theoretical analysis for the postbuckling problem and clarification of the range of applicability of the perturbation method for the analysis of initial postbuckling behaviors and imperfection sensitivity. The problems under typical combined loads as well as the influence of the contained liquid are also clarified.
Download or read book The Preferred Mode Shape in Linear Buckling Analysis of Circular Cylindrical Shells Under Uniform Axial Compression written by P. Mann-Nachbar and published by . This book was released on 1964 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chessboard buckle pattern in the solution of the linearized Donnell equations for buckling of a thin, cylindrical shell under axial compression is so sensitive to uncertainties in shell dimensions that the number of circumferential waves and the aspect ratio of the buckles is indeterminate. This problem is treated statistically. Shell dimensions are treated as random variables with probability distributions dependent on nominal values and manufacturing tolerances. Distributions for aspect ratio and number of circumferential waves are found by a Monte-Carlo technique. It is found that the linear theory does contain a mechanism for distinguishing among buckle shapes; there is always a preferred buckle shape. For thin shells and attainable manufacturing tolerances, the aspect ratio of the preferred shape is near one, and the corresponding number of buckles is large. (Author).
Download or read book Experimental Study of the Creep Buckling of Circular Cylindrical Shells Under an Axially Applied Compression written by Stanford University. Department of Aeronautics and Astronautics and published by . This book was released on 1965 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of electroforming to produce circular cylindrical shells is described. Examples are cited for which the use of electroforming provides opportunities for the development of unique specimen designs and test procedures. The use of a tapered creep specimen to generate isochronous stress-strain curves is described. The procedure developed provides a method for deriving basic creep relationships form data obtained from a small number of tests. The results of creep buckling tests on circular cylindrical shells under axial compression are presented. The basic features described are the end-shortening history, the variation of buckling load with time, and the post-buckling pattern which is developed. (Author).
Download or read book Buckling Analysis of Laminated Composite Circular Cylindrical Shells written by James G Harper (II.) and published by . This book was released on 1978 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of prebuckling displacements on the buckling 8 OF LAMINATED COMPOSITE CIRCULAR CYLINDRICAL SHELLS ARE INVESTIGATED. Both axial compression and pure torsion are considered for two shell geometries. A clamped prebuckling boundary condition is used for all analysis with four buckling boundary conditions applied during the buckling process. The shell walls are made up of a 6 ply laminate with several symmetric ply orientations. The study was made using the STAGS computer code, utilizing the linear bifurcation branch with linear prebuckling displacements. The results are compared to the buckling loads determined when prebuckling displacements are neglected. It is shown that prebuckling deformations generally tend to decrease the buckling load of a composite shell. Increased buckling loads can occur under axial compression with prebuckling displacements ASSUMED PRESENT, FOR PARTICULAR PLY ORIENTATIONS, DUE TO A HIGHER BENDING STIFFNESS. Similarly, under torsion, an increase in buckling load can occur because of a higher tension hoop stress. It is also shown that prebuckling displacements can cause shell buckling before failure of the fibers occurs. (Author).
Download or read book The Effect of Axial Constraint on the Instability of Thin Circular Cylindrical Shells Under Uniform Axial Compression written by Josef Singer and published by . This book was released on 1961 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of axial elastic restrain on the instability of a circular cylindrical shell under uniform axial compression is analysed by a Rayleigh Ritz approach within the bounds of linear theory. The effect is calculated for a wide range of parameters and design curves are presented for the percentage increase in critical load. The analysis is carried out for restraints which are active from the beginning of loading and for such which come into action only at the onset of buckling. (Author).
Download or read book Perplexing Behavior of Thin Cylindrical Shells in Axial Compression written by Stanford University. Department of Aeronautics and Astronautics and published by . This book was released on 1966 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Study of the Creep Buckling of Moderately Thin walled Circular Cylindrical Shells Subjected to Axial Compression written by Michel Benoit and published by . This book was released on 1970 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Test equipment suitable for the study of the creep buckling of axially compressed circular cylindrical shells was developed and built. With the aid of this equipment, thirty-one electroformed nickel cylinders of radius-to-thickness ratios ranging from 30.6 to 96.4 were tested at a temperature of 650F. The loading of each specimen was interrupted usually once, and in some cases twice, to permit an exact measurement of the creep deformations produced by the axial compression. Diagrams showing the deformed shapes of eight generators of each specimen are presented at two or three stages of the creep buckling process. Inspection of the figures reveals that specimens of this kind either buckle axisymmetrically, or begin the creep buckling process in a axisymmetric manner but change over to a multilobed pattern in later stages of the deformations. (Author).
Download or read book Buckling of Circular Cylindrical Shells Under Pure Axial Compression written by Frederick E. Hedberg and published by . This book was released on 1991 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On Edge Buckling of Axially compressed Circular Cylindrical Shells written by Stanford University. Department of Aeronautical Engineering and published by . This book was released on 1961 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Five Papers on the Buckling of Thin Walled Circular Cylindrical Shells Under Axial Compression written by Chalmers Tekniska Högskola, Institutionen för Konstruktionsteknik and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Nonlinear Analysis of the Buckling of Circular Cylinders Subjected to Axial Compression and Internal Pressure written by Don O. Brush and published by . This book was released on 1957 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Creep Buckling of Axially Compressed Circular Cylindrical Shells written by Bernard Robert Schneider and published by . This book was released on 1966 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of creep induced instability in structures is discussed. A linearization procedure proposed by Onat and Wang (Creep in Structures, Springer-Verlag, 1962, p. 125) and generalized by Carlson (Recent Progress in Applied Mechanics - The Folke Odgvist Volume, Almqvist and Wiksell, Gebers, Stockholm, 1966) is applied to the problem of the creep buckling of circular cylindrical shells under uniform, axial compression. Solutions for axisymmetric creep buckling of semi-infinite and infinite cylinders are obtained and a comparison with experimental data is made. In accordance with expectations based on the criterion for instability, the theoretically predicted critical times are smaller than the experimentally observed critical times.
Download or read book Report written by Lars P. Mikkelsen and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Mechanism of Buckling of a Circular Cylindrical Shell Under Axial Compression written by Y. Yoshimura and published by . This book was released on 1955 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present paper deals with the buckling of a circular cylindrical shell under axial compression from the viewpoint of energy and the characteristics of deformation. It is shown first, both theoretically and experimentally, that the reason why the buckling of a cylindrical shell is quite different from that of a flat plate is attributable to the existence of a nearly developable surface far apart from the original cylindrical surface. Based upon this result, the experimental fact that the buckling is really not general but local, that is, that the buckled region is limited axially to a range of 1.5 times the wave length of the lobe, is explained by the theoretical result that the minimum buckling load is smaller in the local buckling than in the general buckling case. The occurrence of local buckling is affirmed also from the viewpoint of the energy barrier to be jumped over during buckling, and from a comparison of the theoretical post-buckling state with the experimental results. Finally, the local buckling with the load applied by a spring is analyzed, and it is proved that the minimum buckling load increased with an increase of rigidity of the spring.
Download or read book Buckling of Thin Shells written by Stanford University. Department of Aeronautical Engineering and published by . This book was released on 1961 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Buckling Load of Thin Circular Cylindrical Shells Formed by Plastic Expansion written by LeRoy R. Guist and published by . This book was released on 1971 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was made to determine the axial buckling load of cylinders formed by a process of plastic expansion due to internal pressure. Test cylinders 21.6 cm in diameter, 0.330 mm thick, were formed by plastic expansion from 15.23 cm diameter commercial, welded, type 304 stainless steel tubing. Buckling loads from 50 to 71 percent of the classical value showed a definite relationship with the local decrease in curvature due to the worst imperfections. Buckling loads were substantially higher than expected in relation to the amplitude of their geometric imperfections. The results indicate that the process of plastic expansion may provide a means of producing certain types of cylinders of unusually high buckling load at low cost.
