Finite Element EMI Model for Cracked Portal Frame and Parameter Study

Abstract:

Based on the three-dimensional finite element method (3D FEM), an electro-mechanical impedance (EMI) model is established for a cracked portal frame. In this analysis, the effect of the interfacial properties between the piezoelectric patches and the host structure on the EMI signatures is considered and thus a coupled structural system consisting of PZT patches, bonding layer and host structure is then investigated. Comparison with numerical results by other methods is made to validate the effectivity and accuracy of the proposed EMI model. The effects of various parameters including the material properties of the adhesive, the crack depth and the crack position etc. on the EMI signatures are highlighted. Numerical results indicate that the present model can be employed for structural damage detection.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 1181-1184
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.1181
• Online since: November 2012
• Authors: Wei Yan, Wan Chun Li, Wei Wang
• Keywords: Damage Detection, EMI, Parameter Study, Three-Dimensional Finite Element

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