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  • Electronic Resource  (17)
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  • Electronic Resource  (17)
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 19 (1996), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper presents J-integral solutions for geometries with shallow edge cracks (0.05 ≤a/W≤ 0.1) subjected to combined tension and bending. Tension and bending is applied simultaneously and sequentially. Curves of J versus structural strain are obtained from two-dimensional plane strain finite element analyses using medium to low work hardening power laws to represent material behaviour. Empirical equations are derived from the finite element results to estimate the J-integrals, using previously developed J-estimation schemes for SENT and SENB specimens with only minor modifications. The predictions presented are invariably safe, but due to the complexity of the problems studied and the variability of the loadings considered, the degree of conservatism is found to be high in some cases.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Fatigue & fracture of engineering materials & structures 22 (1999), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Three-dimensional finite element models have been used to predict the J versus applied strain behaviour of shallow semi-elliptical surface cracks in wide steel plates. These models were loaded in pure bending up to fully plastic conditions that produced maximum strains remote from the crack of 10 times the yield strain. This study examined cracks with a crack depth to plate thickness ratio (a/t) in the range 0.05–0.15, and crack depth to crack half-length ratio (a/c) from 0.2 to 0.57, in elastic-hardening materials as well as those with a yield plateau before strain-hardening. The results were found to differ significantly from those obtained from plane strain analyses, and a J estimation scheme was developed from the three-dimensional results. Comparisons between the results obtained in this work and the J predictions provided by existing defect assessment methods show that the proposed equations are a significant improvement when large strains are likely.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International journal of fracture 22 (1983), S. 15-39 
    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 Les résultats d'éléments finis non linéaires résultant d'une consultation circulaire sont comparés avec des données empiriques et expérimentales obtenues pour trois types de géométrie: éprouvette compacte, éprouvette de flexion en trois points et panneau à fissure centrale soumis à une charge uniaxiale. Les paramètres de la solution qui doivent être comparés dans les différentes formes sont: la charge appliquée, le déplacement d'un extensiomètre, l'intégraleJ (sans réserve sur sa méthode de calcul), KI, les profils d'ouverture de fissure ainsi que le développement de la zone plastique.
    Notes: Abstract Non-linear finite element results from a round robin are compared with empirical and experimental data obtained for three types of geometries: compact specimen, three-point bend specimen and a center-cracked panel subject to uniaxial loading. The solution parameters to be compared in various forms are: applied load, clip gauge displacement, RiceJ-integral (with no limit placed on method of calculation),K 1 crack opening profiles and plastic zone development.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of fracture 13 (1977), S. 553-555 
    ISSN: 1573-2673
    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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  • 5
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 11 (1977), S. 393-395 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 14 (1979), S. 313-313 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 11 (1971), S. 375-377 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This technical note describes a simple method for using the nickel meshes with up to 2000 lines/in. (lpi) as masks for producing moiré grids. The main advantages, when compared with other methods, are the substantial increase in the speed of application and the precision of the reproduced grid.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 8 (1968), S. 210-216 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The basic principles and methods of the moiré method are well known. Here, some of the procedures and equipment developed by the authors for the production and reproduction of high-line-density grids for strain-measurement purposes are described.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 11 (1971), S. 375-377 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This technical note describes a simple method for using the nickel meshes with up to 2000 lines/in. (lpi) as masks for producing moiré grids. The main advantages, when compared with other methods, are the substantial increase in the speed of application and the precision of the reproduced grid.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 12 (1972), S. 216-222 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Two profile projectors have been modified for moiré applications by the addition of adjustable screens which contain magnified master grids. The instruments have been examined for any errors they may introduce into the measurements and the screen adjustments have been calibrated. Their use and application are described briefly.
    Type of Medium: Electronic Resource
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