Crack growth characteristics of carbon nanotube-based polymer composites subjected to cyclic loading |
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Authors: | Yu Kuronuma Yasuhide Shindo Tomo Takeda Fumio Narita |
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Affiliation: | Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai 980-8579, Japan |
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Abstract: | This paper presents the characterization of crack growth in carbon nanotube (CNT)-based polymer composites under fatigue loading. Fatigue crack growth tests were performed on single-edge cracked plate specimens of CNT/polycarbonate composites at room temperature and liquid nitrogen temperature (77 K). An elastic–plastic finite element analysis was also conducted to determine the J-integral range. The crack growth rate data were expressed in terms of the J-integral range, and the effect of nanotube addition on the fatigue crack growth behavior was examined. In addition, possible mechanisms of the crack growth in the nanocomposites are discussed based on microscopic observations of the specimen fracture surfaces. |
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Keywords: | Composites Cyclic or delta J Finite element analysis Fracture mechanics Fatigue crack growth |
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