Abstract
Structural Health Monitoring (SHM) is a critical aspect of maintaining the safety and integrity of infrastructure. In recent years, there has been a significant shift towards adopting innovative techniques, and one of the most promising methods is Electromechanical Impedance (EMI). EMI involves the utilization of piezoelectric transducers to assess the health of structures in real-time by examining changes in their electrical characteristics. The presence of load causes a change in structural stiffness, which alters the resonant characteristics of the structure. Understanding how external factors like load and temperature influence the electrical impedance of these sensors is essential for its reliable application in damage detection. This article presents an experimental and numerical study to investigate the effects of load and temperature on the electrical impedance of a piezoelectric sensor used in the electromechanical impedance (EMI) technique. The experimental setup uses an impedance analyzer (Agilent 4294A model) to measure the in-situ EMI of piezoelectric wafer active sensors (PWAS) attached to the monitored structure. The numerical model uses ANSYS software to simulate an aluminum beam at varying temperatures. The results show that the load and temperature have a significant effect on the impedance of the transducer. However, it is shown that it is still possible to detect damage using EMI even under varying load and temperature conditions. The results also show that the accuracy of EMI-based damage detection can be improved by using temperature and load compensation techniques.
Keywords
Structural health monitoring Electromechanical impedance Piezoelectric sensor Load detection Temperature compensation
References
- Balouchi, S., Khaleghian, S., & Gholipour, A. (2019). Electromechanical impedance (EMI) technique for structural health monitoring: A review. IEEE Access, 7, 174392-174413.
- Djemana, M., & Hrairi, M. (2016). Modelling and simulation of impedance-based damage monitoring of structures. Int. J. Simul. Model, 15(3), 395-408.
- Djemana, M., Hrairi, M., & Yatim, N. H. M. (2022). Improving Electromechanical Impedance Damage Detection Under Varying Temperature. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 92(1), 123-133.
Details
| Primary Language | English |
|---|---|
| Subjects | Environmental and Sustainable Processes |
| Journal Section | Articles |
| Authors | |
| Early Pub Date | December 28, 2023 |
| Publication Date | December 30, 2023 |
| Published in Issue | Year 2023Volume: 26 |
