期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 355, 期 -, 页码 1148-1186出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2019.06.040
关键词
Energy scavenging; Hybrid piezoelectric nanodevices; ZnO nanorods; Periodic microstructure; Multi-field homogenization; Bloch wave propagation
资金
- Regione Puglia under the Future in Research Program Development of next generation NEMS for energy harvesting [NSUX1F1]
- National Group of Mathematical Physics (GNFM-INdAM)
- Ministry of Education, Universities and Research, through the PRIN 2015 funding scheme [2015JW9NJT]
In the framework of energy scavenging for applications in flexible/stretchable electronics, hybrid piezoelectric nanogenerators are investigated. They are made up with zinc oxide (ZnO) nanorods, embedded in a polymeric matrix, and grown on a flexible polymeric support. The ZnO nanorods are arranged in clusters, forming nearly regular distributions, so that periodic topologies can be realistically assumed. Focus is on a dynamic multi-field asymptotic homogenization approach, proposed to grasp the overall constitutive behaviour of such complex microstructures. A set of applications, both in static and dynamic regime, is proposed to explore different design paradigms, related to nanogenerators based on three working principles. Both extension and bending nanogenerators are, indeed, analysed, considering either extension along the nanorods axis, or orthogonally to it. The study of the wave propagation is, also, exploited to comprehend the main features of such piezoelectric devices in the dynamic regime. (C) 2019 Elsevier B.V. All rights reserved.
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