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  • 1995-1999  (3)
  • 1990-1994  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Dynamic fracture analysis by moiré interferometry (1991)
    Springer
    Experimental mechanics 31 (1991), S. 306-309 
    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 Dynamic moiré interferometry was used to measure separately theu- andv-displacement fields surrouding a rapidly propagating crack tip in Homalite-100 and 7075-T6 aluminum-alloy plates. These transient crack-tip-displacement data were then used to compute the dynamic stress-intensity factor and the remote stress component.J-integral values were also estimated using the static approximate procedure of Kanget al. This static analysis provided the correctJ when the contour integral was taken within 3 mm of the crack tip.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02325986
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A biaxial test specimen for crack arrest studies (1996)
    Springer
    Experimental mechanics 36 (1996), S. 277-283 
    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 A biaxially loaded, single edge notched (SEN) fracture specimen, with mixed modes I and II loading, was used to study the crack arrest capability of a bonded and riveted tear strap without and with simulated multiple site damage (MSD). MSD was modeled by a 50-percent groove without which the running crack would inevitably kink due to KII loading. A total of thirty-one 2024-T3 aluminum specimens with various crack and MSD configurations were tested. The fracture parameters associated with straight and curved crack paths were determined by using the experimenta results to drive a dynamic finite element model of the specimen in its generation mode. The crack kinking and extension criteria were verified by the excellent agreement between the prediction based on these fracture parameters and the measured crack kinking angles. Comparison between the test results generated by the biaxial stress specimens and by those generated by small- and full-scale pressurized fuselage rupture experiments showed that this specimen can be used to prescreen the effectiveness of tear straps and crack arrestors in an airplane fuselage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02318019
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Axial crack propagation and arrest in a pressurized cylinder: An experimental-numerical analysis (1999)
    Springer
    Experimental mechanics 39 (1999), S. 256-264 
    Details
    ISSN: 1741-2765
    Keywords: Dynamic fracture ; crack kinking ; crack arrest ; fuselage rupture ; tear strap
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The feasibility of using a previously developed crack-kinking criterion to predict crack arrest at a tear strap in a pressurized fuselage was studied with instrumented axial rupture tests of 21 models of an idealized fuselage. A rapidly propagating axial crack, which was initiated from a precrack, kinked immediately upon extension and propagated diagonally until it turned circumferentially and propagated along the tear straps. An elastodynamic finite element analysis of the rupturing model fuselage yielded the mixed-mode stress intensity factors,K I andK II , and the remote stress component, σ OX . This numerical procedure was also used to predict the crack trajectories in full-scale fuselage rupture tests. All numerical results agreed well with their measured counterparts regardless of size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02329802
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Energy-dissipation mechanisms associated with rapid fracture of concrete (1993)
    Springer
    Experimental mechanics 33 (1993), S. 205-211 
    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 A hybrid experimental-numerical procedure, involving moiré interferometry and dynamic finite-element analysis, was used to analyze rapid crack growth in an impact loaded three-point-bend concrete specimen with an offset straight precrack. The dissipated energy rates in the fracture process zone (FPZ), which trails the rapidly extending crack, and in the frontal FPZ ahead of the crack tip, the kinetic-energy rate and energy-release rate were computed. The results showed that while the trailing FPZ was the dominant energy dissipation mechanism, much of the released energy was converted to kinetic energy in the fracturing concrete specimen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02322574
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A bar impact tester for dynamic fracture testing of ceramics and ceramic composites (1992)
    Springer
    Experimental mechanics 32 (1992), S. 109-116 
    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 A bar impact test was developed to study the dynamic fracture responses of precracked ceramic bars, Al2O3 and 15/29-percent volume SiCw/Al2O3. Crack-opening displacement was measured with a laser-interferometric displacement gage and was used to determine the crack velocity and the dynamic stress-intensity factorK I dyn . The crack velocity andK I dyn increased with increasing impact velocity while the dynamic-initiation fracture toughness,K Id, did not vary consistently with increasing impact velocities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02324721
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Process zone of polycrystalline alumina (1999)
    Springer
    Experimental mechanics 39 (1999), S. 20-24 
    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 The fracture process zone of two polycrystalline alumina fracture specimens were analyzed by a hybrid experimental-numerical procedure involving a phase-shifting moiré interferometry and a finite element analysis. The dissipated energy, which was obtained through numerical analysis, in the fracture process zone was found to be the major energy dissipation mechanism in the brittle alumina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02329296
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    Paper (German National Licenses)
    Fulltext
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