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  • 1995-1999  (2)
  • Polymer and Materials Science  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 28 (1997), S. 465-474 
    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: Characterisation of the delamination behaviour of thermoplastic UD-composites made by different hybrid yarn structuresIn order to determine delamination behaviour of glass-fibre-reinforced polyamid composites the compression shear test and the DCB (Double Cantilever Beam)-, SEN- and NBT-test for mode-I- and the ENF (End Notched Flexure)-test for mode II-loading were used.By these tests the energy release rate G respectively K and the R cure (crack resistance curve) have been measured which characterise the crack resistance of the material against delamination.The composites were made by different hybrid yarn structures produced by air texturing (commingled yarn: COM), side-by-side arrangement (SBS), friction spinning (FS), Kemafil (KEM)- and Schappe(SCH)-technology. The influence of different glass fibre sizings was investigated.The results demonstrate the significant influence of different hybrid yarn structures and glass fibre coatings on fracture thoughness during crack propagation along the fibre/matrix interface. The best values were obtained for composites produced on the basis of commingled yarn structure.
    Notes: Zur Charakterisierung der Widerstandsfähigkeit gegen Delamination und Rißfortschritt wurde an thermoplastischen UD-Verbunden, die aus unterschiedlichen Hybridgarnstrukturen hergestellt worden sind, die Druckscherfestigkeit sowie interlaminare Bruch-zähigkeit mittels „Double Cantilever Beam“-Test (DCB), „Single Edge Notched“-Test (SEN) und „Notched Bending“-Test (NBT) für Mode I-Belastung und dem „End Notched Flexure“-Test (ENF) für Mode II-Belastung untersucht. Die Hybridgarnstrukturen unterscheiden sich ihrer Herstellugstechnologie entsprechend in der Anordnung der Verstärkungs-und thermoplastischen Matrixfilamente im Garn. In die Untersuchungen einbezogen wurden außerdem Verbunde mit unterschiedlicher Grenzschichtgestaltung. Ermittelt wurden die kritischen Energiefreisetzungstraten Gc bzw. die kritischen Spannungsintensitätsfaktoren Kc und für Mode I-Belastung die entsprechenden Rißausbreitungskurven, die die interlaminare Rißausbreitung charakterisieren. Die besten Ergebnisse wurden mit der lufttexturierten Hybridgarnstruktur erreicht.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 67 (1995), S. 1131-1132 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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