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 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 Dynamic Instability of a Cylindrical Shell with an Elastic Core written by Jerome M. Klosner and published by . This book was released on 1966 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stabilizing effect of an elastic core on the response of a long, circular cylindrical shell with initial imperfections and subjected to time-dependent axial edge loads is investigated. The three-dimensional elastic field equations in which all inertia terms are neglected are used to derive the core response. A nonlinear shell theory of the Karman-Tsien type is utilized to derive the shell equations in which only the radial inertia terms are included. Coupling is effected by enforcing the condition that the radial displacements at the interface be compatible. It is also assumed that the interface shearing stresses vanish. The displacement of the cylinder is obtained by using an approximate deflection function having four time-dependent parameters. The application of Hamilton's principle yields four coupled differential equations on these four parameters which are solved numerically for a step edge-loading. The results are compared to those previously obtained for cylinders without cores. Additional results obtained for the coreless cylinders are also included. (Author).
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1970 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1986 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967 with total page 1352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Manuals of Engineering Practice written by and published by . This book was released on 1970 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by United States. National Congress of Applied Mechanics and published by . This book was released on 1966 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gaylor Technical Survey written by and published by . This book was released on 1967 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Engineering Technology and Applications written by Alessandro Ortis and published by Springer Nature. This book was released on 2023-12-22 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the Revised Selected Papers of the Second International Conference, ICAETA 2023, held in Istanbul, Turkey, during March 10–11, 2023. The 37 full papers included in this volume were carefully reviewed and selected from 139 submissions. The topics cover a range of areas related to engineering, technology, and applications. Main themes of the conference include, but are not limited to: Data Analysis, Visualization and Applications; Artificial Intelligence, Machine Learning and Computer Vision; Computer Communication and Networks; Signal Processing and Applications; Electronic Circuits, Devices, and Photonics; Power Electronics and Energy Systems.
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 Recent Research in Control Engineering and Decision Making written by Olga Dolinina and published by Springer. This book was released on 2019-01-28 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the full papers and short monographs developed on the base of the refereed proceedings of the International Conference on Information Technologies: Information and Communication Technologies for Research and Industry (ICIT-2019), held in Saratov, Russia in February 2019. The book brings accepted papers which present new approaches and methods of solving problems in the sphere of control engineering and decision making for the various fields of studies: industry and research, ontology-based data simulation, smart city technologies, theory and use of digital signal processing, cognitive systems, robotics, cybernetics, automation control theory, image recognition technologies, and computer vision. Particular emphasis is laid on modern trends, new approaches, algorithms and methods in selected fields of interest. The presented papers were accepted after careful reviews made by at least three independent reviewers in a double-blind way. The acceptance level was about 60%. The chapters are organized thematically in several areas within the following tracks: • Models, Methods & Approaches in Decision Making Systems • Mathematical Modelling for Industry & Research • Smart City Technologies The conference is focused on development and globalization of information and communication technologies (ICT), methods of control engineering and decision making along with innovations and networking, ICT for sustainable development and technological change, and global challenges. Moreover, the ICIT-2019 served as a discussion area for the actual above-mentioned topics. The editors believe that the readers will find the proceedings interesting and useful for their own research work.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements written by and published by . This book was released on 1971 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
