Download or read book The Buckling of Composite Cylindrical Panels Considering Environmental Effects written by Anthony D. Straw and published by . This book was released on 1985 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical study was conducted to determine the influence of moisture, temperature, and curvature on the bifurcation load of cylindrical, composite panels subjected to a simple shear loading. Two laminate ply orientations, (0/45/-45/90)s and (45/-452)s, were analyzed for six radii, four temperatures, and two initial moisture conditions. The eight-ply composite panels were assumed to be manufactured from a graphite/epoxy, As/3501-5. To evaluate the influence of moisture and temperature, the transverse modulus, E2, and shear modulus, G12, were degraded based on experimental test data for the AS/3501-5 system. Each ply orientation, for a 12 in. panel radius, was evaluated at 20 time/temperature conditions that ranged from 80 to 300 F, and moisture concentrations ranging from a zero moisture content to an equilibrium moisture distribution. The investigation of curvature was conducted only for the (45/-452)s laminate and at a limited number of time/temperature conditions. The bifurcation loads were determined using the STAGS-C1 finite elements shell analysis program. This reduction in the bifurcation load is significantly influenced by the change in curvature at elevated temperatures and moisture content.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vibration and Buckling Characteristics of Composite Cylindrical Panels Incorporating the Effects of a Higher Order Shear Theory written by Peter E. Linnemann (CAPT, USAF.) and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vibration and Buckling Characteristics of Composite Cylindrical Panels Incorporating the Effects of a Higher Order Shear Theory written by Peter E. Linnemann and published by . This book was released on 1988 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical study is conducted to determine the fundamental frequencies and critical buckling loads for laminated anisotropic circular cylindrical shell panels, including the effects of transverse shear deformation and rotary inertia, by using the Galerkin Technique. A linearized form of Sander's shell strain-displacement relations are derived, which include a parabolic distribution of transverse shear strains. The theory is valid for laminate thickness to radius ratios, h/R, of 1/5. Higher order constitutive relations are derived for the laminate. A set of five coupled partial differential equations of motion and boundary conditions are derived and then solved using the Galerkin Technique. Simply supported and clamped boundary conditions are investigated. It is found that the Galerkin Technique converges for all panel configurations investigated; additionally, it is found that buckling problems need more terms in the approximation than vibration problems to obtain proper convergence. Theory compares exactly with the Donnel solutions, which are valid up to h/R = 1/50. As expected, as length to thickness ratios are reduced shear deformation effects significantly lower the natural frequencies and buckling loads. Analysis also shows that rotary inertia effects are very small. Finally, as h/R is varied from 0 (flat plate) to 1/5 (maximum limit), the frequencies and buckling loads increase due to membrane and bending coupling. Theses. (JHD).

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 Government reports annual index written by and published by . This book was released on 199? with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Non axisymmetric Local Stability Loss of a Hollow Cylinder written by Surkay D. Akbarov and published by Springer Nature. This book was released on 2023-12-03 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents formulations and examples of three-dimensional non-axisymmetric stability in viscoelastic anisotropic cylindrical shells. The most critical stability loss modes are determined by minimizing the critical loads and critical times with respect to the number of half-waves in radial as well as transverse directions. Currently, there is no literature available on three-dimensional local buckling analysis (or localized warpage) that considers non-axisymmetric stability loss in viscoelastic cylindrical shells. The contents of this book provide the formulation for such a stability loss analysis through the framework of the three-dimensional linearized theory of stability. Additionally, as this book addresses the problem by modeling the material as a viscoelastic fibrous composite, it can be applied to carry out buckling analysis in both elastic and viscoelastic cases. Guide to modelling composite viscoelastic shell elements for buckling analysis Provides a framework for defining the failure criterion for viscoelastic materials Course material for teaching shell buckling and viscoelastic composites

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1996 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Civil Engineering and Energy Environment Vol 1 written by Qingfei Gao and published by CRC Press. This book was released on 2023-06-20 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: Civil Engineering and Energy-Environment focuses on the research of civil engineering, environment resources and energy materials. This proceedings gathers the most cutting-edge research and achievements, aiming to provide scholars and engineers with preferable research direction and engineering solution as reference. Subjects in this proceedings include: - Engineering Structure - Environmental Protection Materials - Architectural Environment ·Environment Resources - Energy Storage - Building Electrical Engineering The works of this proceedings will promote development of civil engineering and environment engineering. Thereby, promote scientific information interchange between scholars from top universities, research centers and high-tech enterprises working all around the world.

Download or read book A Collection of Technical Papers written by and published by . This book was released on 1986 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Engineered Materials Abstracts written by and published by . This book was released on 1994-07 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerospace America written by and published by . This book was released on 1986 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Buckling Analysis of Multiple Laminated Cylindrical Composite Shell Panel Under Hygrothermal Effects by F E M written by Kim Ngoc Le and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air University Abstracts of Research Reports written by and published by . This book was released on 1986 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Finding Guide to AIAA Meeting Papers written by American Institute of Aeronautics and Astronautics. Technical Information Service and published by . This book was released on 1981 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fibre Reinforced Polymers International Dissertation written by John Summerscales and published by CRC Press. This book was released on 1988 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1986 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt: