Computational Analysis of Piezoelectric Systems Using A Coupled Multiphysics Finite Element Model

piezoelectricity;viscoelasticity;finite element analysis;Civil Engineering

Zhu, ZhirenGhosh, Somnath ;

Johns Hopkins University

关键词: piezoelectricity;    viscoelasticity;    finite element analysis;    Civil Engineering;   

Others  :  https://jscholarship.library.jhu.edu/bitstream/handle/1774.2/44645/ZHU-THESIS-2017.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: JOHNS HOPKINS DSpace Repository

【 摘 要 】

A multiphysicsnite element model framework for coupling transient electromagneticand dynamic mechanicalelds is utilized to perform computational analysisof piezoelectric material systems. The model framework achieves coupling betweenthe mechanical and electromagneticelds by solving the corresponding governingequations in the time domain, and is capable of predicting the evolution of electric eld variables in a conducting medium undergoing dynamicnite deformation. Thecomputational model is then calibrated to reproduce experimentally-characterized behaviorof viscoelastic piezo-nanocomposite (p-NC) structures subjected to dynamicloading. The numerical model shows good agreement with experimental results onthe loading-frequency dependent piezoelectric output of p-NC systems. Sensitivitystudy is conducted with the calibrated model to examine the e ect of the mechanicalinput parameters on piezoelectric output of p-NC. Based on thendings, the energyharvesting and sensing performance of p-NC systems can be enhanced by e ectivelyharnessing the viscoelastic properties of the material.