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Article Dans Une Revue Composites Science and Technology Année : 2010

Carbon Nanofibers enhance the Fracture toughness and Fatigue Performance of a Structural Epoxy system

Résumé

This study investigates the monotonic and dynamic fracture characteristics of a discontinuous fiber reinforced polymer matrix. Specifically, small amounts (0-1 wt%) of a helical-ribbon carbon nanofiber (CNF) were added to an amine cured epoxy system. The resulting nanocomposites were tested to failure in two modes of testing; Mode I fracture toughness and constant amplitude of stress tension-tension fatigue. Fracture toughness testing revealed that adding 0.5 and 1.0 wt% CNFsto the epoxy matrix enhanced the resistance to fracture by 66 and 78%, respectively. Fatigue testing at 20 MPa peak stress showed a median increase in fatigue life of 180 and 365% over the control by the addition of 0.5 and 1.0 wt% CNF, respectively. These results clearly demonstrate the addition of small weight fractions of CNFs to significantly enhance the monotonic fracture behavior and long-term fatigue performance of this polymer. A discussion is presented linking the two behaviors indicating their interdependence and reliance upon the stress intensity factor, .
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Dates et versions

hal-00702320 , version 1 (30-05-2012)

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Daniel R. Bortz, César Merino, Ignacio Martin-Gullon. Carbon Nanofibers enhance the Fracture toughness and Fatigue Performance of a Structural Epoxy system. Composites Science and Technology, 2010, 71 (1), pp.31. ⟨10.1016/j.compscitech.2010.09.015⟩. ⟨hal-00702320⟩

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