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Showing 1 to 20 of 32 for “"triangular elements"”.
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Topology optimization with simultaneous analysis and design
… is obtained by using 3 noded constant stress triangular elements. A chess board pattern is observed in the optimal topologies which may be attributed to the triangular elements. Some suggestions for future research are made.
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Optimization Of An Unstructured Finite Element Mesh For Tide And Storm Surge Modeling Applications In The Western North Atlantic Ocean
… employs 332,582 computational nodes and 647,018 triangular elements to provide approximately 1.0 to 25 km node spacing. In the previous work, the 333K mesh was applied in a Localized Truncation Error Analysis (LTEA) to produce nodal density requirements for the WNAT model domain. The goal of the …
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Análise dinâmica linear por superposição modal de cascas finas arbitrárias pelo Método dos Elementos Finitos
… thin shells by the Finite Element Method. Plane triangular elements with eighteen degrees of freedom each are used. The general equations of movement are obtained from the Hamilton Principle and solved by the Modal Superposition Method. The presence of a viscous type damping can be considered by …
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Uma estratégia adaptativa para problemas de contato em elasticidade
… used for the construction of the initial mesh of triangular elements. The contact problem is then solved using a sequence of sub-problems P1,P2,P1,P2,... where P1 is the corresponding frictionless problem with given tangential forces along the contact area and P2 is the associated Duvaut-Lions …
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The Method of Constructal Design in Heat Exchangers
… are considered, squared and equilateral triangular. The results show that the two objectives are best met when the solid wall thickness is uniform, i.e., when the wetted perimeters are square and triangular, respectively. Arrays of square elements and triangular elements are also …
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Estudo comparativo de análise numérica aplicada a placas esconsas
… Technology. There have been used non conforming triangular elements, with three nodal points and nine nodal displacements. The method of finite differences has showed better results and in both methods the convergence decreases along with the increase of the skew angle.
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Crack propagation in isotropic materials
… The finite element method using constant strain triangular elements was used. The experimental investigation is based on Gurney and Hunt's quasi-static method of fracture testing.<br/><br/>The applicability of the finite element method of analysis to problems of fracture mechanics is demonstrated …
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The Appliaction of the Finite Element Method to Fracture Mechanics Problems
… two straight and two circular boundaries. A 'triangular' crack-tip element based on assumed simple displacement functions is also presented. This element has two of its boundaries straight, meeting at the tip of the crack, and the other circular.<br/><br/>When employed in the singular region …
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Simulação da construção e do primeiro enchimento do reservatório de barragens zonadas de terra e enrocamento pelo método dos elementos finitos
… Method, using quadrilateral isoparametric elements with eight nodal points and triangular elements with six nodal points is applied to the static bidimensional analysis of Zoned Earth and Rock-fill Dams. The main objetive of this dissertation consists in the analysis of the behavior of …
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Locking-free discontinuous Galerkin methods for problems in elasticity, using linear and multilinear approximations
… well established as locking-free for lowo-rder triangular elements, and thus an effective alternative to the Standard Galerkin method for nearly incompressible materials, substantial numerical evidence in this work shows that this is not the case for quadrilateral elements. Direct comparisons to …
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A vortex panel method for potential flows with applications to dynamics and controls
… The surface is modeled as a collection of triangular elements on which the vorticity vector is piecewise linearly varying. The wake emanates from the sides and trailing edges of the thin lilting surfaces and is modeled as a progressively formed collection of vortex filaments. This model …
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An analytical model of strength loss in filament wound spherical vessels
… the mesh generating program to ensure that the elements generated did not cross , layer boundaries. The elements used were four noded isoparametric quadrilateral elements and these were collapsed to triangular elements for transitions. The input to the finite element program was prepared by an …
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Análise elasto-plástica da construção de aterros
… uses both quadratic isoparametric quadrilateral elements and triangular elements with six nodes. The stresses and strains are computed at the integration points of each element. In the elastic nonlinear analysis the formula proposed by Duncan and Chang (1970) is used and for the Poisson's ratio …
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Explicit stiffness matrices for triangular, plate bending finite elements
… are available for rectangular plate bending elements, rectangular plane stress and plane strain elements and triangular plane stress and plane strain elements. Triangular plate bending elements can at present only be formed by using a numeric algorithm. The explicit version of a stiffness …
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Generalized spatial discretization techniques for space-marching algorithms
… a generalized indexing strategy utilizing triangular elements in the two dimensions normal to the streamwise direction, while maintaining structure within the streamwise direction. The second discretization subdivides the domain into a collection of computational blocks. Each block has …
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On triangular finite elements for general shell structures
In general, triangular elements are most efficient to discretize arbitrary shell geometries. However, in shell finite element analysis, usually quadrilateral elements are used due to their better performance. Indeed, there does not exist yet a "uniformly optimal" triangular shell element. The work …
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The Fracture Toughness of Fibre Concretes
… work has been carried cut using constant strain triangular elements.<br/><br/>Three new fracture toughness tests are proposed. Two of these tests are based on the traditional standard concrete quality control specimens. The tests are relatively easy to apply requiring a minimum of specimen …
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Stabilized Finite Element Formulations for Flow Problems
… the classical Galerkin method for mixed finite elements, monolithic methods for nonlinear problems require consistent linearization. One of the main contributions of the work is a consistent linearization of a variational multiscale formulation for incompressible Navier-Stokes. We compare the …
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Two-dimensional Euler computations on a triangular mesh using an upwind, finite-volume scheme
… solution of the Euler equations on unstructured, triangular meshes using a flux-difference split, upwind method. The procedure uses a dual mesh system to implement the finite-volume scheme using conserved variables stored at the vertices of the triangles. The vertices of the triangles are located …
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High resolution algorithms for the Navier Stokes equations for generalized descretizations
… Results for two dimensional quadrilateral and triangular elements and three dimensional tetrahedral elements will be provided. Fundamental to the solution algorithm is a technique for generating multidimensional polynomials which model the spatial variation of the flow variables. Cell averaged …
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