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 30 for “"Shear Deformations"”.
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Effects of shear deformations on the vibrational frequencies of wide-flanged structures
… beam equations (which include transverse shear deformation and rotary inertia effects) are extended for a wide-flanged structure to include the additional shear lag deformation of the flanges; thus, cross-sections of the beam are allowed to distort instead of remaining plane sections. The …
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Random vibrations of composite beams and plates
… composite laminates are strongly affected by the shear deformations of their layers. However, incorporation of the shear deformation further complicates the equations of motion and their analysis. As a result the vibration analysis of such structures have been limited to simple free vibration …
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Flutter of sandwich panels at supersonic speeds
… thin plate theory. In such a theory, transverse shear deformations are neglected which is a reasonable assumption for solid plates. For a sandwich panel, neglect of transverse shear deformations may not be a good assumption in flutter analysis inasmuch as studies have indicated that the vibration …
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Background for finite element analysis and experimental testing of glued-laminated space beams
… is formulated on engineering theory and includes shear deformations. The engineering elastic constants needed to specify the constitutive matrix of the beam element are obtained experimentally. Strain measurements in wood with small bonded strain gages are not accurate. A simple clip-type …
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The Effects of Shear Deformation in Rectangular and Wide Flange Sections
Shear deformations are, generally, not considered in structural analysis of beams and frames. But shear deformations in members with low clear span-to-member depth ratio will be higher than normally expected, thus adversely affecting the stiffness of these members. Inclusion of shear deformation in …
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Um sistema computacional para a análise de estruturas de centrais nucleares, formadas por painéis, utilizando-se superelementos
… of freedom each, 8 nodal points, in which shear deformations are considered, and super-elements, whose internal degrees of freedom are condensated, are used. Arbitrary shells can be analized too. A brief exposition of the method is present and the developing of the foregoing element and …
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Dynamic analysis of a composite moving beam
… needs to be considered also. First Order Shear Deformation theory (FSDT) is used to formulate the problem since transverse shear deformations are important for composite beams. When reducing laminate plate theory to corresponding beams, plane strain and plane stress assumptions are …
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Performance of Reinforced Concrete Edge Beam -Column -Slab Connections Subjected to Earthquake Loading
… fact not rigid, but rather undergo significant shear deformations that contribute greatly to global drift. Therefore, the ""rigid joint"" assumption may result in misinterpretation of the global performance characteristics of frames and could consequently lead to miscalculation of strength and …
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On the predictive capability and stability of rubber material models
… models are studied jointly for non-homogenous deformations. The Mooney-Rivlin model, Arruda-Boyce model, Ogden model have difficulties in describing the uniaxial compression data while the Sussman-Bathe model can fit both compression and extension data well. Thus, the Sussman-Bathe model has …
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An incremental total Lagrangian formulation for general anisotropic shell-type structures
… conditions, lamination scheme, transverse shear deformations and geometric nonlinearity on static and transient responses are also investigated. Many of the numerical results of general shell-type structures presented here could serve as references for future investigations.
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Dynamic stability of shear deformable viscoelastic composite plates
… structures exhibit weak rigidity in transverse shear, the associated governing equations account for the transverse shear deformations, as well as the transverse normal stress effect. The integro-differential equations governing the stability are solved for simply-supported boundary conditions …
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Load transfer in the stiffener-to-skin joints of a pressurized fuselage
… linear response include the effect of transverse shear deformations and the effect of warping of the ring’s cross section due to torsion. These effects are important when the ring has an asymmetrical cross section because the loss of symmetry in the problem results in torsion and out-of-plane …
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Stress and buckling analysis of grain silos under snow or wind loads
… braces and the eccentricities and transverse shear deformations of all stiffeners. Next, to arrive at more accurate solution the same problem is solved by the finite element method. A finite element computer program, PHOENIX, developed by the writer is tailor-made to model stiffened shells of …
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Thermomechanical properties of novel lanthanum zirconate based thermal barrier coatings - an integrated experimental and modeling study
… element (FE) methods. The nanoscale tensile and shear deformations of LZ single crystal are simulated using DFT calculations with the generalized gradient approximation (GGA) functional. The anisotropic Young’s moduli are studied using two approaches: (1) stress-strain curve of large deformation, …
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Dynamics of Cell Packing and Polar Order in Developing Epithelia
… established. In particular we study the role of shear deformations on polarity pattern and show that the polarity of the tissue reorients during shear flow. Our simple mechanisms for ordering can account for the processes observed during development of the Drosophila wing.
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Critical Properties of the Emergent Random Solid in Vulcanization/gelation Transition
… random solid state is characterized by nonzero shear rigidity and particle localization (in high enough dimensions) about random positions, where their localization lengths are statistically distributed. Founded upon previous work that had constructed a replicated Landau-Wilson free energy for …
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Field-Scale Monitoring and Laboratory Simulation of Geosynthetic Liners During Construction and After Placement of Waste
Two physical issues of geomembrane wrinkle deformations and downslope shear deformations – that need to be considered to obtain good long-term geomembrane liner performance – are examined. First, field-scale monitoring of geomembrane wrinkles in a 1.5-mm-thick, black high-density polyethylene …
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Testing and constitutive modelling of saturated interfaces in dynamic soil-structure interaction.
Cyclic direct and simple-shear experiments are conducted on remolded clay-steel interfaces under undrained conditions and a constant normal stress. Also, a constitutive model for the stress-strain-pore-pressure behavior of cohesive soil interfaces under dynamic loading is developed using the new …
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Wellbore instability mechanisms in clays
… pressure inside the wellbore and the undrained shear deformations within the formations. The analyses predict critical mud pressure values necessary to maintain wellbore stability at different deviation angles and stress histories. The MIT-E3 model predicted higher deformations at reference mud …
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Assessment of Analytical Procedures for Designing Metal Buildings for Wind Drift Serviceability
… column-base rigidity. Also, effect of including shear deformations and considering the haunch (column-rafter junction) as rigid were studied. Another small but important part of the paper is comparison of wind pressures obtained using different procedure of ASCE 7-05 with database assisted design …
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