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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Computational mechanics 1 (1986), S. 1-1 
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Computational mechanics 14 (1994), S. 385-386 
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Computational mechanics 2 (1987), S. 245-245 
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 3124-3127 
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper presents the simple method to determine the complex stress intensity factor ofinterface crack problem by the finite element method. The proportional method is extended to theinterface crack problem. In the present method, the stress values at the crack tip calculated by FEMare used and the stress intensity factors of interface crack are evaluated from the ratio of stress valuesbetween a given and a reference problems. A single interface crack in an infinite bi-material platesubjected to tension and shear is selected as the reference problem in this study. The accuracy of thepresent analysis is discussed through the results obtained by other methods. As the result, it isconfirmed that the present method is useful for analyzing the interface crack problem
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International journal of fracture 11 (1975), S. 257-271 
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Résumé Le mémoire a trait à une procédure pour le calcul des facteurs d'intensité des contraintes élastiques dans le cas de fissures de formes arbitraires soumises à état plan de tension ou de déformation. Un modèle de déplacements hypothétiques à éléments finis hybrides est utilisé, dans lequel les inconnues dans le système final d'équations algébriques sont les déplacements nodaux et les facteurs d'intensité des contraintes. Des éléments spéciaux, comportant leurs propres déplacements et champs de contraintes singuliers, sont utilisés dans une région déterminée voisine de l'extrémité de la fissure; la compatibilité de déplacement entre les éléments est satisfaite en recourant à la technique de multiplication d'un Lagrangien. Des exemples numériques sont présentés, notamment: fissures centrales ou de bord dans des tôles soumises à tension, fissure en quart de cercle dans une tôle tendue. D'excellentes corrélations ont été établies avec les solutions disponibles pour chaque cas traité. On procède également à une discussion sur la convergence de la solution proposée.
    Abstract: Zusammenfassung Dieser Bericht behandelt ein Verfahren zur Rechnung der elastischen Spannungsintensitatsfaktoren von Rissen beliebiger Form in ebenen Spannungs- und ebenen Verformungsproblemen. Man benützt ein festgelegtes Verschiebungsmodell hybrider endlicher Elementen indem die Unbekannten im Endgleichungssystem die Knotenverschiebungen und die elastischen Spannungsintensitätsfaktoren sind. Besondere Elemente, die eigene singuläre Verschiebungen und Spannungsfelder enthalten, werden in einem festgelegten Gebiet an der Rißspitze benützt, und die Komptabilität der Verschiebungen zwischen Elementen werden durch ein Multiplikationsverfahren von Lagrange erfüllt. Die angegebene Rechenbeispiele enthalten: Mittel- sowohl als Randrisse in Platten unter Zugspannung, und ein Viertelkreisriß in einer Platte unter Zugspannung. Ausgezeichnete Korrelation ergab sich mit allen zur Verfügung stehenden Lösungen in allen Fällen. Die Konvergenz der angegebenen Lösung wird auch besprochen.
    Notes: Abstract This paper deals with a procedure to calculate the elastic stress intensity factors for arbitrary-shaped cracks in plane stress and plane strain problems. An assumed displacement hybrid finite element model is employed wherein the unknowns in the final algebraic system of equations are the nodal displacements and the elastic stress intensity factors. Special elements, which contain proper singular displacement and stress fields, are used in a fixed region near the crack tip; and the interelement displacement compatibility is satisfied through the use of a Lagrangean multiplier technique. Numerical examples presented include: central as well as edge cracks in tension plates and a quarter-circular crack in a tension plate. Excellent correlations were obtained with available solutions in all the cases. A discussion on the convergence of the present solution is also included.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0271-2091
    Keywords: Mixed Method ; Assumed Deviatoric Stress ; Galerkin Formulation ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A formulation of a mixed finite element method for the analysis of unsteady, convective, incompressible viscous flow is presented in which: (i) the deviatoric-stress, pressure, and velocity are discretized in each element, (ii) the deviatoric stress and pressure are subject to the constraint of the homogeneous momentum balance condition in each element, a priori, (iii) the convective acceleration is treated by the conventional Galerkin approach, (iv) the finite element system of equations involves only the constant term of the pressure field (which can otherwise be an arbitrary polynomial) in each element, in addition to the nodal velocities, and (v) all integrations are performed by the necessary order quadrature rules. A fundamental analysis of the stability of the numerical scheme is presented. The method is easily applicable to 3-dimensional problems. However, solutions to several problems of 2-dimensional Navier-Stokes' flow, and their comparisons with available solutions in terms of accuracy and efficiency, are discussed in detail in Part II of this paper.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 4 (1984), S. 43-69 
    ISSN: 0271-2091
    Keywords: Mixed Method ; Assumed Deviatoric Stress ; Galerkin Formulation ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In Part I of this paper we presented a mixed finite element method, for solving unsteady, incompressible, convective flows, based on assumed ‘deviatoric stress-velocity-pressure’ fields in each element, which have the features: (i) the convective term is treated by the usual Galerkin technique; (ii) the unknowns in the global system of finite element equations are the nodal velocities, and the ‘constant term’ in the arbitrary pressure field over each element; and (iii) exact integrations are performed over each element.In this paper we present numerical studies, both for steady as well as unsteady cases, of the problems: (a) the driven cavity, (b) Jeffry-Hamel flow in a channel, (c) flow over a ‘backward’ or ‘downstream’ facing step, and (d) flow over a square step. All these problems are two-dimensional in nature, although certain 3-D solutions are to be presented in a separate paper. The present results are compared with those which are available in the literature and are based on alternative approaches to treat incompressibility and convective acceleration. The possible merits of the present method are thus pointed out.
    Additional Material: 52 Ill.
    Type of Medium: Electronic Resource
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