Готові списки джерел за темами / Plate or shell theory

Добірка наукової літератури з теми "Plate or shell theory"

Автор: Grafiati
Опубліковано: 28 травня 2022

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Статті в журналах з теми "Plate or shell theory":

1

Zhang, Chao, De Jiang Shang, and Qi Li. "Effect of Drive Location on Vibro-Acoustic Characteristics of Submerged Double Cylindrical Shells with Damping Layers." Applied Mechanics and Materials 387 (August 2013): 59–63. http://dx.doi.org/10.4028/www.scientific.net/amm.387.59.

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Based on the modal superposition method, the analytical model of vibration and sound radiation from submerged double cylindrical shells with damping layers was presented. The shells were described by the classical thin shell theory. The damping layers were described by three-dimensional viscoelastic theory. The annular plates, connecting the double shells, were analyzed with in-plane motion theory. For different drive locations of radial point force on the inner shell, the sound radiated power and the radial quadratic velocity of the model were calculated and analyzed. The results show that making the drive location near the annular plate helps to reduce the sound radiated power and radial quadratic velocity of model, and making the drive location far from the middle of model also helps to reduce the sound radiated power. The drive applied on the location of annular plate causes high similarity of vibrations from inner shell and outer shell.
2

Wang, Fan. "Continuum Analysis for Plate-Cone Spherical Reticulated Shell." Advanced Materials Research 317-319 (August 2011): 124–27. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.124.

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Plate-cone reticulated shell is a new type of space structures with good mechanical behavior and technical economy. In this paper, a continuum analysis method for plate-cone spherical reticulated shell which is equated to three layers thin shell is put forward. Based on mechanical characteristics of plate-cone spherical reticulated shell, the equivalent stiffness is derived through the theory of elasticity. Then, plate-cone spherical reticulated shell is equated to a special type of three layers thin shell working interactively, the governing differential equations are derived on the basis of the theory of thin shells, these differential equations being from the displacement method and the mixed method of derivation. The solution of this system of differential equations gives the displacements and internal forces of plate-cone spherical reticulated shell.
3

Zhang, WX. "Numerical Analysis of Cylindrical Shell under Axial Impact." E3S Web of Conferences 236 (2021): 05040. http://dx.doi.org/10.1051/e3sconf/202123605040.

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The shell mainly resists the external load by the mid plane stress distributed uniformly along the thickness, rather than the bending stress varying along the thickness. Compared with the traditional flat plate, the shell can make full use of the material strength, so it has greater bearing capacity. In water conservancy projects, shells are widely used, such as double curvature flat shell gate, arch dam and so on. Thin shell theory is a classical theory in shell.
4

Wang, Xing, Chao Feng, and Nie Chen. "Buckling Analysis of Composite Plates in Plate-Cone Reticulated Shell." Applied Mechanics and Materials 427-429 (September 2013): 10–13. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.10.

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Plate-cone reticulated shell is a new type of space structures with good mechanical behavior and technical economy. In this paper, local buckling and influence factors of composite plates in plate-cone reticulated shell are analyzed with theory of composite plate and shell through composite structure finite element method, and the mechanical characteristics of composite plate-cone reticulated shell are studied, some important conclusions were obtained, which can provide theoretical foundation for practical design of composite plate-cone reticulated shell and composite plates.
5

Wang, Xing. "Analysis for Composite Material in Plate-Cone Reticulated Shell." Applied Mechanics and Materials 174-177 (May 2012): 925–28. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.925.

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Plate-cone reticulated shell is a new type of space structures with good mechanical behavior and technical economy. Composite material plate is light and strength is high, its ratio intensity is higher a lot than steel material, and elasticity property can be designed, so composite material plate specially applies to prefabricated cone unit of plate-cone reticulated shell. In this paper, GRP plate is regarded as linear elastic material from a view to the engineering application, the multi-layer plate element stiffness matrix is derived with the classic theory of plate and shell, and the GRP plate is designed with equivalent method. Furthermore, the static characteristics for plate-cone reticulated shell with composite material plates are also analyzed in the paper. It is proved by the study that plate-cone reticulated shell with composite material plates is more advantageous and has wide application foreground.
6

Chen, Z. P., Y. Y. Duan, J. M. Shen, and J. L. Jiang. "A simplified method for calculating the stress of a large storage tank wall." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 221, no. 3 (August 1, 2007): 119–27. http://dx.doi.org/10.1243/09544089jpme125.

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With consideration of the influences from the constraint reaction of tank bottom plate to each shell course, a simplified long-short shell method was proposed to calculate the stress of a large storage tank wall. The first shell course was regarded as a short cylindrical shell while all the others as long cylindrical shells, and the analytic solution equations of shell stress were achieved by theory of plates and shells. With resistance stress-strain method, a field stress test was done on a 15x104 m3 floating-roof oil tank during its water filling test, and the measured stress data are in good agreement with the calculation results obtained by this simplified calculation method for shell stress. Therefore, the simplified method can be adopted to calculate the shell stress of large storage tanks accurately.
7

Thangaratnam, Kari, and Evangeline Kumar. "Investigation on Application of Semiloof Shell Element for Isotropic, Composite and Functionally Graded Material." Applied Mechanics and Materials 877 (February 2018): 372–77. http://dx.doi.org/10.4028/www.scientific.net/amm.877.372.

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In this research article, semiloof shell element was used to study the behaviour of plate and shells under mechanical and thermal load for stress, free vibration, initially stressed vibration, mechanical buckling, and non-linear vibration. In the above cases, the material properties: Isotropic, Composite and Functionally Graded Material (FGM) were considered. Wherein, the material property for the FGM shells was assumed to vary through the thickness of the shell by varying the volume fraction of the constituent, whereas, for composites, classical laminated theory was used. Utilizing the semiloof shell element, and the above material properties, the package COMSAP was developed. From the obtained results, we have observed that with coarse meshes, semiloof shell elements present better results, and it is especially effective in the case of thin plates and shells.
8

Zhu, Yong Yong. "Research on Vibro-Acoustic Characteristics of Underwater Finite Plate-Shell Structure under Multiple Excitations." Advanced Materials Research 834-836 (October 2013): 1351–59. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.1351.

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An analysis based on the first kind of Lagranges equations was presented for investigating the vibration and acoustic radiation of underwater finite cylindrical shell with interior plate under multiple excitations. The strain energy and kinetic energy of cylinder and plate were gained by the theory of plates and shells, and the potential energy of excitation and fluid loading was found based on acoustic-vibration coupling, and the connection conditions of plate and cylinder were expressed by Lagrange multipliers, then the vibro-acoustic equations of finite cylinder with interior plate under shafting excitation were established. The influences of excitations and plates position to the vibro-acoustic characteristics were studied by the equations. The results show that the frequency components of plate-shell structure are more complex. For the double excitations on plate, the distance between excitations is larger, the average velocity and sound radiation power are lower, while the radiation efficiency is larger. The modeling and analytical methods adopted in this paper are also available for more complex composite structure.
9

Soleimani, Iman, Yaghoub Tadi Beni, and Mohsen Botshekanan Dehkordi. "Size-dependent two-node axisymmetric shell element for buckling analysis with couple stress theory." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 13 (February 14, 2019): 4729–41. http://dx.doi.org/10.1177/0954406219830124.

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In this paper, two-node size-dependent axisymmetric shell element formulation is developed by using thin conical shell model in the place of the beam model, which is used in previous research and using the modified couple stress theory in the place of the classical continuum theory. Since classical continuum theory is unable to correctly compute stiffness and account for size effects in micro/nanostructures, higher order continuum theories such as modified couple stress theory have become quite popular. The mass stiffness matrix and geometric stiffness matrix for axisymmetric shell element are developed in this paper, and by means of size-dependent finite element formulation it is extended to more precisely account for nanotube buckling. The results have indicated using the two-node axisymmetric shell element, where the rigidity of the nano-shell is greater than that in the classical, and the critical axial buckling loads obtained from couple stress theory are greater than that of classical, which is due to the presence of one size parameter in couple stress theory. The findings also indicate that the developed size-dependent axisymmetric shell element is able to analyze the buckling of cylindrical and conical shells and also circular plate, which is reliable for simulating micro/nanostructures and can be used for the analysis of size effect and has desirable convergence characteristic. Besides, in addition to reducing the number of elements required, using axisymmetric shell element also increases convergence speed and accuracy.
10

Soldatos, K. P. "A refined laminated plate and shell theory with applications." Journal of Sound and Vibration 144, no. 1 (January 1991): 109–29. http://dx.doi.org/10.1016/0022-460x(91)90736-4.

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Статті в журналах Дисертації Книги

Дисертації з теми "Plate or shell theory":

1

Lee, Seung Joon. "Nonlinear analysis of smart composite plate and shell structures." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969.1/2218.

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Theoretical formulations, analytical solutions, and finite element solutions for laminated composite plate and shell structures with smart material laminae are presented in the study. A unified third-order shear deformation theory is formulated and used to study vibration/deflection suppression characteristics of plate and shell structures. The von K??rm??n type geometric nonlinearity is included in the formulation. Third-order shear deformation theory based on Donnell and Sanders nonlinear shell theories is chosen for the shell formulation. The smart material used in this study to achieve damping of transverse deflection is the Terfenol-D magnetostrictive material. A negative velocity feedback control is used to control the structural system with the constant control gain. The Navier solutions of laminated composite plates and shells of rectangular planeform are obtained for the simply supported boundary conditions using the linear theories. Displacement finite element models that account for the geometric nonlinearity and dynamic response are developed. The conforming element which has eight degrees of freedom per node is used to develop the finite element model. Newmark's time integration scheme is used to reduce the ordinary differential equations in time to algebraic equations. Newton-Raphson iteration scheme is used to solve the resulting nonlinear finite element equations. A number of parametric studies are carried out to understand the damping characteristics of laminated composites with embedded smart material layers.
2

Weise, Michael. "A framework for efficient hierarchic plate and shell elements." Universitätsbibliothek Chemnitz, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-233175.

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The Mindlin-Reissner plate model is widely used for the elastic deformation simulation of moderately thick plates. Shear locking occurs in the case of thin plates, which means slow convergence with respect to the mesh size. The Kirchhoff plate model does not show locking effects, but is valid only for thin plates. One would like to have a method suitable for both thick and thin plates. Several approaches are known to deal with the shear locking in the Mindlin-Reissner plate model. In addition to the well-known MITC elements and other approaches based on a mixed formulation, hierarchical methods have been developed in the recent years. These are based on the Kirchhoff model and add terms to account for shear deformations. We present some of these methods and develop a new hierarchic plate formulation. This new model can be discretised by a combination of C0 and C1 finite elements. Numerical tests show that the new formulation is locking-free and numerically efficient. We also give an extension of the model to a hierarchical Naghdi shell based on a Koiter shell formulation with unknowns in Cartesian coordinates.
3

Weise, Michael. "A framework for efficient hierarchic plate and shell elements." Technische Universität Chemnitz, 2017. https://monarch.qucosa.de/id/qucosa%3A20867.

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The Mindlin-Reissner plate model is widely used for the elastic deformation simulation of moderately thick plates. Shear locking occurs in the case of thin plates, which means slow convergence with respect to the mesh size. The Kirchhoff plate model does not show locking effects, but is valid only for thin plates. One would like to have a method suitable for both thick and thin plates. Several approaches are known to deal with the shear locking in the Mindlin-Reissner plate model. In addition to the well-known MITC elements and other approaches based on a mixed formulation, hierarchical methods have been developed in the recent years. These are based on the Kirchhoff model and add terms to account for shear deformations. We present some of these methods and develop a new hierarchic plate formulation. This new model can be discretised by a combination of C0 and C1 finite elements. Numerical tests show that the new formulation is locking-free and numerically efficient. We also give an extension of the model to a hierarchical Naghdi shell based on a Koiter shell formulation with unknowns in Cartesian coordinates.:1 Introduction 2 Plate theory 3 Shell theory 4 Conclusion
4

McDaniel, James Gregory. "A new higher-order shell theory for vibration and viscoelastically-coated circular cylindrical shells." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/15825.

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5

Liu, Chorng-Fuh. "Geometrically nonlinear analysis of composite laminates using a refined shear deformation shell theory." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54453.

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The theory is based on an assumed displacement field, in which the surface displacements are expanded in powers of the thickness coordinate up to the third order. The theory allows parabolic description of the transverse shear stresses, and therefore the shear correction factors of the usual shear deformation theory are not required in the present theory. The theory accounts for small strains but moderately large displacements (i.e., von Karman strains). Exact solutions for certain cross-ply shells and finite-element models of the theory are also developed. The finite-element model is based on independent approximations of the displacements and bending moments (i.e., mixed formulation), and therefore only C°-approximations are required. Further, the mixed variational formulations developed herein suggest that the bending moments can be interpolated using discontinuous approximations (across inter-element boundaries). The finite element is used to analyze cross-ply and angle-ply laminated shells for bending, vibration, and transient response. Numerical results are presented to show the effects of boundary conditions, lamination scheme (i.e., bending-stretching coupling and material anisotropy) shear deformation, and geometric nonlinearity on deflections and frequencies. Many of the numerical results presented here for laminated shells should serve as references for future investigations.
Ph. D.
6

Dirgantara, Tatacipta. "Boundary element analysis of cracks in shear deformable plates and shells." Thesis, Queen Mary, University of London, 2000. http://qmro.qmul.ac.uk/xmlui/handle/123456789/28855.

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This thesis presents new boundary element formulations for solution of bending problems in plates and shells. Also presented are the dual boundary element formulations for analysis of crack problems in plates and shells. Reissner plate theory is adopted to represent the bending and shear, and two dimensional (2-D) plane stress is used to model the membrane behaviour of the plate. New set of boundary element formulations to solve bending problems of shear deformable shallow shells having quadratic mid-surface is derived based on the modified Reissner plate and two dimensional plane stress governing equations which are now coupled due to the curvature of the shell. Dual Boundary Element Methods (DBEM) for plates and shells are developed for fracture mechanics analysis of structures loaded in combine bending and tension. Five stress intensity factors, that is, two for membrane and three for bending and shear are computed. The JIntegral technique and Crack Surface Displacements Extrapolation (CSDE) technique are used to compute the stress intensity factors. Special shape functions for crack tip elements are implemented to represent mom accurately displacement fields close to the crack tip. Crack growth processes are simulated with an incremental crack extension analysis. During the simulation, crack growth direction is determined using the maximum principal stress criterion. The crack extension is modelled by adding new boundary elements to the previous crack boundaries. As a consequence remeshing of existing boundaries is not required, and using this method the simulation can be effectively performed. Finally, a multi-region boundary element formulation is presented for modelling assembled plate-structures. The formulation enforces the compatibility of translations and rotations as well as equilibrium of membrane, bending and shear tractions. Examples are presented for plate and shell structures with different geometry, loading and boundar-y conditions to demonstrate the accuracy of the proposed formulations. The results obtained are shown to be in good agreement with analytical and other numerical results. Also presented are crack growth simulations of flat and curved panels loaded in combine bending and tension. The DBEM results are in good agreement with existing numerical and experimental results. Assembled plate-structure and a non-shallow shell bending problems are also analysed using a multi-region formulation developed in this thesis.
7

Bydalek, David Russell. "Manufacture of Complex Geometry Component for Advanced Material Stiffness." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1919.

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The manufacture, laminate design, and modeling of a part with complex geometry are explored. The ultimate goal of the research is to produce a model that accurately predicts part stiffness. This is validated with experimental results of composite parts, which refine material properties for use in a final prototype part model. The secondary goal of this project is to explore manufacturing methods for improved manufacturability of the complex part. The manufacturing portion of the thesis and feedback into material model has incorporated a senior project team to perform research on manufacturing and create composite part to be used for experimental testing. The senior project was designed, led, and managed by the author with support from the committee chair. Finite element modeling was refined using data from coupon 3-point bend testing to improve estimates on material properties. These properties were fed into a prototype part model which predicted deflection of composite parts with different layups and materials. The results of the model were compared to experimental results from prototype part testing and 3rd party analysis. The results showed that an accurate mid-plane shell element model could be used to accurately predict deflection for 2 of 3 experimental parts. There are recommendations in the thesis to further validate the models and experimental testing.
8

Wei, Guoqiang. "Towards overall adaptive modeling based on solid-shell and solid-beam approaches for the static and dynamic finite element analysis of structures." Thesis, Compiègne, 2021. https://bibliotheque.utc.fr/Default/doc/SYRACUSE/2021COMP2618.

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La méthode des éléments finis est couramment utilisée depuis les années 1970 pour prédire le comportement de structures telles que des automobiles, des avions, des machines, des ponts ou des bâtiments. Les choix de modélisation sont essentiels afin de construire un modèle représentatif, tout en maîtrisant le nombre de degrés de liberté. De nombreux travaux ont cherché à optimiser le modèle d’un point de vue du maillage en proposant notamment des techniques de maillage adaptatif. En revanche, concernant le choix de théorie, peu de travaux ont été menés pour obtenir un modèle éléments finis optimal. Dans le contexte de l’analyse linéaire statique et vibratoire, cette thèse a pour objectif de proposer une méthodologie de modélisation adaptative afin d’obtenir un modèle éléments finis optimal d’un point de vue du choix de théorie. Le maillage, composé uniquement d’éléments volumiques, est raffiné à chaque itération de la méthodologie. Un choix approprié entre les théories de poutre, de coque et d’élasticité 3D est effectué sur chaque élément fini à l’issue de chaque analyse. Dans les zones où les théories de poutre ou de coque sont pertinentes, des champs de déplacements spécifiques sont appliqués. De nouvelles approches volume-coque et volume-poutre, basées respectivement sur la théorie des coques et la théorie des poutres, sont développées à cet effet. Pour chacune de ces approches, des théories de premier ordre et d’ordre supérieur sont proposées. Dans ces zones l’application de relations cinématiques aux noeuds du maillage volumique, se traduisant par des équations linéaires, mène à une réduction du nombre de degrés de liberté. Dans le cadre de l’analyse statique et vibratoire, plusieurs exemples sont traités pour évaluer la méthodologie de modélisation adaptative. Les résultats numériques obtenus sont toujours très proches de ceux d’un modèle volumique de référence et la modélisation adaptative mène à une réduction significative de la taille du modèle
The finite element method has been widely used since the 1970s to predict the behavior of structures such as automobiles, airplanes, machines, bridges or buildings. The modeling choices are essential to build a representative model and control the number of degrees of freedom. Many works have sought to optimize the model from a mesh point of view, namely by proposing adaptive meshing techniques. On the other hand, concerning the theory choice, seldom work has been carried out to obtain an optimal finite element model. In the context of static and vibratory linear analysis, this thesis aims to propose an adaptive modeling methodology in order to obtain an optimal finite element model from the theory choice point of view. The mesh, composed only of solid elements, is refined at each iteration of the methodology. An appropriate choice between beam, shell and 3D elasticity theories is made on each finite element of the model at each analysis. In areas where beam or shell theories are relevant, specific displacement fields are applied. New solid-shell and solid-beam approaches, based respectively on shell theory and beam theory, have been developed for this purpose. For each of these two approaches, first-order and higher-order theories are proposed. In these areas, the application of kinematic relations at nodes of the solid mesh, by using linear equations, leads to a reduction of the number of degrees of freedom. In the context of static and vibratory analysis, several examples are treated to evaluate the methodology of adaptive modeling. The numerical results obtained are always very close to those of a reference solid model and the adaptive modeling method leads to a significant reduction in the model size
9

Kassegne, Samuel Kinde. "Layerwise theory for discretely stiffened laminated cylindrical shells." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-07282008-134249/.

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10

Huang, H.-C. "Defect-free shell elements." Thesis, Swansea University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378091.

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Книги з теми "Plate or shell theory":

1

Jawad, Maan H. Theory and Design of Plate and Shell Structures. Boston, MA: Springer US, 1994.

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2

Jawad, Maan H. Theory and design of plate and shell structures. New York: Chapman & Hall, 1994.

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3

Jawad, Maan H. Theory and Design of Plate and Shell Structures. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2656-8.

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4

Vekua, Ilʹi͡a Nestorovich. Shell theory, general methods of construction. Boston: Pitman Advanced Pub. Program, 1986.

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5

Sanchez-Palencia, E. Singular problems in shell theory: Computing and asymptotics / Evariste Sanchez-Palencia, Olivier Millet, Fabien Béchet. Berlin: Springer, 2010.

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6

Niordson, Frithiof I. Shell theory. Amsterdam: North-Holland, 1985.

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7

Radwanska, Maria, Anna Stankiewicz, Adam Wosatko, and Jerzy Pamin. Plate and Shell Structures. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118934531.

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8

Shalit, Amos de. Nuclear shell theory. Mineola, N.Y: Dover Publications, 2004.

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9

Jawad, Maan H. Design of plate and shell structures. New York: ASME Press, 2004.

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10

Axelrad, E. L. Theory of flexible shells. Amsterdam: North-Holland, 1987.

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Частини книг з теми "Plate or shell theory":

1

Gan, Buntara S. "Theory of Plate and Shell Elements." In Condensed Isogeometric Analysis for Plate and Shell Structures, 79–111. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/9780429399824-3.

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2

Ugural, Ansel C. "Plate-Bending Theory." In Plates and Shells, 91–126. Fourth edition. | Boca Raton : CRC Press, [2018] | Series: Applied and computational mechanics | Original edition published under the title: Stresses in plates and shells / Ansel C. Ugural. |Includes bibliographical references and index.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315104621-5.

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3

Lebée, Arthur, and Karam Sab. "The Bending-Gradient Theory for Laminates and In-Plane Periodic Plates." In Shell-like Structures, 113–48. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42277-0_3.

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4

Jawad, Maan H. "Membrane Theory of Shells of Revolution." In Theory and Design of Plate and Shell Structures, 163–92. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2656-8_6.

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Jawad, Maan H. "Various Applications of the Membrane Theory." In Theory and Design of Plate and Shell Structures, 193–220. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2656-8_7.

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Jawad, Maan H. "Buckling of Plates." In Theory and Design of Plate and Shell Structures, 283–99. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2656-8_10.

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Jawad, Maan H. "Bending of Circular Plates." In Theory and Design of Plate and Shell Structures, 71–111. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2656-8_3.

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Jawad, Maan H. "Approximate Analysis of Plates." In Theory and Design of Plate and Shell Structures, 112–41. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2656-8_4.

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9

Jawad, Maan H. "Buckling of Cylindrical Shells." In Theory and Design of Plate and Shell Structures, 300–337. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2656-8_11.

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Jawad, Maan H. "Bending of Various Rectangular Plates." In Theory and Design of Plate and Shell Structures, 39–70. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2656-8_2.

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Тези доповідей конференцій з теми "Plate or shell theory":

1

White, John A. "Air Cleaner Shell Noise Analysis with Plate and Shell Theory." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1996. http://dx.doi.org/10.4271/960301.

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2

Awrejcewicz, Jan, and Vadim A. Krysko. "Optimization of Plate and Shell Surfaces." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8139.

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Abstract A problem of plate and shell surface optimisation has been formulated and solved. The corresponding theorem has been stated and proved. An algorithm for an optimal surface search has been proposed and its reliability has been discussed. Three examples have illustrated both the introduced theory and the numerical algorithm.
3

Tzou, H. S., and J. P. Zhong. "Theory on Hexagonal Symmetrical Piezoelectric Thick Shells Applied to Smart Structures." In ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0179.

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Abstract Smart piezoelectric structures, conventional passive materials integrated with piezoelectric sensors, actuators and control electronics, have great potentials in many engineering applications. This paper is devoted to a new theoretical development of generic piezoelectric shell distributed systems. System electromechanical dynamic equations, three translational coordinates and two rotatory coordinates, and boundary conditions, electric and mechanical, for a thick piezoelectric shell continuum with symmetrical hexagonal structure (Class C6v = 6mm) are derived using Hamilton’s principle and linear piezoelectric theory. The thick shell system equations are simplified to thin piezoelectric shells using Kirchhoff-Love’s assumptions. Converse effect induced electric forces/moments and boundary conditions can be used to alter system dynamics via open or closed loop control systems. Applications of the theories to a thick plate and a spherical shell are demonstrated in case studies.
4

Birman, Victor, and George J. Simitses. "Theory of Box-Type Sandwich Shells With Dissimilar Facings Subjected to Thermomechanical Loads." In ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-0374.

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Abstract The present paper outlines a theory of sandwich box-type composite shells designed to withstand a combination of thermal loading, internal pressure, torsional and axial loads. A cross section of the shell represents a rectangular box with curved cylindrical sections at the corners. The facings of the shell are dissimilar to maximize their efficiency, according to the loads acting on each facing. This approach enables a designer to optimize the structure by maximizing the load-carrying capacity or minimizing the weight. The formulation includes the following developments: 1. Global theory of a sandwich shell composed of rectangular and cylindrical sections. Equations of motion are formulated based on a first-order shear deformable version of Sanders’ shell theory. 2. Theory for local deformations and stresses in the facings. The facing is treated as a thin geometrically nonlinear plate or shell on an elastic foundation using von Karman’s approach. The elastic foundation represents a support provided by the opposite facing. 3. An outline of an enhanced micromechanical constitutive formulation based on the incorporation of the effect of the thermomechanical coupling on the material properties and temperature.
5

Kobayashi, Nobuyuki, Toshiki Tashita, Sho Takizawa, and Tomoyo Taniguchi. "Simplified Rocking Model of Unanchored Cylindrical Tank Including Baseplate Uplift and Cross Sectional Deformation of Tank Shell due to Seismic Load." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45082.

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This study presents a simplified estimation method on the rocking behavior of the unanchored cylindrical liquid storage tank of which baseplate uplifts partially from its soil foundation and of which shell plate distorts its circular cross-section due to the horizontal seismic loads. Since the vertical reaction force distribution along the bottom end of shell plate, which yields resistant moment against the overturning moment due to the horizontal seismic load, deflects from sinusoidal when its baseplate uplifts partially. The out-of-plane deformation is induced in the shell plate of tank due to the axial force in the shell plate of higher harmonic number than the sinusoidal mode because of the partially uplifting of the base plate. This feature brings the vertical displacement along the bottom of shell plate redistribution, and it affects the buckling strength at the compression side of the shell plate and the bending strength at the uplifting side of the joint between the cylindrical shell plate and the baseplate. To take such a rocking behavior into account, the vertical reaction force distribution acting on the bottom of the shell plate is expanded with Fourier series and the out-of-plane deformation of shell plate is derived by the membrane theory of shell for each coefficient of Fourier series. Numerical results of tank deformations calculated by the present method are compared with those obtained by a commercial FEM code.
6

Garr, Dale G., and Frederick H. Ashcroft. "Swage panel Analyses: Effective Orthotropic and Laminated Plate Properties." In SNAME 5th World Maritime Technology Conference. SNAME, 2015. http://dx.doi.org/10.5957/wmtc-2015-221.

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Analytical expressions for the effective elastic properties of orthotropic, and laminated plates are presented for represented for representing swage panel subjected to extension and bending. A methodology is described for analyzing the swaged panels as effective, orthotropic flat plates. The equivalent rigidities of the laminated plating are established by matching the in-plane and flexural stiffness of the swage panel with those of the laminated plate. The required properties of the effective plating include the dependent Young’s modulii, shear modulus and Poisson’s ratios for each layer of a multi-layered elastic laminate. Three-ply and five-ply models are developed. This methodology allows for the use of well-known plate theory equations or assessing plate strength and stability. It also allows for the use of large-scale finite element modeling of the panels within conventional simulation packages such as those used for whole-ship structural modeling. The advantage in this analytical approach is to avoid the need for modeling the detailed, fine-scaled swage shell geometry in finite element analyses.
7

Sotoudeh, Zahra. "A Finite Element Solution for Fully Intrinsic Plate Theory." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36807.

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The fully intrinsic equations for plates (and analogous ones for shells), although equally as elegant as the corresponding beam equations, have neither been used for general-purpose finite element nor multi-flexible-body analysis. The fully intrinsic equations for plates have the same advantages of fully intrinsic equations for beams. These equations are geometrically exact, the highest order of nonlinearities is only of second order, and they do not include rotation parameters. We present a finite element formulation for these equations, and then investigate different possible boundary conditions and loading situations on simplified linear version.
8

Taniguchi, Tomoyo, Teruhiro Nakashima, and Daisuke Okui. "Approximation of Uplift of Flat-Bottom Cylindrical Tanks and Effects of Out-of-Plane Deformation of Cylindrical Shell on it." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45083.

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For the unanchored flat-bottom cylindrical tanks located in the seismic prone area, uplift of the tank bottom plate is inevitable. Besides the work of Nakashima, effects of out-of-plane deformation of the cylindrical shell on uplift of the tank bottom plate have been paid little attention. In analyzing uplift of the tank bottom plate, for design purpose in particular, its effects should be included. First, employing a cylindrical shell tanks with multistage rigid or elastic stiffeners, their uplift responses to the horizontal sinusoidal base acceleration are compared to highlight effects of out-of-plane deformation on uplift of the tank bottom plate. Next, employing the numerical results of the cylindrical shell tank with multistage rigid stiffeners, analytical accuracy of the simplified calculation for evaluating the angular acceleration accompanying the tank rock motion is examined.
9

Wang, D. W., H. S. Tzou, and H. J. Lee. "Control of Largely-Deformed Nonlinear Electro/Elastic Beam and Plate Systems: Finite Element Formulation and Analysis." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32329.

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Adaptive structures involving large imposed deformation often go beyond the boundary of linear theory and they should be treated as “nonlinear” structures. A generalized nonlinear finite element formulation for vibration sensing and control analysis of laminated electro/elastic nonlinear shell structures is derived based on the virtual work principle. A generic curved triangular piezoelectric shell element is proposed based on the layerwise constant shear angle theory. The dynamic system equations, equations of electric potential output and feedback control force defined in a matrix form are derived. The modified Newton-Raphson method is adopted for nonlinear dynamic analysis of large and complex piezoelectric/elastic/control structures. The developed piezoelectric shell element and finite element code are validated and then applied to control analysis of flexible electro-elastic (piezoelectric/elastic) structural systems. Vibration control of constant-curvature electro/elastic beam and plate systems is studied. Time-history responses of free and controlled nonlinear electro/elastic beam and plate systems are presented and nonlinear effects discussed.
10

Cho, H. K., and R. E. Rowlands. "Maximizing Buckling Strength of Perforated Composite Laminates by Optimizing Fiber Orientation Using Genetic Algorithm." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13895.

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This paper demonstrates ability to significantly increase buckling loads of perforated composite laminated plates by synergizing FEM and a genetic optimization algorithm (GA). Plate geometry is discretized into specially-developed 3D degenerated eight-node shell isoparametric layered composite elements. General shell theory, involving incremental nonlinear finite element equilibrium equation, is employed. Fiber orientation within individual plies of each element is controlled independently by the genetic algorithm. Eigen buckling analysis is performed using the subspace iteration method. Available results demonstrate the approach is superior to more conventional methodologies such as modifying ply thickness or the stacking sequence of individual rectilinear plies having common fiber orientation through the plate.

Звіти організацій з теми "Plate or shell theory":

1

Lamb, Thomas. Shell Plate Definition Guide for Ship Designers (The National Shipbuilding Research Program). Fort Belvoir, VA: Defense Technical Information Center, May 1994. http://dx.doi.org/10.21236/ada454992.

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2

Lamb, Thomas, Thomas Perrine, Shelby Anderson, and Eddie Adler. The National Shipbuilding Research Program. Limitations of Computerized Lofting for Shell Plate Development. Fort Belvoir, VA: Defense Technical Information Center, March 1994. http://dx.doi.org/10.21236/ada454355.

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3

Smith, Brandon M., Jerry S. Brock, and Todd O. Williams. Linear and Nonlinear Wave Theory Applied to Elastic Spherical Shell Test Problems. Office of Scientific and Technical Information (OSTI), December 2012. http://dx.doi.org/10.2172/1058049.

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4

Chriscoe, Mackenzie, Rowan Lockwood, Justin Tweet, and Vincent Santucci. Colonial National Historical Park: Paleontological resource inventory (public version). National Park Service, February 2022. http://dx.doi.org/10.36967/nrr-2291851.

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Colonial National Historical Park (COLO) in eastern Virginia was established for its historical significance, but significant paleontological resources are also found within its boundaries. The bluffs around Yorktown are composed of sedimentary rocks and deposits of the Yorktown Formation, a marine unit deposited approximately 4.9 to 2.8 million years ago. When the Yorktown Formation was being deposited, the shallow seas were populated by many species of invertebrates, vertebrates, and micro-organisms which have left body fossils and trace fossils behind. Corals, bryozoans, bivalves, gastropods, scaphopods, worms, crabs, ostracodes, echinoids, sharks, bony fishes, whales, and others were abundant. People have long known about the fossils of the Yorktown area. Beginning in the British colonial era, fossiliferous deposits were used to make lime and construct roads, while more consolidated intervals furnished building stone. Large shells were used as plates and dippers. Collection of specimens for study began in the late 17th century, before they were even recognized as fossils. The oldest image of a fossil from North America is of a typical Yorktown Formation shell now known as Chesapecten jeffersonius, probably collected from the Yorktown area and very likely from within what is now COLO. Fossil shells were observed by participants of the 1781 siege of Yorktown, and the landmark known as “Cornwallis Cave” is carved into rock made of shell fragments. Scientific description of Yorktown Formation fossils began in the early 19th century. At least 25 fossil species have been named from specimens known to have been discovered within COLO boundaries, and at least another 96 have been named from specimens potentially discovered within COLO, but with insufficient locality information to be certain. At least a dozen external repositories and probably many more have fossils collected from lands now within COLO, but again limited locality information makes it difficult to be sure. This paleontological resource inventory is the first of its kind for Colonial National Historical Park (COLO). Although COLO fossils have been studied as part of the Northeast Coastal Barrier Network (NCBN; Tweet et al. 2014) and, to a lesser extent, as part of a thematic inventory of caves (Santucci et al. 2001), the park had not received a comprehensive paleontological inventory before this report. This inventory allows for a deeper understanding of the park’s paleontological resources and compiles information from historical papers as well as recently completed field work. In summer 2020, researchers went into the field and collected eight bulk samples from three different localities within COLO. These samples will be added to COLO’s museum collections, making their overall collection more robust. In the future, these samples may be used for educational purposes, both for the general public and for employees of the park.
5

Hughes, Thomas J. An Assessment of Modelling Techniques for the Finite Element Analysis of Reinforced Concrete Plate and Shell Structures. Fort Belvoir, VA: Defense Technical Information Center, February 1988. http://dx.doi.org/10.21236/ada192263.

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6

Gu, Ming F., Tomer Holczer, Ehud Behar, and Steven M. Kahn. Inner-Shell Absorption Lines of Fe 6-Fe 16: a Many-Body Perturbation Theory Approach. Office of Scientific and Technical Information (OSTI), January 2006. http://dx.doi.org/10.2172/878002.

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7

Santos, H. A., J. A. Evans, and T. J. Hughes. Generalization of the Twist-Kirchhoff Theory of Plate Elements to Arbitrary Quadrilaterals and Assessment of Convergence. Fort Belvoir, VA: Defense Technical Information Center, July 2011. http://dx.doi.org/10.21236/ada555338.

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8

Warrick, Arthur, Uri Shani, Dani Or, and Muluneh Yitayew. In situ Evaluation of Unsaturated Hydraulic Properties Using Subsurface Points. United States Department of Agriculture, October 1999. http://dx.doi.org/10.32747/1999.7570566.bard.

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The primary information for accurately predicting water and solute movement and their impact on water quality is the characterization of soil hydraulic properties. This project was designed to develop methods for rapid and reliable estimates of unsaturated hydraulic properties of the soil. Particularly, in situ methodology is put forth, based on subsurface point sources. Devices were designed to allow introduction of water in subsurface settings at constant negative heads. The ability to operate at a negative head allows a direct method of finding unsaturated soil properties and a mechanism for eliminating extremely rapid preferential flow from the slow matrix flow. The project included field, laboratory and modeling components. By coupling the measurements and the modeling together, a wider range of designs can be examined, while at the same time realistic performance is assured. The developed methodology greatly expands the possibilities for evaluating hydraulic properties in place, especially for measurements in undisturbed soil within plant rooting zones. The objectives of the project were (i) To develop methods for obtaining rapid and reliable estimates of unsaturated hydraulic properties in situ, based on water distribution from subsurface point sources. These can be operated with a constant flow or at a constant head; (ii) To develop methods for distinguishing between matrix and preferential flow using cavities/permeameters under tension; (iii) To evaluate auxiliary measurements such as soil water content or tensions near the operating cavities to improve reliability of results; and (iv: To develop numerical and analytical models for obtaining soil hydraulic properties based on measurements from buried-cavity sources and the auxiliary measurements. The project began in July 1995 and was terminated in November 1998. All of the objectives were pursued. Three new subsurface point sources were designed and tested and two old types were also used. Two of the three new designs used a nylon cloth membrane (30 mm) arranged in a cylindrical geometry and operating at a negative water pressure (tension). A separate bladder arrangement allowed inflation under a positive pressure to maintain contact between the membrane and the soil cavity. The third new design used porous stainless steel (0.5 and 5 mm) arranged in six segments, each with its own water inlet, assembled to form a cylindrical supply surface when inflated in a borehole. The "old" types included an "off-the-shelf" porous cup as well as measurements from a subsurface drip emitter in a small subsurface cavity. Reasonable measurements were made with all systems. Sustained use of the cloth membrane devices were difficult because of leaks and plugging problems. All of the devices require careful consideration to assure contact with the soil system. Steady flow was established which simplified the analysis (except for the drip emitter which used a transient analysis).

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