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  • 1
    Electronic Resource
    Electronic Resource
    THE EFFECT OF MICROSTRUCTURE ON FRACTURE TOUGHNESS OF POLYCRYSTALLINE ALUMINA (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 19 (1996), 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: Abstract— A study of the dependence of the fracture toughness on the microstructural morphology of polycrystalline materials is presented. The microstructure of several aluminas was characterized by thermal etching and image analysis. The fracture toughness of these materials was then determined by bridge-indentation pre-cracking followed by a four-point bending test procedure. A SEM investigation of the mechanisms of crack propagation was also carried out. The observed microstructure-related fracture toughness responses are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.1996.tb00937.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fatigue crack paths in coarse-grained magnesium (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: This paper examines fatigue crack paths in coarse-grained magnesium alloys. Visualization of the microstructure by etching and continuous crack monitoring with a microscope provide evidence of the crack-grain interaction at different fatigue crack growth regimes. Near-threshold fatigue crack growth promotes the development of rough surfaces by the activation of single slip mechanisms and crack deflection. The R-ratio effect on near-threshold results is discussed in the light of the partial crack-closure model. The role of grain boundaries and grain-to-grain crack deflections on fatigue crack growth rates is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-2695.2004.00832.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Moire interferometric fringe patterns about crack tips: Experimental observations and numerical simulation
    Amsterdam : Elsevier
    Optics and Lasers in Engineering 12 (1990), S. 135-150 
    Details
    ISSN: 0143-8166
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics , Technology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0143-8166(90)90013-Y
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Displacement measurements around cracks in three-dimensional problems by a hybrid experimental technique (1983)
    Springer
    Experimental mechanics 23 (1983), S. 15-20 
    Details
    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 Diffraction gratings were applied to slices taken from three-dimensional stress-frozen models of bodies with cracks. The slices were then annealed to relax the reversible strains and moiré interferometry was used to determine the deformation of the slice. A virtual reference grating of 1200 ℓ/mm (30,000 ℓ/in.) was used to provide the required high sensitivity. The moiré pattern in the LEFM (linear-elastic fracture-mechanics) zone was photographed with 20 × magnification. Results were compared with those obtained photoelastically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02328676
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  • 5
    Electronic Resource
    Electronic Resource
    Experimental stress-intensity distributions in three-dimensional cracked-body problems (1983)
    Springer
    Experimental mechanics 23 (1983), S. 378-382 
    Details
    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 For over a decade, the first author and his associates have worked towards the development of an optical-experimental-modeling technique for predicting both the flaw shape and the stress-intensity-factor distribution in three-dimensional cracked-body problems where neither are knowna priori. The application is associated with subcritical flaw growth, the precursor to most service fractures. This paper presents an assessment of results obtained by applying the technique which consists of a marriage between frozen-stress photoelasticity and moiré analysis to measure the stress-intensity-factor distribution across a straight-front crack in a body of finite thickness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02330051
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    Paper (German National Licenses)
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