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 20 for “"Plate Elements"”.
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On the behavior of shear deformable plate elements
… of the behavior of shear deformable plate finite elements is conducted to determine why and under what conditions these elements lock, or become overly stiff. For this purpose, a new analytical technique is developed to derive the exact form of the shear constraints which are imposed …
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Analysis of rectangular concrete tanks considering interaction of plate elements
… one quarter of a rectangular tank. A rectangular plate element capable of both extension and flexure was used with appropriate coordinate transformations to enable interaction of the floor and wall plates. Moment values throughout the tank were determined but not collected into tables because of …
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Shear analysis of rectangular concrete tanks considering interaction of plate elements
… at any point within a one, two, or three plate system where plates are joined at ninety degree angles. Program options allow for tapered walls and combinations of both uniform and triangular loads for each type plate problem. The three plate solution process automatically imposes boundary …
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Concepts for retractable roof structures.
… by a two-dimensional ring of pantographic bar elements interconnected through simple revolute hinges. A concept for retractable roofs is then proposed by covering the bar elements with rigid cover plates. To prevent the cover plates from inhibiting the motion of the structure a theorem …
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Optimally stiffened thin shell structures in 3D printing.
… these techniques either use traditional finite elements or ignore shell contribution. The advantages of attaching stiffeners seamlessly to skin surface are: • Stiffeners can alleviate interior space compared to insertion of struts or Voronoi structure; • Stiffeners are less likely to cause …
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Nonlinear earthquake analysis of wall pier bridges
… earthquake analysis of wall pier bridges. Mixed plate elements are used to model the wall pier. The plate element has eight nodes and the degrees of freedom per node are three displacements and three moments. Beam elements are used to model the bridge deck. The beam element accounts for shear …
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Linear and nonlinear analyses of thick composite circular plates using the finite element method
A new finite element for circular plates based on Mindlin's shear-deformable plate theory is developed. Unlike conventional plate elements, these new elements may be stacked on top of one another to model laminated plates. The elements assure continuity of the displacements between the layers, but …
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Predicting the static bending behavior of pallets with panel decks
… stringer and block pallets were modeled using plate elements to simulate deck behavior and were validated by comparing predicted deflections to experimentally measured deflections. Differences were considerably less than the allowable 15 percent for both stringer and block models. Sensitivity …
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Java Applet for Teaching Finite Element Analysis
… The applet developed includes a wide range of elements including one-dimensional truss and beam elements, triangular and quadrilateral plane stress and plane strain elements, and two-dimensional four-node and eight-node iso-parametric elements and plate elements. Along with the applet there is …
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Aeroelasticity of wings coupling Navier-Stokes aerodynamics with wing-box finite elements
… integration of modal structural models based on plate elements. A finite element model was developed to handle three-dimensional wing boxes, and incorporated into the flow solver without the need for modal analysis. Static condensation is performed on the structural model to reduce the structural …
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Some aspects of the analysis of offshore structures
… theory is applicable for structures with, say, plate elements also), and in this connection wave forces on inclined frame members are considered. This is particularly useful for steel structures. A comparison is made between the results obtained by evaluating the forces 'consistently' and by …
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The elastic rigidities of ribbed plates
… flexural and twisting rigidities of orthotropic plates. Asymmetrically stiffened plates are examples of technically orthotropic plates and are found in civil engineering structures such as bridges and ribbed floor slabs. The formulae for the rigidities as found in the literature are reviewed. The …
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Evaluation of efficiency of partial hybrid finite element method using composite laminates with crack
… approach using partial hybrid finite elements is examined by the determination of interlaminar stress fields around interior delamination crack tips in composite laminates subjected to out-of-plane loading. The stress field consisting of both in-plane and out-of-plane components around …
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A study of the rank force method for structural matrix vibration analysis
… mass matrix, Endload, beam and rectangular plate elements are considered. Using these elements the rank force method is applied to a number of structural configurations to evaluate their eigenvalues. These results are compared with those obtained using alternative procedures. Element loads …
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Hierarchical modeling of laminated composite plates using variable kinematic finite elements and mesh superposition
… of localized 3-D effects in laminated composite plates. The model is developed using hierarchical, multiple assumed displacement fields at two different levels: (1) at the element level, and (2) at the mesh level. First, by superimposing a hierarchy of assumed displacement fields within the same …
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A Computational Framework for Zero Waste Structural Design
… modeling and analysis workflow for assemblies of plate elements. The results shown in this thesis prove zero waste design is a viable approach to structural design, demonstrating there are both practical and effective applications for the developed framework.
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Prebuckling and postbuckling behavior of stiffened composite panels with axial-shear stiffness coupling
… element analyses, based on two-dimensional plate elements, are utilized to address failure due to skin-stiffener separation by estimating the skin-stiffener attachment forces and moments at failure. The results of a parametric study which isolates the mechanisms which contribute to …
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Special finite elements for modelling adhesively bonded joints in two- and three-dimensions
… bonded joint is performed by using plane frame elements to model the adherends, and a single plane elasticity-type element through the thickness of the adhesive bondline. A similar approach was developed for the analysis of bonded joints in three-dimensions such that the adherends were modelled …
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Modellierung und Simulation eines Verbunds von Sandwichplatten zur Entwicklung einer mechanischen Verbindungstechnik
… In the framework of this thesis, only plate materials with steel face and a PUR foam core that is very common in the mechanical engineering applications are considered. The simulated loading case is the four-point-bending-test according to DIN 53293, which is established as a test …
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Aeroelastic Analysis of Rotor Blades Using Three Dimensional Flexible Multibody Dynamic Analysis
… has been developed specifically for folded plate and shell structures. The plate element does not suffer from either shear or aspect-ratio locking under transverse and membrane bending, respectively. A stiffened plate element has been developed that combines a shear deformable plate with a …