Evaluation of effect changing temperature on lamb-wave based structural health monitoring
Abstract
The purpose of this paper is to investigate the effect of temperature change on the Lamb wave-based SHM method. This study evaluates the Lamb wave method’s ability to detect damage to an AL2024-T3 sheet, assessed by a near-surface hole. Lamb waves are created via numerical simulation with the commercial Finite Element (FE) package ABAQUS. In this study, the Lamb wave-based SHM method using displacement responses is used. The results indicate that this method is able to detect a near-surface hole in the AL2024-T3 sheet as well as its location, with close approximation. Subsequently, the AL1100 sheet was investigated for changes in temperature from this method, which was evaluated over a temperature range of –200(°C) to 204(°C). The results show that temperature change in the range of –200(°C) to 93(°C) has no effect on the displacement responses. However, the graphs related to temperature change of more than 149(°C) do not overlap with the reference temperature. Hence, it has been concluded that Lamb waves can be used as an SHM method in the temperature range of –200(°C) to 93 (°C) without having to worry about the effects of temperature change on the results.
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Author Biography
Sattar Mohammadi Esfarjani received his M.Sc. degree in Mechanical Engineering – Applied designing major from the Islamic Azad University of Najafabad in 2016. He has published 12 papers in credible international journals and 2 papers in international conferences. His current research interests include; structural health monitoring and damage detection methods based on vibration and ultrasonic methods, MEMS, NDT, welding, pipeline engineering, composite, temperature changes effect on the vibration methods.
Copyright (c) 2020 Sattar Mohammadi Esfarjani
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