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Fatigue modeling simulation results

The possible fatigue failure mechanisms of SWCNT in the composite were also reported (Ren et al., 2004). Possible failure modes mainly include three stages, that is, splitting of SWCNT bundles, kink formation, and subsequent failure in SWCNTs, and the fracture of SWCNT bundles. As shown in Fig. 9.12, for zigzag SWCNT, failure of defect-free tube and tubes with Stone-Wales defect of either A or B mode all resulted in brittle-like, flat fracture surface. A kinetic model for time-dependent fracture of CNTs is also reported (Satapathy et al., 2005). These simulation results are almost consistent with the observed fracture surfaces, which can be reproduced reasonably well, suggesting the possible mechanism should exist in CNT-polymer composites. [Pg.194]

Fig. 4.11 Corvette cradle modeling and simulation results from the internal state variable plasticity-damage model coupled with the multistage fatigue model demonstrating the capability to predict the experimental result for redesigning the cradle from aluminum to magnesium... Fig. 4.11 Corvette cradle modeling and simulation results from the internal state variable plasticity-damage model coupled with the multistage fatigue model demonstrating the capability to predict the experimental result for redesigning the cradle from aluminum to magnesium...

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