Cell-Based Smoothed Finite Element Method for Elastic-Electro-Moisture Multi-physical Coupling Field

doi:10.12068/j.issn.1005-3026.2020.09.24

Abstract

Abstract: In order to solve the problem that piezoelectric-based structures were influenced by the moisture in air among the practical engineering application， the Cell-based smoothed finite element method was proposed for the elastic-electro-moisture multi-physical coupling field based on the constitutive equations， geometric equations and equilibrium equations of piezoelectric material. This paper established a piezoelectric-based energy harvester， and further investigated the static behavior of the simplified model. Furthermore， the effects of different moisture changes on the structure performance were studied. Comparing with the numerical results of finite element method， the Cell-based smoothed finite element method employing fewer elements can achieve the same accuracy as finite element method， which verified the accuracy and effectiveness of the as-proposed Cell-based smoothed finite element method. The numerical results show that a slight moisture change provides a strong effect on the generalized displacements of the structures. The investigation of piezoelectric structures under the humid environment provides the theoretical support for composite material productization process.

Key words: Cell-based smoothed finite element method, piezoelectric material, static behavior, hygroscopic effect, moisture

CLC Number:

O344

LI Ming， LIU Ming-rui， ZHOU Li-ming. Cell-Based Smoothed Finite Element Method for Elastic-Electro-Moisture Multi-physical Coupling Field[J]. Journal of Northeastern University Natural Science, 2020, 41(9): 1363-1368.

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