Gökhan HAYDARLAR, Mesut TEKKALMAZ, M. Alper SOFUOĞLU

Elektromekanik Empedans Yöntemi Kullanılarak Al7075 Malzeme Davranışı İçin Hasar Metriklerinin Eğrisel / Olasılıksal Tahmini

Yapısal sağlık izlemenin amacı, yapının durumunun eş zamanlı teşhisini yaparak bilgi sağlamaktır. Yaşlanmaya, çevresel koşullara ve öngörülemeyen koşullara rağmen yapı tasarımda belirtildiği gibi kalmalıdır. Çevresel koşulların değiştirilmesi, sensör ve eklendiği yapının malzeme özelliklerini değiştirmesine neden olur. Yanlış teşhisi önlemek için çevresel koşulları dikkate almak önemlidir. Bu sayede, değişimin gerçek nedeni belirlenebilir. Bu çalışmada değişen çevresel koşullar altında sınırlandırılmış piezoelektrik sensörün (PWAS)/Al davranışı elektromekanik empedans (EMI) yöntemi kullanılarak araştırılmıştır. Literatürde bu materyal üzerinde yapılan sayısal çalışmalar sınırlıdır. Tüm deneysel / sayısal sonuçlar sıcaklık etkisi için telafi edilmiştir ve ilk kez eğri/olasılıksal tahmin yaklaşımı kullanılarak analiz edilmiştir. Deneysel çalışmada kullanılan numune ANSYS sonlu elemanlar programında modellenmiştir. Deneysel ve sayısal sonuçlarda sıcaklık azaldıkça frekansın sağa doğru kaydığı ve genliğin arttığı gözlenmiştir. Deneysel ve sayısal sonuçların yakın olduğu belirlenmiştir. Sıcaklık etkisi, deneysel ve sayısal çalışmalar için telafi algoritması kullanılarak telafi edilmiştir. Sonuçlar hasar metrikleri kullanılarak karşılaştırılmıştır. Deneysel sonuçlar bir eğri/olasılıksal tahmin yaklaşımı kullanılarak analiz edilmiştir.

Curve/probabilistic fitting of damage metrics for Al-7075 materials behavior by using electromechanical impedance method

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

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[1] Shankar R.,“An integrated approach for structural health monitoring”, PhD thesis, Indian Institute of Technology Delhi, Department of Civil Engineering, India, (2009).
[2] Aktan A. E., Helmicki A. J., Hunt V. J., “Issues in health monitoring for intelligent infrastructure”, Smart Materials and Structures, 7(5): 674-692, (1998).
[3] Doebling S. W., Farrar C. R., Prime M. B., “A summary review of vibration-based damage identification methods, The Shock and Vibration Digest, 30(2): 91-105, (1998).
[4] Hooker M. W., “Properties of PZT-based Piezoelectric Ceramics between 150 and 250 °C”, Technical Report, National Aeronautics and Space Administration, (1998).
[5] Grisso B. L., Inman D. J., “Temperature corrected sensor diagnostics for impedance-based SHM”, Journal of Sound and Vibration, 329(12): 2323-2336, (2010).
[6] Sepehry N., Shamshirsaz M., Bastani A., “Experimental and theoretical analysis in impedance-based structural health monitoring with varying temperature”, Structural Health Monitoring: An International Journal, 10(6): 573-585, (2010).
[7] Freitas V. F., Santos I. A., Botero É., Fraygola B. M., Garcia D., Eiras J. A., “Piezoelectric Characterization of (0.6)BiFeO3-(0.4)PbTiO3 Multiferroic Ceramics”, Journal of the American Ceramic Society, 94(3): 754- 758, (2011).
[8] Gupta V., Sharma M., Thakur N., Singh S. P., “Active vibration control of a smart plate using a piezoelectric sensor–actuator pair at elevated temperatures”, Smart Materials and Structures, 20(10): 105023:1-13, (2011).
[9] Bukhari S., Islam M., Haziot A., Beamish J., “Shear piezoelectric coefficients of PZT, LiNbO3and PMN-PT at cryogenic temperatures”, Journal of Physics: Conference Series, 568(3): 032004:1-5, (2014).
[10] Baptista, F. G., Budoya, D. E., de Almeida, V. A., Ulson, J. A., “An experimental study on the effect of temperature on piezoelectric sensors for impedance-based structural health monitoring”, Sensors (Basel), 14(1): 1208-1227, (2014).
[11] Zou D., Liu T., Liang C., Huang Y., Zhang F., Du C., “An experimental investigation on the health monitoring of concrete structures using piezoelectric transducers at various environmental temperatures”, Journal of Intelligent Material Systems and Structures, 26(8):1028- 1034, (2015).
[12] Amezquita-Sanchez J., Valtierra-Rodriguez M., Aldwaik M., Adeli H., “Neurocomputing in Civil Infrastructure”, Scientia Iranica, 23(6): 2417-2428, (2016).
[13] Fallahian S., Joghataie A., Kazemi M., “Structural damage detection using time domain responses and teaching–learning-based optimization (TLBO) algorithm”, Scientia Iranica, (2017) doi: 10.24200/sci.2017.4238
[14] Rabelo D.S., Steffen V., Neto R.M.F. and Lacerda H.B., “Impedance-based structural health monitoring and statistical method for threshold-level determination applied to 2024-T3 aluminum panels under varying temperature”, Structural Health Monitoring, 16(4): 365- 381, (2017).
[15] Wandowski T., Malinowski P. H., Ostachowicz W. M., “Delamination detection in CFRP panels using EMI method with temperature compensation”, Composite Structures, 151: 99-107, (2016).
[16] Xu G., Xu B., Xu C., Luo Y., “Temperature effects in the analysis of electromechanical impedance by using spectral element method”, Multidiscipline Modeling in Materials and Structures, 12(1): 119-132, (2016).
[17] Haider M. F., Giurgiutiu V., Lin B., Yu L., “Irreversibility effects in piezoelectric wafer active sensors after exposure to high temperature”, Smart Materials and Structures, 26(9): 095019:1-14, (2017).
[18] Rezvani K. Maia M., Sabour M., “Comparison of Some Methods for Structural Damage Detection”, Scientia Iranica, 25(3): 1312-1322, (2018).
[19] Tseng K.K., Wang L., “Smart piezoelectric transducers for in situ health monitoring of concrete”, Smart Materials and Structures., 13(5): 1017-1024, (2004).
[20] Yang Y., Lim Y. Y., Soh C. K., “Practical issues related to the application of the electromechanical impedance technique in the structural health monitoring of civil structures: I. Experiment”, Smart Materials and Structures, 17(3): 035008:1-14, (2008).
[21] Lim Y.Y., Soh C.K., “Fatigue life estimation of a 1D aluminum beam under mode-I loading using the electromechanical impedance technique”, Smart Materials and Structures, 20(12): 125001:1-12, (2011).
[22] Hamzeloo S.R., Shamshirsaz M., Rezaei S.M., “Damage detection on hollow cylinders by electro-mechanical impedance method: Experiments and finite element modeling”, C. R. Méc., 340: 668–677, (2012).
[23]https://www.piceramic.com/en/products/piezoceramicmaterials/#c15162, “PI Ceramic Piezoelectric MaterialsMaterial Data”, (1996).
[24] Imaoka S, Ansys tip of the week: Conversion of piezoelectric material data, (http://ansys.net/ansys/tips/Week13 TNT Conversion of Piezoelectric Material Data. pdf), (1999).
[25] Türker Ö., “Designing And Manufacturing of PZT/ Polymer Based Smart Beams Which Compatible Active Vibration Control”, Master Thesis, Istanbul Technical University, Istanbul, Turkey, (2009).
[26] Jyoti A., “Modelling and analysis of PZT Micro power Generator”, PhD Thesis, Auburn University, (2008).
[27] http://www.americampiezo.com, “APC International Ltd. Product Manual- Piezoelectric Ceramic: Principles and Applications”, (2006).
[28] http://www.piezo.com/catalog8.pdf, “Piezo System Inc.”, (1997).
[29] Kabeya K. I., “Structural Health Monitoring Using Multiple Piezoelectric Sensors and Actuators”, Master of Science thesis, VirginiaTech University, (1998).
[30] Lerch R., 1990, “Simulation of piezoelectric devices by two- and three-dimensional finite elements”, IEEE Trans Ultrason Ferroelectr Freq Control, 37(3): 233-247, (1990).
[31] Naillon M., Coursant R., Besnier F., “Analysis of piezoelectric structures by a finite-element method”, Acta Electronica, 25(4): 341-362, (1983).