000015406 001__ 15406
000015406 005__ 20161115100220.0
000015406 04107 $$aeng
000015406 046__ $$k2016-08-21
000015406 100__ $$aZhu, Yong
000015406 24500 $$aGiant Anelasticity and Energy Dissipation in Single-Crystalline Nanowires (INVITED)

000015406 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015406 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015406 506__ $$arestricted
000015406 520__ $$2eng$$aAnelastic materials exhibit gradual full recovery of deformation once a load is removed. At macroscopic scale, however, anelaticity is usually very small or negligible. Here we show that single-crystalline ZnO can exhibit anelastic behaviour that is up to four orders of magnitude larger than the largest anelasticity observed in bulk materials, with a time-scale in the order of minutes. In—situ SEM tests of individual NWs showed that, upon removal of the bending load and instantaneous recovery of the elastic strain, a substantial portion of the total strain gradually recovers with time. We attribute the observed large anelasticity to stress-gradient-induced migration of point defects, as supported by electron energy loss spectroscopy (EELS) measurements, analytical modeling and also by the fact that no anelastic behaviour could be observed under tension. Finally, we show that ZnO NWs exhibit a high damping merit index, suggesting NWs with point defects are promising for damping applications.

000015406 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015406 653__ $$a

000015406 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015406 720__ $$aZhu, Yong
000015406 8560_ $$ffischerc@itam.cas.cz
000015406 8564_ $$s192807$$uhttps://invenio.itam.cas.cz/record/15406/files/TS.SM12-4.01.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2638, code TS.SM12-4.01
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000015406 962__ $$r13812
000015406 980__ $$aPAPER