Journal
ENGINEERING FRACTURE MECHANICS
Volume 93, Issue -, Pages 1-12Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2012.04.022
Keywords
Ultra-high toughness cementitious composites; Fatigue crack propagation law; J-integral; Fatigue life prediction
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Funding
- National Natural Science Foundation of China [51008270]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20100101120058]
- Key Science and Technology Innovation Team of Zhejiang Province of China [2010R50034]
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Based on Paris law and nonlinear fracture mechanics, a fatigue crack propagation equation of ultra-high toughness cementitious composites, which is a strain-hardening material, was proposed in this paper, with the two parameters as crack covering area and fatigue amplitude off-integral. This law was verified by a three-point bending experiment on the single notched beam. The results showed that, the fatigue crack propagation rate of this material sped up with the increase of the maximum fatigue load, as well as the amplitude: furthermore, the fatigue life of the stable developing stage could be estimated with the monitored crack covering area and the regressed parameters. (C) 2012 Elsevier Ltd. All rights reserved.
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