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Showing 1 to 20 of 61 for “"post-buckling"”.
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Post-Buckling Behavior of Thin Annular Plates Under Torsional Loading
Made available in DSpace on 2014-12-10T17:25:47Z (GMT). No. of bitstreams: 1 6910815.pdf: 1701242 bytes, checksum: bdd6e1dd5ea0253c898c15f4280a3cee (MD5) Previous issue date: 1968
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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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Interactive Buckling and Post-Buckling Studies of Thin-Walled Structural Members with Generalized Beam Theory
… members experience some extent of interactive buckling that corrodes the load carrying capacity. Current design methods predict the strength of thin-walled metallic structural members based on individual buckling limit-states and limited case of interactive buckling limit state. In order to …
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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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EFFICIENT SOLUTION METHODS FOR NONLINEAR FINITE ELEMENT ANALYSIS (DESIGN, GEOMETRIC MATERIAL, POST-BUCKLING, STRUCTURAL, MECHANICS, NUMERICAL).
Solution algorithms are developed for the nonlinear finite element equations, resulting from the discretization of governing incremental equations of equilibrium. The equations of equilibrium in the total Lagrangian formation are derived, based on continuum mechanics principles and by invoking the …
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3D MEMS via (post-) buckling of micromachined structures and integration of bulk nanoporous elements in microfluidic devices
… where structures are designed to operate in the post-buckling regime, thus exploiting buckling phenomena to achieve functional elements that extend out of the wafer plane. An analytical approach to 3D MEMS design and characterization is presented, based on non-linear (post-)buckling of layered …
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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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Nonlinear numerical analysis of thermal buckling and post-buckling of rectangular FG plates with temperature-dependent properties using CUF
L'abstract è presente nell'allegato / the abstract is in the attachment
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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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Ruga mechanics of composite media with soft inclusions
… in the fibril matrix substantially alters the post-bifurcation response of elastic fibrils. First, nonlinear finite element analysis is used to demonstrate that due to localized instabilities, fibrils with soft inclusions exhibit negative post-buckling stiffness. The local instability is …
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Buckling and postbuckling of flat and curved laminated composite panels under thermomechanical loadings incorporating non-classical effects
… models which can be used to predict the buckling, post buckling and vibration behavior of flat and curved composite panels under thermomechanical loadings are developed in this work. Both models are based on higher-order transverse shear deformation theories of shallow shells that include …
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Instabilidade e sensibilidade de cascas cilíndricas circunferencialmente enrijecidas
An analysis of the buckling load and the imperfection-sensitivity of ring stiffened cylinders under external pressure is presented. Koiter's general post-buckling theory provides the basis to estimate the imperfection-sensitivity by relating it to the initial post-buckling behavior of the perfect …
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The structural behavior of cold-formed steel members with perforated elements
… of cold-formed steel members depends on the buckling behavior of individual component elements, emphasis has been concentrated on the study of the instability and post-buckling strength of perforated elements. In this investigation, the buckling loads and post-buckling strength of stiffened …
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Thermomechanical Response of Shape Memory Alloy Hybrid Composites
… responses are demonstrated including thermal buckling, thermal post-buckling, vibration, sonic fatigue, and acoustic transmission. A thermomechanical model is presented for analyzing such shape memory alloy hybrid composite (SMAHC) structures exposed to thermal and mechanical loads. Also …
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Mechanical behavior of elastic rods under constraint
… curved rod suspended under self-weight, ii) the buckling and post-buckling behavior of a rod compressed inside a cylindrical constraint, iii) the mechanical instabilities arising when a rod is progressively injected into a horizontal cylinder, and iv) strategies for mitigation of these …
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Modeling and Simulation of Morphological Instabilities in Thin Elastic Solids
… instabilities in thin solids, such as buckling of thin shells and wrinkling of thin sheets, is of growing interest to a number of academic disciplines including en-gineering, physics, biology, and many others. For example, buckling has traditionally been re-garded as an unfavorable …
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Cyclic lateral-torsional buckling of short I-beams
This report concerns the inelastic lateral buckling and post-buckling behavior of short I-beams subjected to cyclically reversing loads. The eccentrically braced frame, used in the earthquake resistant design of building structures, provides an application in which lateral buckling of short I-beams …
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Thermal buckling and postbuckling of symmetrically laminated composite plates
… paper discusses an investigation into thermal buckling and post-buckling of symmetrically laminated composite plates. In this study, thermal buckling is investigated for laminates under two different simple support conditions, fixed and sliding. These laminates are subjected to the conditions …
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Influence of symmetry on the stability behaviour of plane and space frames
… to investigate how symmetry influences the buckling behaviour of open frames as well as closed polygonal and prismatic frames. This was achieved by employing analytical methods developed in this study and the finite element method to study plane and space frames. The analytical results were …
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