Stability of Heterogeneous Anisotropic Cylindrical Shells Under Combined Axial Compression and Bending PDF Download

Author: Abdurrahim Cahit Ugural
Publisher:
ISBN:
Category : Cylinders
Languages : en
Pages : 130

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Author: A. Holston (Jr.)
Publisher:
ISBN:
Category : Bending
Languages : en
Pages : 164

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Book Description
A combined analytical and experimental investigation of the stability of composite cylindrical shells is presented. Forty-five fiber-glass filament wound cylinders were fabricated, buckled, and analyzed. The number 45 stems from considering three diameters (6 in, 12 in, 24 in), three filament configurations, and five loadings. All cylinders had essentially the same wall thickness, .035 in, and each cylinder length was nearly equal to its diameter. The five loadings were: (1) uniform axial compression, (2) torsion, (3) bending, (4)combined torsion and uniform axial compression, (5) combined bending and uniform axial compression. The analysis was based on linear anisotropic shell theory and the effects of boundary conditions were not considered. Preliminary tests were conducted to determine the in-plane stiffnesses and individual layer elastic properties. The experimental buckling loads were from 67 to 90% of predicted values for loading without torsion. The bending buckling stress was, for all practical purposes, equal to the axial buckling stress and the combined bending with uniform axial load interaction was essentially linear. The experimental torsion buckling loads were greater than the predicted values but the boundary conditions were not considered in the analysis. Buckling loads were computed for boron filament wound cylinders of the same size and winding configurations. These computations show that the buckling loads of boron and aluminum cylinders, of the same size, are nearly equal. A similar comparison on a weight basis would produce the same result since their densities are essentially equal.

Author: D. Bushnell
Publisher: Springer Science & Business Media
ISBN: 9789024730995
Category : Science
Languages : en
Pages : 456

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Book Description
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.

Author: David Bushnell
Publisher:
ISBN:
Category : Buckling (Mechanics)
Languages : en
Pages : 810

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Author: Dalip Singh Chehil
Publisher:
ISBN:
Category : Buckling
Languages : en
Pages : 166

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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 772

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Book Description

Author: Suong V. Hoa
Publisher: Routledge
ISBN: 1351466755
Category : Technology & Engineering
Languages : en
Pages : 423

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Book Description
First published in 1991. CRC Press is an imprint of Taylor & Francis.

Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 276

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Book Description

Author: American Institute of Aeronautics and Astronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1112

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Book Description

Author: F. W. Wendt
Publisher: Elsevier
ISBN: 1483147797
Category : Technology & Engineering
Languages : en
Pages : 903

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Book Description
Mechanics of Composite Materials contains the proceedings of the Fifth Symposium on Naval Structural Mechanics held in Philadelphia, Pennsylvania, on May 8-10, 1967. The papers explore the mechanics of composite materials for naval applications. The structural requirements of a system and the fundamental mechanical properties of composite materials, as well as the behavior of such materials under various environmental conditions, are discussed. This book is comprised of 40 chapters and begins with an analysis of missile and aircraft systems constraints and operational requirements, along with ship systems constraints and operational requirements, for composite materials. The following chapters focus on structural uses of composites, particularly in naval ships, aircraft, re-entry vehicles, and space vehicle structures; and the micromechanics, structural mechanics, and failure mechanics of composite materials. Problems in the design of joints and attachments are considered, along with the stability of pre-strained laminated media; environmental factors in the design of composite materials; and the effect of water on glass-reinforced plastics. This monograph will be a useful resource for scientists and engineers who are particularly concerned with the mechanics of composite materials.