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- Title
Fatigue and Fracture Reliability of Shell-Mimetic PE/TiO<sub>2</sub> Nanolayered Composites.
- Authors
Yang, Y. J.; Zhang, B.; Tan, H. F.; Luo, X. M.; Zhang, G. P.
- Abstract
Shell-mimetic (PE/TiO2)4 nanolayered composites stacked alternatively by 20 nm-thick PE layers and 55 nm-thick nanocrystalline TiO2 layers are synthesized by a combination of the layer-by-layer self-assembly and the chemical bath deposition methods. The critical cracking strain and the apparent fracture energy of the bio-mimetic nanolayered composites are determined as 0.56% and 0.98 J m−2, respectively, by the simply supported beam bending testing. Fatigue properties of the (PE/TiO2)4 nanolayered composites are evaluated by the dynamic bending testing method. The critical fatigue strain amplitude corresponding to the lowest strain amplitude for fatigue cracking of the present (PE/TiO2)4 NLCs is 0.0853%, which is much lower than the critical cracking strain (0.56%) under monotonic bending. The finding indicates that the potential fatigue threat to the long-term reliability of the bio-mimetic nanolayered composites needs to be concerned.
- Subjects
TITANIUM oxides; MOLECULAR self-assembly; COMBINATION reactions (Chemistry)
- Publication
Advanced Engineering Materials, 2017, Vol 19, Issue 8, pn/a
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201700246