Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Buckling failure"”.
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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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Thermomechanical Modeling of Oxidation Effects in Porous Ultra-High Temperature Ceramics
… RVEs showed shear banding and subsequent shear failure of the inter-pore struts, while shear banding in 70% RVE weakened the struts, which lead to buckling failure. A snapshot oxidation model was then applied to the hexagonal RVEs in place of a transient, diffusion-based oxidation solver. …
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Optimizing interventions for the treatment of vascular flow disruptions
… one normal deployment and the other with device buckling failure. The work highlights the ongoing need for better understanding of how calcium distribution in the aortic root environment affects a patient's susceptibility to clinical complications.
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Borehole Breakouts in Transversely Isotropic Posidonia Shale
… are point-symmetric and form compressive shear failure planes, which can be predicted by a Mohr-Coulomb failure approach. If the shear failure planes intersect, conjugate breakouts can be described as "dog-eared” breakouts. While the initiation of breakouts for wells oriented normal to the …
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Effects of Voids on Delamination Behavior Under Static and Fatigue Mode I and Mode II
… 30 year lifetime. Delamination or interlaminar failure is a serious failure mode observed in composite structures. Even partial delamination will lead to a loss of local stiffness, which can preclude buckling failure. Manufacturing process defects such as voids and fiber waviness degrade the …
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Mechanical behaviour of steel hollow section columns subjected to damage – experimental study and finite element modelling
… using both linear elastic and non-linear buckling analysis approaches. The results indicated a substantial reduction in the failure strength of the HSS members due to damage. However, the elastic buckling loads of the hollow sections were not significantly affected. This observation …
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Predicting the Failure of Aluminum Exposed to Simulated Fire and Mechanical Loading Using Finite Element Modeling
… programs can produce accurate predictions of failure of structural components. Parameter studies conducted within finite element programs are often easier to implement than corresponding studies conducted experimentally. In this work, the compression-controlled failures of aluminum plates …
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Bending and Shear Behavior of Pultruded Glass Fiber Reinforced Polymer Composite Beams With Closed and Open Sections
… of members in flexure and shear under different failure modes, where the current failure load prediction models proposed within have been shown to be highly inaccurate based on experimental data and evaluation performed by researchers at the West Virginia University Constructed Facilities …
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Finite Element Modeling of Plastic Pails when Interacting with Wooden Pallets
… the finite element model. Nonlinear eigen buckling analysis was used to model the plastic pail buckling failure that was seen in physical testing. The model based on the physical experiments was able to predict the behavior of the plastic pail within a range of 5-12% variation with higher …
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Wedge failure analysis of anchored rock slopes subjected to surcharge and seismic loads
… or other discontinuities, several types of slope failure, such as plane failure, wedge failure, toppling failure, buckling failure and circular failure, are often observed. The present work focuses on the study of the wedge failure, which occurs as sliding of a mass of rock on two intersecting …
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An investigation into the effects of the shifting centroid and shear centre in notched steel beams undergoing elastic lateral torsional buckling
… heights. The design for Lateral Torsional Buckling (LTB) in standard prismatic sections accounts for the monosymmetry through the monosymmetry factor which accounts for the additional twisting moment. However, this is not used in the analysis of notched regions for beams that are laterally …
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Reliability-based Design Optimization of a Nonlinear Elastic Plastic Thin-Walled T-Section Beam
… under combined loads and with flexural-torsional buckling and local buckling failure modes. First, a nonlinear elastic-plastic T-beam was modeled using a simple 6 degree-of-freedom non-linear beam element. To address the problems of RBDO, such as the high non-linearity and derivative discontinuity …
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Continuum Mechanics Modelling of Corrugated Board
… strength play important roles for the time to failure. Supplementary, the stochastic nature of material and moisture load is obstructing the prediction of a reliable measure of lifetime. This work is composed of a number of portion proposals, each aiming on a method for a specific subproblem of …
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Large deformation structural performance of double skin composite construction using British Steel's 'Bi-Steel'
… regions of deformation and includes local buckling of the compression plate. Analytical solutions are developed for all aspects dealt with by this thesis which are supported with an experimental test programme. The test programme uses 16 full-scale, wide beam specimens that are tested in …
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Energy Absorption of Metal-FRP Hybrid Square Tubes
… crack propagation may lead to unstable collapse failure mode and concomitant very low energy absorption. As a result, metal-composite hollow tubes have been developed that combine the benefits of stable ductile collapse of the metal (which can absorb crushing energy in a controlled manner) and …
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The instability of slender reinforced concrete columns. A buckling study of very slender reinforced concrete columns between the slenderness ratios of 30 and 79 Including essential creep investigations, and leading to design recommendations.
… in knowledge of the real resistance to buckling of very slender reinforced concrete columns leads to an exaggeration of the sizes of the columns. _The examples of concrete compression members cited and constructed in Industry on a global basis suggest that very slender columns have …