Aiming at the mechanical property analysis problem of piezoelectric composite materials with microstructure-based moisture-electro-mechanical multi-physical-field coupling,the moisture-electro-mechanical coupling smoothed finite element method based on asymptotic homogenization was proposed.The theoretical basis of this method includes the basic equation of piezoelectric composite materials,the effective performance parameters predicted by asymptotic homogenization,and the moisture-electro-mechanical coupling effect of piezoelectric composite materials.The dynamic control equation of this method was deduced,and the structural dynamic problems of piezoelectric composite materials were solved by applying the Wilson-θ method.The effects of moisture variation on the structure natural frequency and dynamic response were studied.The results were compared with those of the finite element method to verify the correctness and validity of the method.Therefore,this method has a broad application prospect for analyzing the multi-field coupling mechanical properties of piezoelectric composite components.
关键词
固体力学/有限元法/力-电-湿耦合/渐近理论
Key words
solid mechanics/finite element methods/moisture-electro-mechanical coupling/asymptotic method
维普
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