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Showing 1 to 14 of 14 for “"Curved structures"”.
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Transient behavior of curved structures
Slender curved structures can often be found as components of complex structures in civil, mechanical, and aerospace systems. Under extreme loadings, the structure might undergo snap-through buckling, i.e., the structure is forced to its inverted configuration, inducing fatigue. The focus of this …
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Dg And Hdg Methods For Curved Structures
<p>We introduce and analyze discontinuous Galerkin methods</p> <p>for a Naghdi type arch model. We prove that, when the numerical traces are properly chosen, the methods display optimal convergence uniformly with respect to the thickness of the arch. These methods are thus free from membrane and …
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Fast Assembly of Curved Structures from Flat Configuration
… a computational approach for designing freeform structures that can be rapidly assembled from initially flat configurations by a single string pull. Target structures are decomposed into rigid, spatially varied quad tiles optimized to approximate a user-provided surface, forming a flat mechanical …
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Elasto-plastic stress analysis of curved structures with rectangular section
… the elastic analysis technique in the field of curved structures. Recently the question of behavior beyond the yielding range has become increasingly important. By applying the methods of plastic analysis, the collapse load of a structure can be determined, and also the stress distribution and …
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Design computing of complex-curved geometry using digital fabrication methods
… construction as architectural models of complex curved walls built from unique units. A series of computer programs and physical models as examples of orthogonal, non-orthogonal, and complex curved walls as designs were developed. The wall examples here are built of non-uniform, interlocking …
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An investigation of the effects of curvatures on natural vibration characteristics of curved beams and plates
Curved structures are mostly investigated through the numerical method. In the numerical model, the curved beam or plate is easily simulated by assembled elements. Although the approximate solution can be obtained, numerical results are inadequate to demonstrate the effect of the curvature on the …
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Buckling and postbuckling of flat and curved laminated composite panels under thermomechanical loadings incorporating non-classical effects
… post buckling and vibration behavior of flat and curved composite panels under thermomechanical loadings are developed in this work. Both models are based on higher-order transverse shear deformation theories of shallow shells that include the effects of geometric nonlinearities and initial …
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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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Nonlinear vibration and chaotic motion of uniform and non-uniform carbon nanotube resonators.
… foundations. The nonlinear vibrations of the curved CNTs are developed using the Eringen theory in conjunction with the Euler-Bernoulli beam model and the thermal effect is also considered for the vibration of CNTs. The effects of fluid conveying flow, geometrical nonlinearities and Winkler …
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Fabricating silicon germanium waveguides by low pressure chemical vapor deposition
Low loss optical waveguide structures combining the high bandwidth of light transmission and the economics of silicon substrates have been made possible by Low Pressure Chemical Vapor Deposition (LPCVD). This work explores the fabrication, modeling, and testing of LPCVD Si Ge waveguides. Thesis …
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Analysis of a Helix Antenna Using a Moment Method Approach With Curved Basis and Testing Functions
Typically wire antenna structures are modeled by approximating curved structures with straight wire segments. The straight wire approximation yields accurate results, but often requires a large number of segments to adequately approximate the antenna geometry. The large number of straight wire …
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Wrinkling Patterns on Curved Surface with Gradient Curvature under Compression
… on understanding the wrinkling patterns on a curved surface, i.e., tori and cones, with varying curvatures and global deformation. By tuning the geometry confine-ment and material properties, we can control the surface morphologies in these systems which can potentially be applied to wide …
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The response of concave singly curved fibre reinforced moulded sandwich and laminated composite panels to blast loading
… the material and damage behaviour of these structures. In recent years, the increased frequency of wars and terror attacks have prompted investigations into composite failure processes resulting from air-blast. Most of the research has been focused on flat panels, whereas there is relatively …
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Stochastic modelling of the growth of carbonaceous materials
… oxygen (XO ≤ 10−4 and XO2 ≤ 10−2) result in structures that become curved as simulation time progresses. The highest mole fractions of atomic oxygen (XO > 10−2) produce small structures. The production and consumption of partially-embedded five-member rings are suggested to explain the …