Journal
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
Volume 96, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.euromechsol.2022.104708
Keywords
Broadband nanoharvester; Nonlinear magneto-electro-semiconductor; coupling behavior; Screening effect; Active control; Output power
Categories
Funding
- National Natural Science Foundation of China [12072253, 11972176, 12062011]
- Doctoral Science Fund of Lanzhou University of Technology [062002]
- Opening Project from the State Key Laboratory for Strength and Vibration of Mechanical Structures [SV2021-KF-19]
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The study investigates the vibration behavior of composite multiferroic piezoelectric semiconductor nanoharvester and analyses its working performance. The results indicate that the basic behaviors of the nanoharvester can be significantly improved by changing circuit types, semiconductor properties, external magnetic field, pre-stress, and surface effect.
We study the extensional vibration of composite multiferroic piezoelectric semiconductor (PS) nanoharvester driven via a time-harmonic magnetic field. A theoretical analysis about working performances of device is performed based on zero-order plate equations with surface and nonlocal effects, consisting of a nonlinear magneto-mechanical coupling constitutive model for giant magnetostrictive material Terfenol-D and a linear phenomenological theory of PS material ZnO. Numerical results indicate that the basic bahaviors (including resonant frequency, bandwidth characteristic, magneto-electric (ME) coupling effect, output power and energy conversion efficiency) of the nanoharvester, can be dramatically improved through circuit types, semiconduction, external magnetic field, pre-stress and surface effect. This work is essential and crucial for understanding the size-dependent and nonlinear mechanical behaviors of multiferroic PS nanodevices under the extremely complex magnetic field and pre-stress field environments.
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