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  • 1
    Publication Date: 1990-01-01
    Print ISSN: 0020-1154
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 2
    Publication Date: 1987-01-01
    Print ISSN: 0020-1154
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 3
    Publication Date: 1990-03-01
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 60 (1990), S. 358-366 
    ISSN: 1432-0681
    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: Übersicht Zur Lösung wird eine Versetzungsverteilung auf dem Umfang des Lochs eingeführt, wodurch das Problem auf eine singuläre Integralgleichung zurückgeführt wird. Bei Anwendung geeigneter numerischer Verfahren können genaue Spannungswerte an beliebigen Punkten der verbundenen Scheiben ermittelt werden. Als Anwendungsbeispiele werden die Fälle konstanter einachsiger Zugspannung als Fernfeld sowie von Innendruck im Loch für verschiedene Materialparameter betrachtet. Für eine Reihe geometrischer Parameter des Problems werden die Umfangsspannungen am Loch und die Spannungen in der Verbundfuge angegeben.
    Notes: Summary The problem is solved by the well established method of using a dislocation distribution on the perimeter of the hole to reduce it to a singular integral equation. Appropriate numerical techniques are applied and accurate evaluation of the stresses can be effected anywhere in the region of the bonded plates. As examples a constant uniaxial tension applied at infinity and an internal pressure within the hole are considered for selected material pairs. For these examples the stresses on the perimeter of the circular hole and on the interface are reported for a range of values for the geometric parameters of the problem.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 57 (1987), S. 3-15 
    ISSN: 1432-0681
    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: Übersicht Eine Methode wird dargestellt, welche zur Lösung von Problemen einer unendlichen elastischen Scheibe endlicher Breite mit Rissen und Löchern beliebiger Konfiguration und Geometrie geeignet ist. Die Lösung in Form von komplexen Spannungsfunktionen wurde mit Hilfe von Integralen über den Rissen und Löchern gegeben. Die Integranden wurden mit Hilfe von bekannten Funktionen (Green) und einer unbekannten Dichtefunktion ω(t) ausgedrückt, für welche eine singuläre Integralgleichung abgeleitet wurde. Die geeigneten Greenschen Funktionen wurden von der Lösung des Problems der entsprechenden Scheibe ohne Risse, welche mit einer Einzelkraft belastet wird oder eine Versetzung enthält, hergeleitet. Die singuläre Integralgleichung wurde numerisch für eine Scheibe endlicher Breite mit einem Kreisbogenriß im einachsigen Zugspannungsfeld gelöst.
    Notes: Summary A method is presented to deal with the problems of an elastic strip weakened by cracks and holes of any configuration and geometry. The solution in terms of complex potentials is given by integrals over the cracks and holes with integrands expressed in terms of determined functions (Green) and an unknown density function ω(t). A singular integral equation for the complex density function ω(t) is derived for the problem. The appropriate Green's functions are derived from the solution for the problem of an uncracked strip subjected to a concentrated force or a dislocation. The integral equation is solved numerically for a strip in tension with an internal circular arc crack.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The optical evaluation of the stress intensity factors from isopachic fringes is presented for a straight crack approaching the free boundary of a half-plate or the interface of two bonded plates. It is based on appropriate numerical approximation of the exact stress fields obtained by the method of singular integral equations. The proposed evaluation of the stress intensity factors is either by a numerical procedure or through the use of concise nomograms. Also, isopachic fringe patterns have been analytically constructed for a crack perpendicular to the interface and at various distances from it, to show the significant influence from the free boundary or the interface.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 26 (1988), S. 2115-2128 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Plane elasticity problems that can be reduced to singular integral equations over the unit circle are considered, the method of using a dislocation density function ω(σ) is adopted. First, the trapezoidal approximation is modified for the evaluation of the contour integral ∮ y [ω(σ)/(σ - z)]dσ at the complex field point z; extra correction terms for known singularities of ω(z) can easily be determined from the error expression. Based on the quadratures obtained, expressions for the accurate evaluation of the potentials are derived using their analyticity properties. The numerical techniques proposed are used for the solution of the problem of an infinite plate weakened by a circular hole and subjected to a dislocation.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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