Download or read book A Note on the Dynamic Instability of Stiffened Cylindrical Shells written by Jerome M. Klosner and published by . This book was released on 1968 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamic instability of long, stiffened circular cylindrical shells subjected to time-independent loads is investigated. It is assumed that the stiffeners are spaced sufficiently close so that their properties can be averaged out. The equations of motion of the structure is determined by using a nonlinear orthotropic shell theory of the Karman-Tsien type. An approximate deflection function with time-dependent coefficients is assumed and a Ritz-Galerkin procedure applied to yield four coupled, nonlinear differential equations. These equations are solved numerically for an applied axial compressive load. A dynamic buckling instability criterion is established. (Author).
Download or read book Dynamic Stability of Structures written by George J. Simitses and published by . This book was released on 1982 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report deals primarily with extension of the energy-based concepts of dynamic stability, developed earlier for finite-degree-of-freedom systems, to continuous systems. Moreover, the related criteria for dynamic stability are demonstrated through several structural configurations, such as eccentrically loaded simple two-bar frames, geometrically imperfect, thin, cylindrical shells (of stiffened and unstiffened construction) and subjected to uniform axial compression and lateral pressure, and a pinnted, half-sine, shallow arch loaded transversely. All of these systems are subject to violent buckling under static application of the loads. Moreover, the developed concepts are extended, so as to apply to structural systems, which are either subject to smooth buckling or are not subject to buckling at all under static loading.
Download or read book The General Instability of Eccentrically Stiffened Cylindrical Shells Under Axial Compression and Lateral Pressure written by John N. Dickson and published by . This book was released on 1969 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Collected Papers on Instability of Shell Structures 1962 written by NASA Symposium on Instability of Shell Structures and published by . This book was released on 1962 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Stability of Suddenly Loaded Structures written by George J. Simitses and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic instability or dynamic buckling as applied to structures is a term that has been used to describe many classes of problems and many physical phenomena. It is not surprising, then, that the term finds several uses and interpretations among structural mechanicians. Problems of parametric resonance, follower-force, whirling of rotating shafts, fluid-solid interaction, general response of structures to dynamic loads, and several others are all classified under dynamic instability. Many analytical and experimental studies of such problems can be found in several books as either specialized topics or the main theme. Two such classes, parametric resonance and stability of nonconservative systems under static loads (follower-force problems), form the main theme of two books by V. V. Bolotin, which have been translated from Russian. Moreover, treatment of aero elastic instabilities can be found in several textbooks. Finally, analytical and experimental studies of structural elements and systems subjected to intense loads (of very short duration) are the focus of the recent monograph by Lindberg and Florence. The first chapter attempts to classify the various "dynamic instability" phenomena by taking into consideration the nature of the cause, the character of the response, and the history of the problem. Moreover, the various concepts and methodologies as developed and used by the various investigators for estimating critical conditions for suddenly loaded elastic systems are fully described. Chapter 2 demonstrates the concepts and criteria for dynamic stability through simple mechanical models with one and two degrees of freedom.
Download or read book Proceedings of the Army Symposium on Solid Mechanics 1972 written by and published by . This book was released on 1973 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Stability of Cylindrical Shells of Various Constructions written by Xiaozhi Huyan and published by . This book was released on 1996 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research in Progress written by and published by . This book was released on 1967 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Instability of Circular Cylindrical Shells Having Viscoelastic Cores written by Carl Zweben and published by . This book was released on 1966 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigatin has been made to determine the stablizing effects of viscoelastic cores on the response of long, circular cylindrical shells subjected to time-dependent axial loads. A small strain-large rotation shell theory of the Karman-Tsien type, in which only the radial inertia terms are included, is employed to analyze the shell. The core response is determined by applying the Laplace transform to the three-dimensional, linear, viscoelastic field equations in which all inertia terms are neglected. Coupling of the structural elements is obtained by requiring that the radial displacements be compatible and that the shearing stresses vanish at the interface. (It has been shown that the most important stabilizing effect comes from the radial stress and that the shearing stress between the core and the shell can be negleced.) The radial shell deflection is approximated by using a four-term deflection functionh having time-dependent coefficients. By appealing to Hamilton's principle, a system of four coupled integro-differential equations of these coefficients is obtained. A numerical integration procedure is then used to solve these equations. Studies have been made of the magnitude of the critical loads as a function of both the initial shell imperfections and the time duration of loading.
Download or read book NASA Technical Note written by and published by . This book was released on 1967 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On Free Vibrations of Eccentrically Stiffened Cylindrical Shells and Flat Plates written by Martin M. Mikulas and published by . This book was released on 1965 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the General Instability of Ring stiffened Cylindrical Shells Under the Action of Radial External Pressure and Axial Compression written by Sesto Joseph Voce and published by . This book was released on 1965 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Stability and Non linear Oscillations of Cylindrical Shells plain Strain Subjected to Impulsive Pressure written by Ivor Keen McIvor and published by . This book was released on 1962 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The equations of motion for large deformation of a thin elastic cyl ndrical shell are derived and simplified to a form second order theory which is adequate for investigating the dynamic stability of the shell. A review of linear vibrations is presented. The response of a cylindrical shell to a uniform impulsive pressure is investigated. It is found that the circular mode of vibration, which is the basic response of the shell, may be unstable, the shell going over into bending modes of vibration. A criterion is established for predicting the bending modes excited. It is shown that the type of instability involved corresponds to what is known as autoparametric excitation in non-linear oscillations. Uniform impulsive pressure of sufficient magnitude to cause inward plastic flow is considered. The analysis is carried out for a stress-strain relation which includes purely viscous, viscoplastic, and linear strain hardening materials as special cases. It is shown that a series of wrinkles develop around the circumference as the shell flows inward. The wrinkling arises from magnification of the irregularities in the initial radial velocity due to the compressive membrane force in the shell. (Author).
Download or read book Dynamic Stability of Cylindrical Shells Under Step Loading written by Yukio Stephen Tamura and published by . This book was released on 1973 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made to determine the dynamic stability of an imperfect circular cylindrical shell subject to a step loading in the axial direction. In the analysis, the radial displacement of the shell is approximated by a finite degree of freedom system. To assure that the created model is proper, its static buckling behavior was studied. It was found that the model gives the proper imperfection sensitivity behavior. (Modified author abstract).
Download or read book Dynamic Stability of Cylindrical Shells Under Static and Periodic Axial and Radial Loads written by JOHN C. YAO and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several cases of the dynamic stability problem for cylinders are solved explicitly. Combinations of the static and periodic radial and axial loads are considered. The regions of instability and stability are established directly in terms of the geometry of the cylinder, load intensity, and frequency. All the numerical results obtained here tend to indicate that a cylinder designed according to the static buckling load can withstand an additional periodic load. It was found that the ratio of additional periodic load to the static buckling load was greater for a thin cylinder than for a thicker cylinder of the same radius. It was also found that the resistance of a cylinder to loads in excess of the static buckling load increases with increasing frequency of loading. (Author).
Download or read book General Instability of Ring stiffened Cylindrical Shells Subject to External Hydrostatic Pressure written by Thomas E. Reynolds and published by . This book was released on 1959 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
