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Literatura académica sobre el tema "Thin-walled hollow sections in tapered beams"

Autor: Grafiati
Publicado: 10 de marzo de 2023

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Artículos de revistas sobre el tema "Thin-walled hollow sections in tapered beams"

1

Ahmed, Sohail y M. N. Ahmed. "Modal Analysis of Thin Walled Multi-Cell Multi-Tapered Composite Beams of Closed Cross Sections". Applied Mechanics and Materials 629 (octubre de 2014): 82–88. http://dx.doi.org/10.4028/www.scientific.net/amm.629.82.

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This paper explicitly highlights the modal analysis of thin walled multi-cell multi-tapered composite beams in cantilever configurations, using MSC Patran / Nastran finite element package. Initially, the verification of the model was done with the analytical results in order to ensure the model accuracy. All the multi-tapered beams under examination are composed of closed section and three cell configuration. There is a vivid description of all the effects of composite material and stacking sequence on the modal frequencies. It also suggests the ways to shift the natural frequencies of the multi-tapered beams. This paper verifies the effects of different geometrical configurations of beams (tapered angles, lengths and point of variation of tapered angles) on the modal frequencies. This research is also useful in aerospace industry while designing the aircraft wing, which would experience the vibrations due to wind gust and engine cycles.
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2

Asgarian, B., M. Soltani y F. Mohri. "Lateral-torsional buckling of tapered thin-walled beams with arbitrary cross-sections". Thin-Walled Structures 62 (enero de 2013): 96–108. http://dx.doi.org/10.1016/j.tws.2012.06.007.

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Bertolini, P., M. A. Eder, L. Taglialegne y P. S. Valvo. "Stresses in constant tapered beams with thin-walled rectangular and circular cross sections". Thin-Walled Structures 137 (abril de 2019): 527–40. http://dx.doi.org/10.1016/j.tws.2019.01.008.

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4

M., Zahid, Ali Sarosh, Abid A. Khan y A. M. Khan. "Modal Analysis of Thin Walled Multi-cell Composite Doubly Tapered Beams of Closed Cross Sections". Frontiers in Aerospace Engineering 2, n.º 4 (2013): 235. http://dx.doi.org/10.14355/fae.2013.0204.03.

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5

Mohri, Foudil, Sid Ahmed Meftah y Noureddine Damil. "A large torsion beam finite element model for tapered thin-walled open cross sections beams". Engineering Structures 99 (septiembre de 2015): 132–48. http://dx.doi.org/10.1016/j.engstruct.2015.04.039.

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Mascolo, Ida, Mariano Modano, Antimo Fiorillo, Marcello Fulgione, Vittorio Pasquino y Fernando Fraternali. "Experimental and Numerical Study on the Lateral-Torsional Buckling of Steel C-Beams with Variable Cross-Section". Metals 8, n.º 11 (13 de noviembre de 2018): 941. http://dx.doi.org/10.3390/met8110941.

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Metallic thin-walled beams with continuously varying cross-sections loaded in compression are particularly sensitive to instability problems due to lateral-torsional buckling. Such a phenomenon depends on several parameters, including the cross-sectional properties along the entire length, material properties, load distribution, support, and restraint conditions. Due to the difficulty of obtaining analytic solutions for the problem under consideration, the present study takes a numerical approach based on a variational formulation of the lateral-torsional buckling problem of tapered C-beams. Numerical simulations are compared with experimental results on the buckling of a physical model of at thin-walled beam with uniformly varying cross-section, with the aim of assessing the accuracy of the proposed approach. The good agreement between numerical and experimental results and the reduced computational effort highlight that the proposed variational approach is a powerful tool, provided that the geometry of the structure and the boundary conditions are accurately modeled.
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7

Soltani, Masoumeh, Behrouz Asgarian y Foudil Mohri. "Improved Finite Element Model for Lateral Stability Analysis of Axially Functionally Graded Nonprismatic I-beams". International Journal of Structural Stability and Dynamics 19, n.º 09 (28 de agosto de 2019): 1950108. http://dx.doi.org/10.1142/s0219455419501086.

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This paper investigates the lateral buckling of simply supported nonprismatic I-beams with axially varying materials by a novel finite element formulation. The material properties of the beam are assumed to vary continuously through the axis according to the volume fraction of the constituent materials based on an exponential or a power law. The torsion governing equilibrium equation of the simply supported beam with free warping is numerically solved by employing the power series approximation. To this end, all the mechanical properties and displacement components are expanded in terms of the power series to a known degree. Then the shape functions are obtained by representing the deformation shape of the axially functionally graded (AFG) web and/or flanges tapered thin-walled beam in a power series form. At the end, new [Formula: see text] elastic and buckling stiffness matrices are exactly determined from the weak form expression of the governing equation. Three comprehensive examples each of axially nonhomogeneous and homogeneous tapered beams with doubly symmetric I-sections are presented to evaluate the effects of different parameters such as axial variation of material properties, tapering ratio and load height parameters on the lateral buckling strength of the beam. The numerical outcomes of this paper can serve as a benchmark for future studies on lateral-torsional critical loads of AFG beams with varying I-sections.
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8

Sahloddin, Yaser, Ahmad Dalvand, Masoud Ahmadi, Hossein Hatami y Mohammad Houshmand Khaneghahi. "Performance evaluation of built-up composite beams fabricated using thin-walled hollow sections and self-compacting concrete". Construction and Building Materials 305 (octubre de 2021): 124645. http://dx.doi.org/10.1016/j.conbuildmat.2021.124645.

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9

Zhu, Zhencai, Lei Zhang, Dexi Zheng y Guohua Cao. "Free vibration of horizontally curved thin-walled beams with rectangular hollow sections considering two compatible displacement fields". Mechanics Based Design of Structures and Machines 44, n.º 4 (20 de agosto de 2015): 354–71. http://dx.doi.org/10.1080/15397734.2015.1075410.

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Steau, Edward, Poologanathan Keerthan y Mahen Mahendran. "Web crippling study of rivet fastened rectangular hollow flange channel beams with flanges fastened to supports". Advances in Structural Engineering 20, n.º 7 (20 de octubre de 2016): 1059–73. http://dx.doi.org/10.1177/1369433216670172.

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Thin-walled steel hollow flange channel beams are commonly used as joists and bearers in various flooring systems in buildings. A new rivet fastened rectangular hollow flange channel beam was proposed using an intermittently rivet fastening process as an alternative to welded beams. This flexible fastening process allows rectangular hollow flange channel beams to have greater section optimisation, by configuring web and flange widths and thicknesses. In the industrial applications of rectangular hollow flange channel beams as flooring, roofing or modular building systems, their flanges will be fastened to supports, which will provide increased capacities. However, no research has been conducted to investigate the web crippling capacities of rectangular hollow flange channel beams with flanges fastened to supports under two-flange load cases. Therefore, an experimental study was conducted to investigate the web crippling behaviour and capacities of rectangular hollow flange channel beams based on the new American Iron and Steel Institute S909 standard test method. The web crippling capacities were compared with the predictions from the design equations in Australia/New Zealand Standard 4600 and American Iron and Steel Institute S100 to determine their accuracy in predicting the web crippling capacities of rectangular hollow flange channel beams. Test results showed that these design equations are considerably conservative for the end two-flange load case while being unconservative for the interior two-flange load case. New equations are proposed to determine the web crippling capacities of rectangular hollow flange channel beams with flanges fastened to supports. Test results showed that web crippling capacities increased by 78% and 65% on average for the end two-flange and interior two-flange load cases when flanges were fastened to supports. This article presents the details of this web crippling experimental study of rectangular hollow flange channel beam sections and the results.
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Tesis sobre el tema "Thin-walled hollow sections in tapered beams"

1

Abraham, Jeevan George. "A deflection, buckling and stress investigation into telescopic cantilever beams". Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/7380.

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The telescoping cantilever beam structure is applied in many different engineering sectors to achieve weight/space optimisation for structural integrity. There has been limited theory and analysis in the public domain of the stresses and deflections involved when applying a load to such a structure. This thesis proposes (a) The Tip Reaction Model, which adapts classical mechanics to predict deflection of a two and a three section steel telescoping cantilever beam; (b) An equation to determine the Critical buckling loads for a given configuration of the two section steel telescoping cantilever beam assembly derived from first principles, in particular the energy methods; and finally (c) the derivation of a design optimization methodology, to tackle localised buckling induced by shear, torsion and a combination of both, in the individual, constituent, hollow rectangular beam sections of the telescopic assembly. Bending stress and shear stress is numerically calculated for the same structure whilst subjected to inline and offset loading. An FEA model of the structure is solved to verify the previous deflection, stress and buckling predictions made numerically. Finally an experimental setup is conducted where deflections and stresses are measured whilst a two section assembly is subjected to various loading and boundary conditions. The results between the predicted theory, FEA and experimental setup are compared and discussed. The overall conclusion is that there is good correlation between the three sets of data.
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2

Taglialegne, Luca. "ANALYTICAL STUDY OF STRESS FIELDS IN WIND TURBINE BLADES". Doctoral thesis, 2018. http://hdl.handle.net/2158/1152810.

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The thesis aims at shedding light on the difference in the stress distribution between prismatic and non-prismatic beams. The approach strategy has being that of drastically simplifying the initial problem in the attempt to identify the relevant governing parameters. The geometry of a real wind turbine blade has been first drastically simplified: from the multi-cellular airfoil to a box girder and to a single web panel. Once solved the simplest problems, the intention has been to gradually reintegrate the complexity of the problem with the aim of applying the obtained results to a real wind turbine blade. The thesis consists of three parts. In the first part some brief information on the technology of wind energy and wind turbines are given. Also, the state of the art of the modeling of non-prismatic beams is discussed, with a particular focus on tapered beams. After some first remarkable results obtained at the beginning of the 20th century, the literature survey shows that only in recent years it has been an increase of interest on the subject. In the second part all the theoretical details that lead to the approach that is subject of the present thesis are deepened. In the third part the results of the application of the strategy proposed to both elementary and more complex geometries are shown, and the final remarks on the 10MW wind turbine blade are discussed.
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