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Journals / Politeknik Dergisi / 2021 / Cilt: 24 - Sayı: 2

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

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

Gökhan HAYDARLAR
Mesut TEKKALMAZ
M. Alper SOFUOĞLU
Pages
481–494
Publication Date
2022-10-18
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The experimental results were analyzed using a curve/probabilistic fitting approach.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The purpose of structural health monitoring is to provide information by making a simultaneous diagnosis of the status of thestructure.
📊
Key Findings & Data: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.
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Conclusion & Impact:The experimental results were analyzed using a curve/probabilistic fitting approach.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

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.

Özet

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.

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Cite This Article

HAYDARLAR, G., TEKKALMAZ, M., SOFUOĞLU, M. A. (2022). Curve/probabilistic fitting of damage metrics for Al-7075 materials behavior by using electromechanical impedance method. Politeknik Dergisi, Cilt: 24 - Sayı: 2, 481–494. https://ajindex.com/articles/588417

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