Journal
COMPOSITE STRUCTURES
Volume 208, Issue -, Pages 298-313Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2018.09.074
Keywords
Inhomogeneous cell-based smoothed finite element method; Modified Newmark method; Functionally graded magneto-electro-elastic material; Transient response
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Funding
- National Natural Science Foundation of China [51875241, 51505180]
- Jilin Provincial Department of Education [JJKH20180084KJ]
- Fundamental Research Funds for the Central Universities
- Jilin Provincial Department of Science & Technology Fund Project [20160520064JH, 20170101043JC]
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For the sake of surmounting defect of over-stiffness of finite element model (FEM) and accurately solving the transient response problems of structures comprise functionally graded magneto-electro-elastic (FGMEE) materials, we put forward an inhomogeneous cell-based smoothed finite element model (ICS-FEM) and a modified Newmark method. By employing the inhomogeneous gradient smoothing technique into FEM, the mass matrix M and the equivalent stiffness matrix K(eq )are derived, ICS-FEM that provides a stiffness coinciding with the actual condition is also obtained. Moreover, this model can be carried out with user-defined subroutines in the existing FEM software. Several numerical examples including cantilever beams, a layered FGMEE sensor and an FGMEE energy harvester are analyzed, which prove that ICS-FEM could achieve results with higher accuracy and reliability than FEM. ICS-FEM are applied to more complex structures such as FGMEE layered sensor and energy harvester. Therefore, such method to solve the transient characteristics of FGMEE structures can be a reference for the design of smart structures.
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