Download or read book Initial Postbuckling Behavior of Thin Cylindrical Shells Under Pure Bending and Effect of Initial Antisymmetric Imperfection on the Buckling Moment written by Mohamed Abu-Ajeila Elmabruk and published by . This book was released on 1983 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Initial Postbuckling Behavior of Thin Cylindrical Shells Under Pure written by Mohamed Abu-Ajeila Elmabruk and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Buckling and Postbuckling Studies of Moment Loaded Thin Wall Cylindrical Shells with Cutouts written by Cheng-Hwa Francis Chiang and published by . This book was released on 1974 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of the prebuckling, incipient buckling, and postbuckling behavior of thin-wall aluminum cylindrical shells with a nominal R/h of 100 and subjected to pure bending is reported. The investigation includes initially-undamaged and cutout-predamaged cylindrical shells. The types of predamage include: (a) a single circular hole (three different diameters were employed) and (b) a single slotted hole of fixed size and aspect ratio but oriented axially (phi = 0 degrees), obliquely (phi = 45 degrees), or circumferentially (phi = 90 degrees). Emphasis is given to studying the load-deflection behavior and the associated buckling patterns in the postbuckling range, for both monotonically-increasing angular deflections of the buckled region and unloading-reloading behavior. Load-deflection characteristics and buckling patterns distinctive to each type of specimen tested are presented for bending rotations extending to about 15-20 degrees. (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 Postbuckling Behavior Of Plates And Shells written by Hui-shen Shen and published by World Scientific. This book was released on 2017-01-13 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: As an expert in structure and stress analysis, the author has written extensively on functionally graded materials (FGMs), nonlinear vibration and dynamic response of functionally graded material plates in thermal environments, buckling and postbuckling analysis of single-walled carbon nanotubes in thermal environments. This book provides a comprehensive overview of the author's works which include significant contributions to the postbuckling behavior of plates and shells under different loading and environmental conditions.This book comprises eight chapters. Each chapter contains adequate introductory material so that an engineering graduate who is familiar with basic understanding of plates and shells will be able to follow it.
Download or read book Initial Postbuckling Behavior of Stiffened Cylindrical Shells written by D. O. Brush and published by . This book was released on 1967 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theory developed by W.T. Koiter for the initial postbuckling behavior of thin-walled shells is applied in an analysis of the imperfection sensitivity of ring-and-stringer stiffened cylinders subjected to axial compression. The cylinders are considered to be simply supported, and both eccentricity and torsional rigidity of stiffeners are taken into account. Values of a so-called imperfection sensitivity parameter are determined for particular stiffened cylinders, and the suitability of the parameter as a practical measure of imperfection sensitivity is examined. Theoretical results are correlated with available data for the experimental buckling loads of stringer stiffened cylinders. The evidence for the suitability of the parameter as a practical measure of imperfection sensitivity is judged to be promising but not conclusive. (Author).
Download or read book Post buckling Behavior of Cylindrical Shells written by Alekseĭ Vasilʹevich Pogorelov and published by . This book was released on 1964 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Buckling and Initial Postbuckling of Oval Cylindrical Shells Under Combined Axial Compression and Bending written by Joseph Kempner and published by . This book was released on 1972 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Buckling and initial postbuckling of an oval cylindrical shell under pure bending and under combined uniform axial compression and bending is investigated. The first and second order stability equations are developed from the Donnell-type equations which are shown to be appropriate. The solution of these two sets of equations determines, respectively, the buckling characteristics and a 'sensitivity parameter'. The buckling loads are found to be in good agreement with the engineering approximation based upon the assumption that buckling occurs when the local axial stress equals that corresponding to the classical buckling stress of a locally equivalent circular cylindrical shell under uniform axial compression. (Author).
Download or read book ASME 67 APM W written by J. W. Hutchinson and published by . This book was released on 1967 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Buckling and Postbuckling Studies of Torsion Loaded Thin Wall Cylindrical Shells with Cutouts written by John Sigmund Strenkowski and published by . This book was released on 1973 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: ENTAL STUDY OF THE PRE-BUCKLING AND POSTBUCKLING BEHAVIOR OF THIN ALUMINUM CYLINDRICAL SHELLS WITH R/h of 100 under a pure applied torque is reported. The investigation includes initially-undamaged and pre-damaged cylindrical shells. The types of predamage include a single circular 1-inch diameter hole, and a single size rectangular slot (3/8-inch wide and 2.10-inch long) with orientations of 0, 45, and 90 degrees to the longitudinal axis of the cylindrical shell. Postbuckling behavior of these specimens is investigated for large twist angles, for both monotonically-increasing angular deflections and for unloading-reloading behavior. Load-deflection characteristics and buckling patterns distinctive to each type of specimen tested are presented. Finally, comments are offered on idealizing these buckling patterns for possible use in the future development of approximate methods for predicting these types of postbuckling load-deflection behavior. (Author).
Download or read book Snap through and Postbuckling Equilibrium Behavior of Circular Cylindrical Shells Under Axial Load written by Stanford University. Department of Aeronautics and Astronautics and published by . This book was released on 1965 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis was begun with an investigation of the effect that a more accurate displacement assumption, in conjunction with the exact strain-displacement relations, has on the postbuckling equilibrium behavior. It was hoped that the limiting behavior of wall thickness and wave number parameter would be altered, and that the stress coefficient would not tend to zero. Particular attention was given to an exact representation of membrane strains because it was known that in the limit as the radius-to-thickness ratio of the shell approaches infinity, the displacements approach the inextensional polyhedral surface. While all the strains in the middle surface of this limiting polyhedral shell are zero, the Donnell strain-displacement relations yield strains amounting to 0.1% if the number of waves around the circumference is 10. The results obtained did not differ significantly from the Donnell strain-displacement relations. (Author).
Download or read book Computerized buckling analysis of shells written by D. Bushnell and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the work performed by Lockheed Palo Alto Research Labora tory, Palo Alto, California 94304. The work was sponsored by Air Force Office of Scientific Research, Bolling AFB, Washington, D. C. under Grant F49620-77-C-0l22 and by the Flight Dynamics Laboratory, Air Force Wright Aeronautical Laboratories, Wright-Patterson AFB, Ohio under Contract F3361S-76-C-31OS. The work was completed under Task 2307Nl, "Basic Research in Behavior of Metallic and Composite Components of Airframe Structures". The work was admini stered by Lt. Col. J. D. Morgan (AFOSR) and Dr. N. S. Khot (AFWAL/FIBRA). The contract work was performed between October 1977 and December 1980. The technical report was released by the Author in December 1981. Preface Many structures are assembled from parts which are thin. For example, a stiffened plate or cylindrical panel is composed of a sheet the thickness of which is small com pared to its length, breadth, and stiffener- spacing, and stiffeners the thickness of which is small compared to their _ heights and lengths. These assembled structures, loaded in compression, can buckle overall, that is sheet and stiffeners can collapse together in a general instability mode; the sheet can buckle locally between stiffeners; the stiffeners can cripple; and a variety of complex buckling interactions can occur involving local and overall deformations of both sheet and stiffeners. More complex, built-up structures can buckle in more complex and subtle ways.
Download or read book Perturbation Solutions for the Buckling Problem of Axially Compressed Thin Cylindrical Shells written by Stanford University. Department of Aeronautics and Astronautics and published by . This book was released on 1966 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analog Study of the Thermal Buckling Behavior of Thin Cylindrical Shells written by Stanford University. Department of Aeronautics and Astronautics and published by . This book was released on 1965 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple beam-column model is utilized to study the thermal buckling behavior of similar shells. Closed-form solutions of the governing differential equation are presented for the cases of simply-supported ends and clamped ends. Numerical calculations are performed and the data obtained used to construct equilibrium curves relating the axial load to the axial end shortening and to the midlength lateral deflection. The theoretical curves obtained for the clamped beam-column are in good qualitative agreement with the experimental curves recorded in an equivalent problem of a previous investigation. (Author).
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1969 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Buckling and Failure of Compression Loaded Composite Cylindrical Shells with Geometric and Material Imperfections written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of an experimental and numerical study of the effects of initial imperfections on the buckling response and failure of unstiffened thin-walled compression-loaded graphite-epoxy cylindrical shells are presented. The shells considered in the study have six different orthotropic or quasi-isotropic shell-wall laminates and two different shell-radius-to-thickness ratios. The numerical results include the effects of geometric shell-wall mid-surface imperfections, shell-wall thickness variations, local shell-wall ply-gaps associated with the fabrication process, shell-end geometric imperfections, nonuniform end loads, and the effects of elastic boundary conditions. Selected cylinder parameter uncertainties were also considered. Results that illustrate the effects of imperfections and uncertainties on the nonlinear response characteristics, buckling loads and failure the shells are presented. In addition, a common failure analysis is used to predict material failures in the shells.Hilburger, Mark W. and Starnes, James H., Jr.Langley Research CenterBUCKLING; DEFECTS; COMPOSITE MATERIALS; FAILURE ANALYSIS; CYLINDRICAL SHELLS; ISOTROPY; SHELLS (STRUCTURAL FORMS); BOUNDARY CONDITIONS; LOADS (FORCES)
Download or read book Effect of End Conditions on Buckling of Cylindrical Shells Under Axial Compression Impact written by A. P. Coppa and published by . This book was released on 1967 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimentally observed effects of edge conditions on the buckling behavior of cylindrical shells under axial compression impact are presented. Three effects are discussed, namely, those due to (1) inward radial displacement restraint of the shell wall, (2) asymmetry of the applied loading resulting from obliquity between the impact plate and the end cross section plane of the shell, and (3) impact velocity. It is shown that restraint of an initially free edge against inward radial displacement has two prominent effects: (a) to produce moderate increase in the buckling load, and (b) to force the formation of symmetrical buckling modes local to the restraint even for shells which tend to buckle in the asymmetrical mode. Another result is that although the initial response can be strongly influenced by the edge condition, the subsequent response can be virtually independent of it. Loading asymmetry results in a relatively lower stress response, depending on the degree of asymmetry, and has the effect of circumventing the initial buckling process. Results obtained from impacts at velocities up to 400 ft/sec show that the buckling stresses can be substantially higher at higher velocities. The data suggest, however, that the range of velocity over which this trend occurs may be limited by the particular mechanical, thermal, and geometrical properties of the structure. Also, at sufficiently high velocities, the preferred buckling and collapse mode is symmetrical, even for thin, unpressurized shells. Several experimental novelties are discussed such as a strain gage attachment fixture by means of which back-to-back pairs of strain gages can be accurately and conveniently positioned and fastened to thin shells. A semiautomatic system for mapping the initial geometrical imperfections of shells is also described.
