Curve/Probabilistic Fitting of Damage Metrics for Al-7075 Materials Behavior by Using Electromechanical Impedance Method

Year 2021, Volume: 24 Issue: 2, 481 - 494, 01.06.2021

Gökhan Haydarlar , Mesut Tekkalmaz , Mehmet Alper Sofuoğlu

https://doi.org/10.2339/politeknik.698644

Cited By: 2

Abstract

The purpose of structural health monitoring is to provide information by making a simultaneous diagnosis of the status of the structure. Despite aging, environmental conditions and unforeseen circumstances, the construction should remain as specified in the design. Changing the environmental conditions causes the sensor and the host structure to change material properties. It is essential to take into account environmental conditions to prevent misdiagnosis. Therefore, the real cause of the change can be determined.
In this study, the behavior of constrained piezoelectric wafer active sensor (PWAS)/Al 7075 was investigated by using electromechanical impedance method (EMI) under changing environmental conditions. Numerical studies on this material in the literature are limited and all the experimental/ numerical results are compensated for the temperature effect and analyzed using curve/probabilistic fitting approach for the first time. The sample used in the experimental work was modeled in ANSYS finite element program. In the experimental and numerical results, it has been observed that as the temperature decreases, the frequency shifts to the right and the amplitude increases. The experimental and simulation results were nearly the same. The temperature effect was compensated using the compensation algorithm for experimental and numerical studies. The results were compared using damage metrics. The experimental results analyzed using a curve/probabilistic fitting approach

Keywords

Structural health monitoring, piezoelectric sensors, electromechanical impedance method, temperature effect, damage metrics, curve fitting

Supporting Institution

Eskişehir Osmangazi Üniverstesi

Project Number

201715A119

Thanks

The authors declare that there is no conflict of interest. This article does not contain any studies with human participants or animals performed by any of the authors. This work was supported by the Scientific Research Projects Commission of Eskişehir Osmangazi University as project number 201715A119.

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