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New Insights into Fatigue Crack Growth in Graphene‐Filled Natural Rubber Composites by Microfocus Hard‐X‐Ray Beamline Radiation
Author(s) -
Yan Ning,
Xia Hesheng,
Zhan Yanhu,
Fei Guoxia
Publication year - 2013
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201200044
Subject(s) - materials science , composite material , paris' law , natural rubber , crystallization , crack closure , exfoliation joint , composite number , graphene , beamline , fracture mechanics , structural engineering , beam (structure) , chemistry , organic chemistry , engineering , nanotechnology
Natural rubber (NR) composites containing graphene (GE) are prepared by ultrasound‐assisted latex mixing and in situ reduction. The fatigue crack propagation of the composite is examined. It is observed that GE has an opposite effect on crack growth resistance of NR, i.e., at lower fatigue strains, the inclusion of GE accelerates the crack growth, whereas at higher strains, the crack growth is retarded. It is suggested that the reason for this behavior is a competition between strain‐induced crystallization and cavitation at crack tip. Through microfocus hard‐X‐ray diffraction beamline with high spatial resolution, fatigue crack resistance is correlated to strain‐induced crystallization and new insights into the mechanism of fatigue crack growth are obtained.