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  • 1
    Electronic Resource
    Electronic Resource
    Polymer Fatigue (1984)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Materials Research 14 (1984), S. 171-204 
    Details
    ISSN: 0084-6600
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ms.14.080184.001131
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Surface composition of cobalt-nickel alloys determined by an improved calibration method for AES
    Amsterdam : Elsevier
    Journal of Electron Spectroscopy and Related Phenomena 32 (1983), S. 277-282 
    Details
    ISSN: 0368-2048
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0368-2048(83)85008-7
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ovarian thecoma with ascites and high serum levels of CA125 (2000)
    Springer
    Archives of gynecology and obstetrics 264 (2000), S. 42-44 
    Details
    ISSN: 1432-0711
    Keywords: Key words Thecoma ; Ascites ; CA125 ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report a 34-year-old woman with an ovarian thecoma and ascites who exhibited high serum levels of CA125. Measuring serum tumor markers and imaging are two important diagnostic tools for malignant ovarian tumors. In the present case, a preoperative diagnosis of benign ovarian tumor could not be made due to the elevation of CA125 (895 U/ml) and nonspecific MRI findings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00007485
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Fatigue-crack advance mechanisms in polymers (1984)
    Springer
    Journal of materials science 19 (1984), S. 385-395 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The room-temperature fatigue-crack propagation behaviour of poly(butylene terephthalate) is strongly influenced by hysteretic heating near the crack tip since the glass transition temperature is just above room temperature. At low frequencies or stress intensities, the crack tip damage zone consists of several layers of crazes. At high frequencies or stress intensities, hysteretic heating causes a drop in yield stress and a large increase in the depth of the crack tip damage layer. At the same time, the increase in the plane stress plastic zones near the free surfaces produces large shear lips which flank the interior craze zone. This transformation results in a crack growth rate transition which appears as a crack deceleration followed by rapid crack acceleration. This thermal transition can be suppressed or delayed by immersion in water or silicone oil to reduce heat build-up in the sample during testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02403224
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  • 5
    Electronic Resource
    Electronic Resource
    Biaxial impact fatigue of polycarbonate (1982)
    Springer
    Journal of materials science 17 (1982), S. 164-176 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An impact fatigue test has been designed for studying the repeated biaxial impact load response of polymers. In the test geometry, a thin plate-like sample is rigidly held by an annular clamp and is repeatedly impacted by a hemispherically-tipped plunger. Results have been obtained for polycarbonate. Under impact fatigue, cracks initiate on the bottom surface where high biaxial tensile stresses exist. These cracks propagate along radial lines on the sample surface and also into the sample normal to the surface. The load-bearing capability and the residual impact strength decrease as the cracks propagate. The development of impact fatigue cracks, the lifetime behaviour and the change in mechanical properties after partial impact fatigue are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809048
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Fatigue-crack advance mechanisms in polymers (1984)
    Springer
    Journal of materials science 19 (1984), S. 385-395 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The room-temperature fatigue-crack propagation behaviour of poly(butylene terephthalate) is strongly influenced by hysteretic heating near the crack tip since the glass transition temperature is just above room temperature. At low frequencies or stress intensities, the crack tip damage zone consists of several layers of crazes. At high frequencies or stress intensities, hysteretic heating causes a drop in yield stress and a large increase in the depth of the crack tip damage layer. At the same time, the increase in the plane stress plastic zones near the free surfaces produces large shear lips which flank the interior craze zone. This transformation results in a crack growth rate transition which appears as a crack deceleration followed by rapid crack acceleration. This thermal transition can be suppressed or delayed by immersion in water or silicone oil to reduce heat build-up in the sample during testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553561
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Discontinuous fatigue crack growth in polycarbonate (1981)
    Springer
    Journal of materials science 16 (1981), S. 1108-1110 
    Details
    ISSN: 1573-4803
    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/BF00542759
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  • 8
    Electronic Resource
    Electronic Resource
    On a fatigue crack-front marking technique for polymers (1982)
    Springer
    Journal of materials science 17 (1982), S. 2547-2552 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A fatigue crack-front marking technique using small tensile overloads is described. In this technique, two small overloads are chosen to produce distinct striation spacings which can be used to encode a binary marker on the fatigue fracture surface. Post-mortem detection of these binary coded markers then enables a direct correlation with the load history. This technique is particularly useful for the study of early crack development or crack initiation in smooth bar samples. Periodic insertion of binary coded markers during the entire testing period could allow a precise determination of the crack initiation time. The study of fatigue fracture mode transitions is also facilitated with this crack-front marking technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00543886
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Shear and craze development in the fatigue of ductile amorphous polymers (1985)
    Springer
    Journal of materials science 20 (1985), S. 873-880 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The competitive interplay between shear and craze deformation in the fatigue of ductile amorphous polymers leads to the formation of intricate fatigue crack shapes and stable crack growth. The craze/shear dual deformation mode is expressed in a unique crack tip plastic zone, which has been observed in polycarbonate, polysulfone, a polyarylate block copolymer and a polyestercarbonate copolymer. The fatigue crack growth resistance in these polymers is high, and factors which affect the relative ease of shear flow and crazing are expected to affect their fatigue endurance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00585729
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  • 10
    Electronic Resource
    Electronic Resource
    Fatigue crack advance mechanisms in polymers: rubber toughening mechanisms in blends of poly(2,6-dimethyl -1,4-phenylene oxide) and polystyrene (1983)
    Springer
    Journal of materials science 18 (1983), S. 1836-1844 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The fatigue crack propagation behaviour of rubber toughened blends of poly(2,6-dimethyl-1,4-phenylene oxide) (PXE) and polystyrene (PS) were studied. The nature of the fatigue crack tip damage zone development and the subsequent crack tip advance mechanism through this damage zone were also examined. In the control blend with no rubber particles, several long crazes preceded the crack tip and provided an easy path for crack propagation. The addition of rubber particles, however, led to massive microcrazing over a considerably enlarged zone about the crack tip. This proved to be an effective energy dissipation mechanism which resulted in reduced fatigue crack growth rates. When PS was substituted for PXE in the polymer matrix, although microcrazing still occurred over an enlarged crack tip damage zone, many of the microcrazes grew to macroscopic size, thus reducing the fatigue toughness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00542080
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