Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 24, Issue 2-4, Pages 99-108Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0142-1123(01)00064-0
Keywords
mode II interlaminar fatigue crack propagation; continuous glass fiber composite; polypropylene
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The mode II interlaminar fatigue crack propagation behavior of unidirectional continuous glass fiber (GF) composites with a polypropylene (PP) matrix obtained under three different molding conditions has been studied with the use of the end-notch flexure (ENF) geometry. The microstructure and mechanical performance, especially the interlaminar fatigue crack propagation, are strongly affected by the molding conditions. Comparative results reveal a major influence of the fiber-matrix interface and the matrix morphology on the crack propagation resistance. The distribution of the ductile amorphous PP phase in the semi-crystalline PP matrix appears to be the controlling parameter determining the fatigue crack propagation resistance of the PP/GF composite. Fractographic observations clearly showed the role of this phase. (C) 2002 Published by Elsevier Science Ltd.
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