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 20 of 112 for “"Beam Theory"”.
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On the foundations of beam theory.
On the foundations of beam theory.
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Curved Beam Theory Applied to Opening Design
Made available in DSpace on 2014-12-10T17:57:38Z (GMT). No. of bitstreams: 1 6408344.pdf: 5451738 bytes, checksum: ef2696f2d786cca6e7aaf75e5f174df6 (MD5) Previous issue date: 1964
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The generalised beam theory with finite difference applications
The conventional design of steel beams considers that any deformation of a member due to applied load must be a combination of the four rigid body modes (axial deformation, major axis bending, minor axis bending and twisting) i. e. the member retains its cross sectional shape without distortion. In …
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A Geometrically nonlinear curved beam theory and its finite element formulation
This thesis presents a geometrically exact curved beam theory, with the assumption that the cross-section remains rigid, and its finite element formulation/implementation. The theory provides a theoretical view and an exact and efficient means to handle a large range of nonlinear beam problems. A …
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Interactive Buckling and Post-Buckling Studies of Thin-Walled Structural Members with Generalized Beam Theory
… generally applicable methodology for Generalized Beam Theory (GBT) elastic buckling analysis on members with holes, where the buckling modes of gross cross-section interact with those of net cross-section. The approach treats member with holes as a structural system consisting of prismatic …
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Stability analysis of light gauge steel members using the finite element method and the generalized beam theory
… loads and boundary conditions. The Generalized Beam Theory (GBT) with the facilities of elastic spring restraints, buckling under coupled loads, different load locations has been developed and programmed by the author. It has been applied to reveal the basic behaviour and the interaction between …
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Verification and validation of the geometrically exact beam theory with Legendre spectral finite elements for wind turbine blade analysis, A
… model in FAST is based on linear Euler-Bernoulli beam theory. A new finite element beam model, BeamDyn, which is based on the geometrically exact beam theory (GEBT) has been proposed to replace the incumbent wind turbine blade model in FAST. In the work reported here, GEBT and its spectral finite …
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The use of generalized beam theory, finite elements and experimental testing to investigate the stability of light gauge steel sections subject to axial load
… method, finite strip method and generalized beam theory) are addressed. The literature review is concerned with computer software applications, theoretical analyses and experimental tests which can predict buckling loads and related mode shapes for light gauge steel sections. The study …
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A Study of Shock Analysis Using the Finite Element Method Verified with Euler-Bernoulli Beam Theory; Mechanical Effects Due to Pulse Width Variation of Shock Inputs; and Evaluation of Shock Response of a Mixed Flow Fan
… Element Method Verified With Euler-Bernoulli Beam Theory; Mechanical Effects Due To Pulse Width Variation Of Shock Inputs; And Evaluation Of Shock Response Of A Mixed Flow Fan</p> <p>David Jonathan González Campos</p> <p>For many engineers that use finite element analysis or FEA, it is very …
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Optimal design of composite fuselage frames for crashworthiness
… frames is developed using a Vlasov type beam theory. A curved thin-walled composite beam theory is developed and a finite element implementation of the beam theory is used for progressive failure analysis. The accuracy and limitations of this analysis method are discussed. A model for …
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Experimental investigation of inclined cantilever beams in vertically falling soap films
… investigate the dynamic response of cantilever beam at various angles of attack using theory and experiments. The problem is motivated by separate wind tunnel experiments using energy producing piezoelectric cantilevers. Assuming small vibrational amplitudes, we utilize the Euler-Bernoulli beam …
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Design of Sandwich Structures
Failure modes for sandwich beams of GFRP laminate skins and Nomex honeycomb core are investigated. Theoretical models using honeycomb mechanics and classical beam theory are described. A failure mode map for loading under 3-point bending, is constructed, showing the dependence of failure mode and …
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ΔΥΝΑΜΙΚΗ ΤΩΝ ΡΗΓΜΑΤΩΜΕΝΩΝ ΔΟΚΩΝ ΣΤΟ ΝΕΡΟ
… COMPUTED. THIS WAS ACCOMPLISHED WITH TIMOSHENKO BEAM THEORY, ANALYTICALLY AND WITH ONE DIMENSION FINITE ELEMENTS, BY INTRODUCING THE CRACK EFFECT WITH LOCAL COMPLIANCE COEFFICIENTS. ALSO WAS ACCOMPLISHED, BY THEORY OF ELASTICITY WITH PLAIN STRESS QUADRILATERAL FINITE ELEMENTS, BY INTRODUCING THE …
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Free Vibration of Bi-directional Functionally Graded Material Circular Beams using Shear Deformation Theory employing Logarithmic Function of Radius
Curved beams such as arches find ubiquitous applications in civil, mechanical and aerospace engineering, e.g., stiffened floors, fuselage, railway compartments, and wind turbine blades. The analysis of free vibrations of curved structures plays a critical role in their design to avoid transient …
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Dynamic analysis of magnetorheological elastomer configured sandwich structures
… change of MRE and MRE cored adaptive sandwich beam structures depending on magnetic fields. Dynamic shear property tests with different curing stages have been enhanced to obtain various properties. The new developed forced vibration test rig enabled forced vibration tests of MRE embedded …
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An Efficient Reduced Order Modeling Method for Analyzing Composite Beams Under Aeroelastic Loading
… An example of this might be a box-beam made up of 4 laminates, all of which are quasi-isotropic. This results in neglecting more complex designs that might yield a more effective solution, but require a greater analysis effort. The present work aims to show that the incorporation of …
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Thermal Bending, Buckling and Post-Buckling Analysis of Unsymmetrically Laminated Composite Beams with the Effects of Moisture and Geometric Imperfections
… 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 derived by taking into account the von-Karman geometrical …
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Análise linear de estruturas planas com elementos de paredes delgadas
… were analised. The first one - fixed-end beam - was compared with known results of this beam theory. ln the other two examples - grid and plane frame - the internal forces and the stresses were compared with results obtained with a method of analysis that considers members with plane …
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Closed/Semi-Closed Form Solutions for Face/Core Debonds in Sandwich Beams
Sandwich beams are highly susceptible to debonding at the interface between face and core. These debonds can grow and eventually lead to complete failure of the structure. To understand and study such debonds analytically, an Elastic Foundation Analysis (EFA) can be used to incorporate the effects …
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Structural Analysis of a Pultruded Composite Beam: Shear Stiffness Determination and Strength and Fatigue Life Predictions
… fiber-reinforced polymeric composite structural beam, a 91.4 cm (36 inch) deep pultruded double-web beam (DWB) designed for bridge construction. Part 1 focuses on calculating the Timoshenko shear stiffness of the DWB and understanding what factors may introduce error in the experimental …
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