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Showing 1 to 20 of 39 for “"shell element"”.
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Large deformation analysis of laminated composite structures by a continuum-based shell element with transverse deformation
In this work, a finite element formulation and associated computer program is developed for the transient large deformation analysis of laminated composite plate/shell structures. In order to satisfy the plate/shell surface traction boundary conditions and to have accurate stress description while …
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Formulation and Validation of a Nonlinear Shell Element for the Analysis of Reinforced Concrete and Masonry Structures
… the formulation and validation of a nonlinear shell element for the simulation of RC/RM structures. The proposed shell element enhances an existing formulation of a four-node Discrete Kirchhoff shell element through the inclusion of a corotational approach to account for geometric …
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A study of the dynamics of shells with boundary layers and a study of the MITC3 shell element
Shell structures are frequently used for their aesthetic appeal, and material efficiency. They can be found everywhere, in all sorts of contexts. For example, they can serve as roofs to encapsulate large areas (think Millennium Park in Chicago); as fuselage for an airplane; as the frame of a car; …
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Contributions to the anisotropic elasto-plastic analysis of shells
Shells are probably the most widely used structural component in engineering and also in nature due to their high efficiency and excellent performance when properly designed. On the other hand, they can be very sensitive to changes in geometries, thicknesses, applied loads and boundary conditions. …
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Development of the Velocity Transformation Function of Damped Flat Shell Finite Element for the Experimental Spatial Dynamics Modeling
… Vibrometer (SLDV). In ESDM process, a finite element formulation is used to construct a numerical model of a structure. A conventional finite element such as rod, beam, or plate element, can be used to construct the numerical model of a structure from its mid-plane. In this research, the …
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Geometrically nonlinear analysis of layered anisotropic plates and shells
A degenerated three-dimensional finite element based on the total Lagrangian, incremental, formulation of a three-dimensional layered anisotropic medium is developed, and its use in the geometrically nonlinear, static as well as dynamic, analysis of layered composite plates and shells is …
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Development and Applications of a Flat Triangular Element for Thin Laminated Shells
Finite element analysis of laminated shells using a three-noded flat triangular shell element is presented. The flat shell element is obtained by combining the Discrete Kirchhoff Theory (DKT) plate bending element and a membrane element similar to the Allman element, but derived from the Linear …
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A doubly-curved finite element analysis of thin arbitrary shell structures
… linear elastic static analysis of thin arbitrary shell structures by the use of the displacement approach finite element method. The various factors involved in selecting a shell finite element are discussed. A comprehensive formulation of a 27 degree of freedom, arbitrary, doubly-curved, …
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Modeling of sheet metal fracture for shell finite elements with component level validation
… a pressing issue. The industry has been using shell finite elements in design practice due to many practical advantages over solid elements. A constitutive assumption of the plane stress condition in shell elements, violated after the onset of localized necking, is responsible for an inaccurate …
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Preslab - micro-computer analysis and design of prestressed concrete slabs
… triangle are combined to provide an efficient "shell" element. These triangles are used for the finite element analysis of prestressed flat slabs. An efficient out-of-core solver for sets of linear simultaneous equations is presented. This solver was developed especially for micro-computers. …
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Seismic load-resisting capacity of plastered straw bale walls
… loading, using two techniques: a multi-layer shell element and an equivalent compression strut frame in SAP2000. The models assume homogeneity, and based on the results, areas for improvement and further research are suggested.
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Nonlinear probabilistic finite element modeling of composite shells
A probabilistic finite element analysis procedure for laminated composite shells has been developed. A total Lagrangian finite element formulation, employing a degenerated 3-D laminated composite shell element with the full Green-Lagrange strains and first-order shear deformable kinematics, forms …
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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 on an element …
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An incremental total Lagrangian formulation for general anisotropic shell-type structures
… equations of motion, the displacement finite element model is obtained, which is solved iteratively. From this displacement finite element model, four different elements, i.e. degenerated shell element, degenerated curved beam element, 3-D continuum element and solid-shell transition element, …
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Refined theories and Discontinuous Galerkin methods for the analysis of multilayered composite structures
… multilayered composite and sandwich plates and shells are widely used for military and civilian aircraft, aerospace vehicles, and naval and civil structures because of their high specific stiffness and strength and tailoring capabilities. Moreover, composite materials are increasingly adopted …
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Manufacture of Complex Geometry Component for Advanced Material Stiffness
… support from the committee chair.</p> <p>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 …
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Dynamic simulation of heart mitral valve with transversely isotropic material model
… two methods for simulating, in the finite element setting, the material behavior of heart mitral valve leaflet tissue. First, a mixed pressure-displacement formulation is used to implement the constitutive material behavior with general 3D elements. Second, a shell is formulated that …
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Towards optimal mixed finite elements for general shell structures
Optimal finite elements are available for many engineering applications, such as incompressible media, beam and plate bending problems. However, no existing general shell elements have been shown to satisfy the mathematical conditions of optimality in the analysis of shell structures. The objective …
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Analysis and design of composite curved frames
… computed only from three-dimensional finite element models, but the computational expense of these models is prohibitive. Therefore, approximate two-dimensional analysis methods are used here to predict interlaminar stresses in the curved corner regions between the web and flanges and at the …
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Multilevel, subdivision-based, thin shell finite elements: development and an application to red blood cell modeling
… improve the performance of the subdivision thin shell finite element for practical applications in engineering design and analysis. The contribution of this document is to provide a thorough investigation of thin shell simulation using the subdivision shell element, focusing on novel element …
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