A Fatigue Crack Growth Model for Random Fiber Composites

Fatigue crack growth behavior of a randomly oriented short carbon fiber rein-forced polyether ether ketone (PEEK) composite is studied at four different load ratios. Based on the experimental data, a new fatigue crack growth model is proposed which accounts for crack growth throughout the entire fat...

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Bibliographic Details
Published in:Journal of composite materials 1997-01, Vol.31 (18), p.1838-1855
Main Authors: Atodaria, D. R., Putatunda, S. K., Mallick, P. K.
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Fracture mechanics (crack, fatigue, damage...)
Fracture mechanics, fatigue and cracks
Fundamental areas of phenomenology (including applications)
Physics
Polymer industry, paints, wood
Solid mechanics
Structural and continuum mechanics
Technology of polymers
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Summary:Fatigue crack growth behavior of a randomly oriented short carbon fiber rein-forced polyether ether ketone (PEEK) composite is studied at four different load ratios. Based on the experimental data, a new fatigue crack growth model is proposed which accounts for crack growth throughout the entire fatigue cycle and not just at the maximum load. The proposed model involves a weighted averaging procedure and is found to fit the fatigue crack growth rates at all load ratios in a single power law equation. Finally, it is observed that the fatigue threshold intensity of this material decreases with increasing load ratio.
ISSN:0021-9983
1530-793X
DOI:10.1177/002199839703101804