Thermoplastic polymers have imposed thernselves as versatiie, performing and economic materials in the automotive industry. The flexural fatigue resistance of a continuous fiber cornposite (CFC) of glass and polypropylene (PP) under a fabric form has been investigated. Stress-life curves at a temperature of -40 deg C, 23 deg C and 50 deg C were obtained. These S-N curves show that the very high fatigue resistance of the PP/CFC composite at 23 deg C, in terms of normalized maximum flexural stress in fatigue (with respect to the flexural strength), remains relatively high at a testing temperature of 50 deg C. These curves also show that the fatigue resistance is actually improved at -40 deg C, i.e. at a temperature below than the glass transition temperature of the PP matrix. Comparison with a thermoset composite of similar flexural strength indicates that the intrinsic toughness and ductility of the thermoplastic PP matrix provides improved fatigue resistance, especially below the glass transition temperature.
Fatigue - temperature resistance of continuous glass fiber/polypropylene composites
Ermüdungs- und Temperaturbeständigkeit von Endlosglasfaser/Polypropylen-Verbundwerkstoffen
2002
5 Seiten, 4 Bilder, 1 Tabelle, 5 Quellen
Conference paper
English
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