TY - JOUR

T1 - Curved flexoelectric and piezoelectric micro-beams for nonlinear vibration analysis of energy harvesting

AU - Thai, Tran Quoc

AU - Zhuang, Xiaoying

AU - Rabczuk, Timon

N1 - Funding Information: Tran Quoc Thai and Xiaoying Zhuang would like to acknowledge the financial support from the Sofja Kovalevskaja Prize of the Alexander von Humboldt Foundation (Germany) and ERC Starting Grant ( 802205 ). The authors would like to acknowledge Dr. Kaifa Wang, Harbin Institute of Technology, Graduate School at Shenzhen for useful comments regarding the material parameters for the flexoelectric model.

PY - 2023/3/1

Y1 - 2023/3/1

N2 - Micro/nano-scale energy harvester is an enabling technology to provide sustained energy solutions for various micro/nano-electromechanical devices, this has attracted intensive research interests in both academia and industry in the past decades. Exploring various design possibilities for energy harvesters in terms of geometry, topology, materials as well as harnessing the interesting nonlinear responses have the potential to break the current limit of energy harvesters in terms of energy efficiency and power density. While most designs were limited to straight beams, in this work, we demonstrate that the nonlinear vibration of energy harvester is significantly affected by curved shapes and we show the possibility of improving its performance by tuning the structural curvature. By developing a couple stress-based piezo-flexoelectric curved beam model and using the multiple time scale method for the nonlinear frequency response analysis, the effect of structural curvature in the nanoscale arc-shaped beam is quantitatively evaluated.

AB - Micro/nano-scale energy harvester is an enabling technology to provide sustained energy solutions for various micro/nano-electromechanical devices, this has attracted intensive research interests in both academia and industry in the past decades. Exploring various design possibilities for energy harvesters in terms of geometry, topology, materials as well as harnessing the interesting nonlinear responses have the potential to break the current limit of energy harvesters in terms of energy efficiency and power density. While most designs were limited to straight beams, in this work, we demonstrate that the nonlinear vibration of energy harvester is significantly affected by curved shapes and we show the possibility of improving its performance by tuning the structural curvature. By developing a couple stress-based piezo-flexoelectric curved beam model and using the multiple time scale method for the nonlinear frequency response analysis, the effect of structural curvature in the nanoscale arc-shaped beam is quantitatively evaluated.

KW - Couple stress

KW - Curved beam

KW - Energy harvesting

KW - Flexoelectricity

KW - Nonlinear frequency response

KW - Piezoelectricity

UR - http://www.scopus.com/inward/record.url?scp=85144816817&partnerID=8YFLogxK

U2 - 10.1016/j.ijsolstr.2022.112096

DO - 10.1016/j.ijsolstr.2022.112096

M3 - Article

AN - SCOPUS:85144816817

VL - 264

JO - International Journal of Solids and Structures

JF - International Journal of Solids and Structures

SN - 0020-7683

M1 - 112096

ER -