An electromechanical impedance approach for quantitative damage detection in Timoshenko beams with piezoelectric patches
| العنوان: | An electromechanical impedance approach for quantitative damage detection in Timoshenko beams with piezoelectric patches |
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| المؤلفون: | C.W. Lim, Weiqiu Chen, Wei Yan, J.B. Cai |
| المصدر: | Smart Materials and Structures. 16:1390-1400 |
| بيانات النشر: | IOP Publishing, 2007. |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | Timoshenko beam theory, Engineering, Admittance, business.industry, Structural engineering, Condensed Matter Physics, Piezoelectricity, Atomic and Molecular Physics, and Optics, Mechanics of Materials, EMI, Signal Processing, Physics::Accelerator Physics, General Materials Science, Structural health monitoring, Electrical and Electronic Engineering, business, Electrical impedance, Beam (structure), Civil and Structural Engineering, Matrix method |
| الوصف: | As a qualitative health monitoring method, the electromechanical impedance technique (EMI) has been widely studied. Due to the complexities of the damaged structures and the difficulties in high-frequency analysis, further information about the nature of damage cannot be obtained using EMI in its conventional non-model-based way. Thus, in this paper, a hybrid technology combining the EMI technique and reverberation matrix method (RMM) is proposed to quantitatively correlate damage in beam structures with high-frequency signatures for structural health monitoring. Timoshenko beam theory is employed to study the dynamics of beam-like structures bonded with multiple pairs of PZT patches. A piecewise, homogeneous beam model is introduced to approximate the nonhomogeneous beam in which inhomogeneity is introduced because damages of an originally uniform beam can be modeled by different cross-sectional properties. Here, only one-dimensional axial vibration of PZT wafers is considered. A shear lag model is adopted to simulate the interfacial bonding between PZT patches and the host beam. An analytical expression of impedance (or admittance) related to the response of the coupled model of the PZT patch-bonding layer–host beam system is derived and then investigated by comparing with other theories. Finally, covariance, a kind of non-parametric damage index, is also employed to identify the damage severity, propagation and location. |
| تدمد: | 1361-665X 0964-1726 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::f5cf386e95bc0fb094b048fdb93e5154 https://doi.org/10.1088/0964-1726/16/4/054 |
| رقم الأكسشن: | edsair.doi...........f5cf386e95bc0fb094b048fdb93e5154 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1361665X 09641726 |
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