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Showing 1 to 20 of 48 for “"buckling analysis"”.
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Buckling Analysis of Composite Stiffened Panels and Shells in Aerospace Structure
… shells may significantly increase the overall buckling load of the resultant stiffened structure. Initially, an extensive literature review was conducted over the past ten years of published work wherein research was conducted on grid stiffened composite structures and stiffened panels, due to …
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Buckling Analysis and Optimum Proportions of Sandwich Cylindrical Shells Under Hydrostatic Pressure
Made available in DSpace on 2015-05-12T17:06:24Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6003918.PDF: 5691892 bytes, checksum: 9455d3ecf9fe0057a8f281562ac51944 (MD5) Previous issue date: 1960
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Stress and buckling analysis of grain silos under snow or wind loads
… all of the simplifications mentioned above. This analysis proved that the conventional analysis overestimates the generalized stresses by 200 to 300 percent. As an alternative a simple improved model is proposed, which takes into account the presence of the shell skin, the ring and the …
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Vibration and Buckling Analysis of Unitized Structure Using Meshfree Method and Kriging Model
… approximation, is developed here for vibration, buckling and static analysis of homogenous and FGM plate with curvilinear stiffeners. Numerical results for different stiffeners configurations and boundary conditions are presented. All results are verified using the commercial finite element …
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Asymptotic post-buckling analysis by Koiter's method with a general purpose finite element code
… sometimes leading to a great decrease in buckling load. Koiter showed that the effect of initial imperfections is largely determined by the initial post-buckling behavior of the perfect structure. The present work seeks to implement Koiter’s method of asymptotic post-buckling analysis on a …
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Thermal Bending, Buckling and Post-Buckling Analysis of Unsymmetrically Laminated Composite Beams with the Effects of Moisture and Geometric Imperfections
… the analytical study of the thermal bending, buckling, and post-buckling of unsymmetrically laminated composite beams with imperfection under hygrothermal effects. Three different boundary conditions will be considered on this study. The non-linear governing partial differential equations are …
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The buckling and post-buckling behaviour of simply supported rectangular plates with centrally located circular holes
This thesis describes an investigation into the buckling, post-buckling behaviour and collapse of simply supported square and rectangular plates with centrally located circular holes. The review of the current literature is preceded by a brief description of the approximate methods of plate …
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Analysis of the Behavior of Steel Silos Under Wind Loading (Buckling, Stiffeners, Corrugated Shell, Anchor Bolts)
This study deals with the linear elastic analysis and the linearized buckling analysis of steel silos under wind loading. In the first part, the wind loading pattern is established and the equivalent orthotropic rigidities of standard corrugated sheets are reviewed and, in some cases, new improved …
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Stability of elastic grid shells
… are determined from existing projects. The buckling analysis as well as the form-finding of the different structures are performed using finite element analysis. The tools are validated with comparison of the shape and buckling capacity of a pre-buckled arch with existing experiments. The …
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Localization instability and the origin of regularly-spaced faults in planetary lithospheres
… I construct such a model by modifying the buckling analysis of a mechanically-stratified lithosphere idealization, by allowing for rheologies that have a tendency to localize. The stability of a heological system against localization is indicated by its effective stress exponent, ne. That …
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Thermal Analysis and Response of Grid-Stiffened Composite Panels
… the thermal deformation response and thermal buckling loads of rectangular grid-stiffened composite panels is presented. Two edge conditions are considered for the panel, one in which all panel edges are free to deform, and another when all the edges are restrained. In the first case panel …
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Finite-element modeling of a composite bridge deck
… results and the experimental results. A failure analysis, based on maximum stress, maximum strain and Tsai-Wu theories of the Prodeck 8 is carried and first ply failure is determined. Finally, the Prodeck 8 is evaluated for critical load by performing a buckling analysis.
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Wrinkling of Membrane and Thin Film under Torsion
… with those from the commercial finite element analysis software ABAQUS.</p> <p> In the eigenvalue and eigenmode buckling analysis with finite element method, the number of wrinkles is relatively sensitive to the pre tensile stretching, the mesh size and the element types, especially for the …
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Thermal Post-Buckling and Vibration Analysis of Thermally Buckled Antisymmetrically Laminated Beams Using a 20 DOF Finite Element
… use the finite element method to analyze thermal buckling, post-buckling, and vibrations of thermally buckled composite beams including shear deformation. The beam element used has ten degrees of freedom at each node: axial displacement, transverse displacement due to bending and shear, twisting …
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Minimum-weight design of compressively loaded stiffened panels for postbuckling response
… compression based on a geometrically nonlinear analysis. An approximate, semi-analytical nonlinear analysis code, NLPAN, which requires buckling eigenfunction information from the buckling analysis code, VIPASA, is linked with the optimization code ADS. A blade-stiffened and T-stiffened panel …
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Free vibration and stability of complete orthotropic circular toroidal shells
… in the areas of vibration and stability analysis of complete orthotropic circular toroidal shells. It is conducted in four main parts. A literature survey is first carried out indicating the new and continuing uses of toroidal shells in engineering structures. Secondly, theory is …
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Combined structural and manufacturing optimization of stiffened composite panels
… composite panel. For the manufacturing analysis, a one-dimensional resin film infusion model is developed to compute the infiltration time of the resin into a fabric preform of the panel. Results are presented showing the effects of structurally important design variables, such as …
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Finite Element Analysis of Thermal Buckling in Automotive Clutch and Brake Discs
<p>Thermal buckling behavior of automotive clutch and brake discs is studied by making the use of finite element method. It is found that the temperature distribution along the radius and the thickness affects the critical buckling load considerably. The results indicate that a monotonic …
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Nonlinear Stability Analysis of Frame-Type Structures with Random Geometric Imperfections Using a Total-Lagrangian Finite Element Formulation
… using the mo de shapes from a linear buckling analysis, and a specified maximum allowable magnitude for the imperfection at any imperfect node in the structure. The third part deals with the calculation of the probability of failure using a combined response surface/ first-order …
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