Tesis sobre el tema "Buckling analysi"
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FALLAHI, NASIM. "Analysis and Optimization of Variable Angle Tow Composites Through Unified Formulation". Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2875739.
Texto completoPurbolaksono, Judha. "Buckling and post-buckling analysis of cracked plates by the boundary element method". Thesis, Queen Mary, University of London, 2003. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1831.
Texto completoArpaci, Erdogan. "Analysis Of Sinusoidal And Helical Buckling Of Drill String In Horizontal Wells Using Finite Element Method". Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611003/index.pdf.
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results and the experimental study in the literature.
Hashemian, Rouzbeh. "Buckling Analysis of Sandwich Pipes Under External Pressure". Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31781.
Texto completoMahar, Akshay Mangal. "Buckling and post-buckling behaviour of cold-formed steel built-up columns". Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/232829/1/Akshay%20Mangal_Mahar_Thesis.pdf.
Texto completoEl-Adas, Kadmous Moufid. "Linear and nonlinear buckling analysis via ABAQUS". Master's thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-01262010-020017/.
Texto completoWang, Yunxiao. "One-way buckling analysis of pipeline liners". Thesis, University College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404888.
Texto completoChryssanthopoulos, Marios Konstantinou. "Probabilistic buckling analysis of stringer-stiffened cylinders". Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47382.
Texto completoSchleyer, Graham Klaus. "Buckling of tank roofs : a buckling analysis and experimental investigation of storage tank domed roofs". Thesis, University of Strathclyde, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362804.
Texto completoPrinz, Gary S. "Using Buckling-Restrained Braces in Eccentric Configurations". BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2134.
Texto completoMurphy, A. "Accurate and efficient buckling and post buckling analysis of fuselage panels loaded in shear and compression". Thesis, Queen's University Belfast, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273230.
Texto completoZaghian, Sepideh. "Buckling Analysis of Steel Plates Reinforced with GFRP". Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32788.
Texto completoNguyen, Thanh Truong. "Numerical modeling and buckling analysis of inflatable structures". Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10123.
Texto completoThe main goals of this thesis are to modeling and to perform the buckling study of inflatable beams made from homogeneous orthotropic woven fabric (HOWF) composite. Three main scenarios were investigated in this thesis. The first is the experimental studies which were performed on HOWF inflatable beam in various inflation pressures for characterizing the orthotropic mechanical properties and buckling behaviors of the beam. In the second scenario, an analytical approach was considered to study the buckling and the behavior of an inflatable orthotropic beam. A 3D inflatable orthotropic beam model based on the Timoshenko's kinematics was briefly introduced: the nonlinearities (finite rotation, follower forces) were included in this model. The results were compared with theoretical results available in the literature. To check the limit of validity of the results, the wrinkling load was also presented in every case. The last scenario is devoted to the linear eigen and non-linear buckling analysis of inflatable beam made of HOWF. The finite element (FE) model established here involves a three-noded Timoshenko beam element with C0-type continuity for the transverse displacement and quadratic shape functions for the bending rotation and the axial displacement. In the linear buckling analysis, a mesh convergence test on the beam critical load was carried out by solving the linearized eigenvalue problem. In addition, a nonlinear FE model was developed by using the quasi-Newton iteration with adaptive load stepping for tracing load-deflection response of the beam. The results were validated from a certain pressure level by experimental and thin-shell FE results
Ho, Teck Tuak. "Analysis of distortional buckling in continuous composite beams". Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275729.
Texto completoBUFFONI, SALETE SOUZA DE OLIVEIRA. "BUCKLING ANALYSIS OF LONGITUDINAL REINFORCEMENT IN CONCRETE COLUMNS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5517@1.
Texto completoA flambagem das armaduras longitudinais em pilares de concreto armado pode ocorrer na região entre dois estribos consecutivos, ou pode envolver um certo número de estribos. As normas de projeto existentes não fornecem uma metodologia apropriada para o dimensionamento dos estribos em diferentes situações. O presente trabalho tem por objetivo desenvolver uma formulação que permita analisar a flambagem das armaduras longitudinais em pilares de concreto armado submetidos a carregamento axial levando em conta o espaçamento entre os estribos, o diâmetro e arranjo dos estribos na seção transversal e o diâmetro das armaduras longitudinais. Para este propósito um método analítico para a avaliação da flambagem da armadura longitudinal é proposto, considerando-se as barras longitudinais restringidas pela rigidez axial ou à flexão dos estribos. Admite-se que a armadura longitudinal funciona como uma coluna esbelta. Consideram-se duas formas de modelagem da atuação dos estribos: como apoios elásticos discretos e como base elástica contínua. O presente trabalho trata a coluna com um ou mais modos de deformação, incluindo certas não- linearidades. São fornecidos cargas críticas e caminhos pós-críticos para tais casos. Como resultado deste estudo, apresenta-se uma proposta para dimensionamento racional dos estribos que permite estudar diferentes alternativas em um ábaco de utilização simples para projeto. Apresentam-se comparações com resultados experimentais da literatura em pilares de concreto armado. Isto permite uma avaliação crítica dos desenvolvimentos teóricos realizados e da forma proposta de dimensionamento racional dos estribos.
Buckling of longitudinal reinforcement in reinforced concrete columns may occur in the region between two consecutive ties, or may involve a number of ties. The existing design code specifications do not provide an appropriate methodology for the design of the transversal reinforcement in different situations. The main objective of the present work is to develop a formulation to allow to analyze the buckling of longitudinal bars in reinforced concrete columns taking into account the tie spacing, the diameter and arrangement of the ties in the cross section and the longitudinal bar diameter. For this purpose an analytical method for the evaluation of the buckling load of longitudinal bars is described, as a function of the constraint imposed by the axial or flexural stiffness of the stirrups. The longitudinal bar is considered as a column deforming according to thin beam theory. The tie action is described either by a set discrete elastic supports or by a continuous elastic foundation. The theoretical analysis considers the column with one or more deformation modes, with some degree of nonlinearity, including the analysis of post-critical equilibrium paths. As a result of this study, rational criteria for spacing and sizing of transversal reinforcement are derived, allowing to study different alternatives in an abacus of simple use for design. Several comparisons with the results obtained experimentally by other authors in reinforced concrete columns are presented, allowing for an evaluation of the validity of the theoretical developments and the rational design methodology proposed herein.
CAVALCANTI, LILIAN DE VASCONCELLOS. "BUCKLING AND VIBRATION ANALYSIS OF SHALLOW CONOIDAL SHELLS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2014. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24636@1.
Texto completoEstruturas de cascas delgadas descritas por superfícies regradas têm sido frequentemente utilizadas em engenharia civil, devido ao fato de que elas são uma das soluções estruturais mais econômicos para cobrir grandes vãos. Superfícies regradas são obtidas pelo movimento de uma ou mais linhas ao longo de uma ou mais curvas. Sendo assim, elas são fáceis de construir, o que justifica a sua escolha em muitos casos. Por razões estéticas e estruturais, estas estruturas são geralmente superfícies abatidas, o que leva, como no caso de arcos abatidos, a uma forte não linearidade geométrica. Entre as cascas descritas por superfícies regradas, as cascas conoidais são frequentemente favorecidas para coberturas de grandes áreas livres de colunas, pela facilidade de construção, elegância estética e pelo bom fornecimento de luz natural. Uma casca conoidal é um caso especial de cilindróide, pertencente às superfícies de Catalan, e é gerada por uma linha reta em movimento paralelo a um plano, conhecido como o plano diretor, com uma de suas extremidades em uma curva plana e a outra em uma linha reta. Por vezes, uma parte da superfície conoidal no extremo reto é suprimida dando origem a uma configuração truncada. O objetivo deste trabalho é analisar, utilizando uma formulação de elementos finitos, as características de flambagem e vibração desta forma estrutural. Uma análise paramétrica detalhada é realizada para compreender a influência das condições de contorno e dimensões físicas da casca no seu comportamento estático e dinâmico. São apresentadas conclusões específicas no final do trabalho, para resumir os resultados do presente estudo, que pretende servir como importante subsídio para os engenheiros envolvidos na construção de estruturas similares.
Slender shell structures described by ruled surfaces have been frequently used in civil engineering due to the fact that they are one of the most economical structural solutions to cover large spans. Ruled surfaces are obtained by the movement of one or more lines along one or more curves. So they are easy to cast, which justifies their choice in many cases. For aesthetic and structural reasons these structures are usually shallow surfaces, which leads, as in the case of shallow arches, to a strong geometric nonlinearity. Among the shells described by ruled surfaces, conoidal shells are frequently favored as roofing units to cover large column-free areas due to the ease of fabrication, aesthetic elegance and good provision of natural light. A conoidal shell is a special case of cylindroids belonging to Catalan’s surfaces and is generated by a variable straight line moving parallel to a plane, known as the director plane, with one of its ends on a plane curve and the other on a straight line. Sometimes a part of the conoidal surface at the straight end is cut off giving a truncated configuration. The objective of this work is to analyze, using a finite element formulation, the buckling and vibration characteristics of this structural form. A detailed parametric analysis is conducted to understand the influence of boundary conditions, different spans, widths, and other physical dimensions on the static and dynamic characteristics of the structure. Specific conclusions are drawn at the end, to summarize the contributions of the present investigation, which are expected to serve as important design aids to engineers engaged in shell construction.
Chan, Cameron D. "MECHANICAL OPTIMIZATION AND BUCKLING ANALYSIS OF BIO-COMPOSITES". DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/877.
Texto completoSmith, Frank Harrison. "Elastic buckling solutions for thin-walled metal columns with perforation patterns". Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23680.
Texto completoMaster of Science
Mansour-Tehrani, F. "Studies in the mixed-mode analysis of partially prismatic thin-walled structures". Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235229.
Texto completoPoy, Denise Lori-Eng 1978. "On the buckling finite element analysis of beam structures". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/89884.
Texto completoJacob, K. I. "Three-dimensional vibration and buckling analysis of twisted parallelepipeds /". The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487263399024196.
Texto completoMehta, Paras. "Asymptotic post-buckling analysis by Koiter's method with a general purpose finite element code". Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-06082009-170924/.
Texto completoPinna, Rodney. "Buckling of suction caissons during installation". University of Western Australia. School of Civil Engineering, 2003. http://theses.library.uwa.edu.au/adt-WU2004.0008.
Texto completoJohnson, Barbara Helen. "Near-coincident doubly-symmetric branching systems : elastic post-buckling behaviour and imperfection sensitivity". Thesis, University of Surrey, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253986.
Texto completoPezeshky, Payam. "Distortional Static and Buckling Analysis of Wide Flange Steel Beams". Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36074.
Texto completoDamghani, Mahdi. "Buckling behaviour of delaminated composite plates using exact stiffness analysis". Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54887/.
Texto completoSherzad, Rafiullah y Awrangzib Imamzada. "Buckling and Geometric Nonlinear Stress Analysis : Circular glulam arched structures". Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-54569.
Texto completoSingh, Raghvendra. "Buckling analysis of delaminated composite plates with arbitrary edge conditions /". The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu14876756871766.
Texto completoMa, Ming. "Elastic and inelastic analysis of panel collapse by stiffener buckling". Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-170150/.
Texto completoPatil, Abhishek J. "Buckling analysis of a bendable composite unmanned air vehicle wing". [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0025037.
Texto completoChen, Gengbo. "Probability-Based Buckling Design of Single-Layer Reticulated Domes". Thesis, The University of Sydney, 2017. https://hdl.handle.net/2123/27507.
Texto completoBeji, Faycel Ben Hedi. "Buckling Analysis of Composite Stiffened Panels and Shells in Aerospace Structure". Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/81620.
Texto completoMaster of Science
ASCIONE, ALESSIA. "Synthetic models for the analysis and control of composite and sandwich aerospace structures in critical conditions". Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2751494.
Texto completoGrall, Bruno. "Structural analysis of geodesically stiffened composite panels with variable stiffener distribution". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-12232009-020522/.
Texto completoPATTNAIK, SHRIKANT PRASAD. "PREDICTION OF BENDING WAVES IN THIN PLATES FORMED BY BUCKLING DURING ROLLING PROCESS". University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1148319302.
Texto completoAvecillas, Javier Andres. "Topology Optimization of Steel Shear Fuses to Resist Buckling". Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/87407.
Texto completoMaster of Science
Shear-acting structural fuses are steel plates with cutouts that dissipate energy during extreme loading events such as earthquakes. These structural fuses have a fixed edge and an opposing edge subjected to in-plane lateral displacements. Although previous studies have reported that fuses with specific geometry have a good cyclic performance, their small thickness makes them prone to bend or buckle, reducing strength and energy dissipation capacity. Considering a structural fuse with a square domain and constant thickness, a mathematical method called topology optimization is implemented to optimize the distribution of material with the goal of controlling the amount of yielding in the structural fuse before it buckles. The optimization routine uses the fuse’s shear buckling capacity (VB) and shear yield strength (VY ) obtained from relative simple and computationally inexpensive procedures that are also valid to characterize the potential for buckling in a structural fuse. The variations VY /VB = 0.1, 0.2, 0.3 are investigated considering a target volume equal to 30%, 40% and 50% the fuse’s original volume. A set of optimized topologies are interpreted into smooth shapes and evaluated using finite elements analyses. It was found that the drift angle when out-of-plane buckling occurs can be controlled by using the VY /VB ratio, with optimized topologies buckling at drift angles (when subjected to a cyclic displacement protocol) as large as 9% as compared to 6% for previously studied fuses. .
Yuan, Zeng. "Advanced Analysis of Steel Frame Structures Subjected to Lateral Torsional Buckling Effects". Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/15980/1/Zeng_Yuan_Thesis.pdf.
Texto completoYuan, Zeng. "Advanced Analysis of Steel Frame Structures Subjected to Lateral Torsional Buckling Effects". Queensland University of Technology, 2004. http://eprints.qut.edu.au/15980/.
Texto completoYuan, Qizhong. "Finite element analysis of the plastic buckling of a cantilever beam". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/MQ42464.pdf.
Texto completoConrad, Katarina Terzic. "Analysis of the Buckling States of an Infinite Plate Conducting Current". Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/29041.
Texto completoPh. D.
Vallejos, Augusto, Shammely Ayala y Roman Arciniega. "Improved First Order Formulation for Buckling Analysis of Functionally Graded Beams". Institute of Electrical and Electronics Engineers Inc, 2020. http://hdl.handle.net/10757/656419.
Texto completoIn this research, an improved first order formulation is presented to study the critical buckling load in functionally graded beams. The formulation has five independent variables in comparison with the Timoshenko theory that has three. The Trefftz criterion is utilized with incremental and fundamental states to define the stability analysis. Virtual work statements are derived for the finite element model where the field variables are interpolated by Lagrange polynomials. The numerical results are compared and verified with other formulations found in literature. Parametric studies are also carried out for buckling behavior due to different slenderness ratios, power-law indices and boundary conditions. Applications of the model to functionally graded materials show the validity of the present approach.
Uzman, Burak Jr. "Thermal Analysis and Response of Grid-Stiffened Composite Panels". Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/31381.
Texto completoMaster of Science
Sonawane, Mahesh. "Buckling analysis of singly curved shallow bi-layered arch under concentrated loading". [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1576.
Texto completoQin, Yi. "Numerical analysis of inelastic local web buckling capacity of coped steel I-beam". Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2586272.
Texto completoHirst, Paul B. "Buckling behaviour of slender structural elements under interactive axial static and cyclic loading". Thesis, Sheffield Hallam University, 1987. http://shura.shu.ac.uk/19797/.
Texto completoMaria, Joseph Amal Jerald Joseph. "Directional Actuation Induced by Interactive Buckling in Slender Structures with Imperfections". The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555525058577127.
Texto completoCHEN, WEN-JI y 陳文吉. "Analysis of laminated composite plates and shell panels:vibration, buckling, and thermal buckling". Thesis, 1992. http://ndltd.ncl.edu.tw/handle/43436673787665819682.
Texto completoHuang, Chun-Sung y 黃竣淞. "The Buckling Analysis of Countersink Driller". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/357su7.
Texto completo國立高雄應用科技大學
模具系碩士在職專班
103
Countersink drillers can be used to machine countersink holes of various diameters. To drill a step hole, a small diameter drill is first used to make a small diameter hole, and then a large diameter drill is used for drilling a large diameter hole. This machining method is widely applied in the industry, and its main purpose is to allow the countersink hole to be used for fastener purpose. It is an improvement over the conventional drilling method of a countersink hole that requires two drilling processes. However, improper drilling data, hard-to-cut material as well as external environment factors may often cause the drilling process stop inappropriately. If the drilling spindle continues going downward, it can cause the driller to twist and break, which will damage the drilling tool and severely affect the machining process. This study conducts a static buckling analysis of countersink drills, and explores the changes in static buckling strength of small and large drills with different diameter to length ratios. This study first employs Euler’s critical buckling formula to calculate the theoretical critical buckling values. After conducting a numerical analysis by using ANSYS, the data is validated to be reliable within a margin error within 2%. Analysis is carried out for both 180 degree and 90 degree countersink drillers, and a L9(34) orthogonal arrays of the Taguchi Method is used with 4 factors: the small diameter, the large diameter, the length of the small diameter tip and the length of large one. Each factor has 3 levels in association with the industry standard. Analysis results show that the critical buckling value is higher when the drill and tip have a larger diameter and shorter length. This is consistent with Euler’s theory. However, if the ratio between the diameter of the tip and drill exceeds the ratio between the diameter and length of the tip, the critical buckling strength will decrease. The influence of each of the 4 factors, which slightly differs by countersink drill and boundary conditions, is: tip’s diameter 52%, tip’s length 26%, drill’s diameter 14%, and drill’s length 8%. It is apparent that the tip’s diameter has the greatest influence on the static buckling strength. When the tip’s diameter is too small, it can easily twist and break. Observing the critical buckling average, the 180-degree countersink drill has a slightly higher critical buckling value than the 90-degree countersink drill. Furthermore, when compared with a typical M4 one-diameter drill, the buckling strength of a M4 countersink drill is 4 times stronger.
Ruei-SianWang y 王芮嫻. "Buckling Analysis of Composite Wing Structures". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/20086154968235221609.
Texto completo國立成功大學
航空太空工程學系碩博士班
98
Several different structural models have been proposed to study composite wing structures such as isotropic beam model,laminated beam model, box model and plate model. By following the study of Moh and Hwu (1997) on composite sandwich plate, in this thesis we use the Rayleigh-Ritz method to attain the buckling load of composite sandwich plates.With the consideration of the airfoil shape, the results were further extended to composite wing structures. Finally a computer program was coded with MATLAB to conduct the buckling analysis,and the results were compared with those obtained by the finite element software ANSYS.
Li, Ming-Shing y 李明興. "Buckling Analysis of Plates Using SCM". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/09498665396665969457.
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