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  • 1
    Electronic Resource
    Electronic Resource
    Theoretical crack path prediction (2005)
    PO Box 1354, 9600 Garsington Road, Oxford OX4 2XG, UK. : Blackwell Science Ltd
    Fatigue & fracture of engineering materials & structures 28 (2005), S. 0 
    Details
    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: In many practical cases, the crack growth leads to abrupt failure of components and structures. For reasons of a reliable quantification of the endangerment due to sudden fracture of a component, therefore, it is of enormous importance to know the threshold values, the crack paths and the growth rates for the fatigue crack growth as well as the limiting values for the beginning of unstable crack growth (fracture toughness). This contribution deals with the complex problem of a—however initiated—crack, that is subjected to a mixed-mode loading. It will present the hypotheses and concepts, which describe the superposition of Mode I and Mode II (plane mixed mode) as well as the superposition of all three modes (Mode I, II and III) for spatial loading conditions. Those concepts admit a quantitative appraisal of such crack situations and a characterization of possible crack paths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.2004.00855.x
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  • 2
    Electronic Resource
    Electronic Resource
    Computational simulation and experimental findings of three-dimensional fatigue crack growth in a single-edge notched specimen under torsion loading (2005)
    PO Box 1354, 9600 Garsington Road, Oxford OX4 2XG, UK. : Blackwell Science Ltd
    Fatigue & fracture of engineering materials & structures 28 (2005), S. 0 
    Details
    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: In this paper, the rather complex three-dimensional (3D) fatigue crack growth behaviour in a single-edge notched (SEN) specimen with an inclined plane of the initial crack under torsion loading is investigated with the aid of ADAPCRACK3D programme and by application of a recently developed 3D fracture criterion. It will be shown that the computationally simulated results for fatigue crack growth in the FE model of the specimen are in good agreement with experimental findings for the development of spatially twisted and warped crack faces in the real laboratory test specimen. Consequently, also for this case with a rather complex 3D crack growth behaviour, the functionality of the ADAPCRACK3D programme and the validity of the proposed 3D fracture criterion can be stated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.2005.00864.x
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  • 3
    Electronic Resource
    Electronic Resource
    A new compact shear specimen (1981)
    Springer
    International journal of fracture 17 (1981), S. R105 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF00033347
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  • 4
    Electronic Resource
    Electronic Resource
    Investigations of interlaminar fracture toughness of laminated polymeric composites (1998)
    Springer
    Mechanics of composite materials 34 (1998), S. 223-234 
    Details
    ISSN: 1573-8922
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The behavior of interlaminar fracture of fiber reinforced laminated polymeric composites has been investigated in modes I, II, and different mixed mode I/II ratios. The experimental investigations were carried out by using conventional beam specimens and the compound version of the CTS (compact tension shear) specimen. In this study, a compound version of the CTS specimen is used for the first time to determine the interlaminar fracture toughness of composites. In order to verify the results obtained by the CTS tests, conventional beam tests were also carried out. In the beam tests, specimens of double cantilever beam (DCB) and end notched flexure (ENF) were used to obtain the critical rates of the energy release for failure modes I and II. The CTS specimen is used to obtain different mixed mode ratios, from pure mode I to pure mode II, by varying the loading conditions. The highest mixed mode ratio obtained in the experiment was G I /G II =60. The data obtained from these tests were analyzed by the finite element method. The separated critical rates G I and G II of the energy release were calculated by using the modified virtual crack closure integral (MVCCI) method. The experimental investigations were performed on a unidirectional glass/epoxy composite. The results obtained by the beam and CTS tests were compared. It was found that the interlaminar fracture toughness G IC init of mode I at crack initiation and the corresponding value G II Cinit of mode II obtained by the conventional beam and the CTS tests were in rather good agreement. The experimental results of interlaminar fracture of mixed mode were used to obtain the parameters required for the failure criterion. The two different failure criteria were compared. The best correlation with the experimental data was obtained by using the failure criterion proposed by Wu in 1967 containing linear and quadratic terms of the rates of the energy release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02256041
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  • 5
    Electronic Resource
    Electronic Resource
    The behaviour of cracks in elastic-plastic materials under plane normal and shear loadings (1993)
    Springer
    International journal of fracture 62 (1993), S. 43-54 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Cracks in structures are often subjected to complex loading conditions. The direction of the crack extension depends on the normal and the shear components of the load. This paper is based on the kinking behaviour of cracks taking elastic-plastic behaviour of materials into account. The J-integral and the mixed-mode components J I and J II were determined after having performed several finite element analyses for different loading conditions. The path independence of J, J I and J II is investigated for both, the line integral proposed by Rice and the volume integral proposed by deLorenzi. For correctly determined crack deflection angles the J II-component vanishes when a FE-model with a kinked crack is considered. Hence, cracks propagate perpendicularly to the local mode I load.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00032524
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  • 6
    Electronic Resource
    Electronic Resource
    Elastic-plastic crack analysis under mixed mode loading conditions (1992)
    Springer
    International journal of fracture 57 (1992), S. 249-252 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF00035076
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  • 7
    Electronic Resource
    Electronic Resource
    A loading device for the creation of mixed mode in fracture mechanics (1983)
    Springer
    International journal of fracture 22 (1983), S. R55 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF00942726
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  • 8
    Electronic Resource
    Electronic Resource
    On the applicability of the HRR theory to CTS specimens under mixed-mode loading conditions (1991)
    Springer
    International journal of fracture 47 (1991), S. R43 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF00042581
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  • 9
    Electronic Resource
    Electronic Resource
    Ermittlung des Spannungsintensitätsfaktors KI mit dem spannungsoptischen Verfahren (1980)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 11 (1980), S. 293-303 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Determination of Stress Intensity Factor KI by means of Photoelastic TechniqueA survey is given of the methods applied for determining stress intensity factor KI by means of photo-elasticity. In this connection the scope of validity and the accuracy of these methods are discussed.
    Notes: Es wird ein Überblick über die Methoden zur spannungsoptischen Ermittlung des Spannungsintensitätsfaktors KI gegeben. Hierbei werden Gültigkeitsbereich und Genauigkeit dieser Methoden diskutiert.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19800110808
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  • 10
    Electronic Resource
    Electronic Resource
    Eine Bruchmechanikprobe und Belastungsvorrichtung zur Bestimmung von Rißzähigkeiten bei überlagerter Normal- und Schubbeanspruchung (1981)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 12 (1981), S. 297-300 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: A fracture mechanics specimen and loading device for the determination of fracture toughness under superimposed normal and shear modes of loadingA simple as well as compact fracture mechanics specimen and a surprisingly uncomplicated loading device is suggested for the determination of fracture toughnesses under loading mode I, loading mode II and mixed loading mode. With this loading device the different loading modes can be applied to the specimen by means of a simple tensile test.
    Notes: Es wird eine Bruchmechanikprobe und eine Belastungsvorrichtung zur Bestimmung von Rißzähigkeiten bei Belastungsart I, Belastungsart II sowie gemischter Belastungsart vorgeschlagen. Mit der unkomplizierten Belastungsvorrichtung können mittels Zugversuch die verschiedenen Belastungsarten in der einfachen und kompakten Probe erzeugt werden.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19810120808
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