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17 April 2013 Temperature effect modelling of piezoceramic transducers used for Lamb wave propagation in damage detection applications
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Although damage detection using Lamb waves has been investigated for many years, real engineering applications are limited due to practical aspects related to implementation. Temperature effect is one of the major problems. It is well known that temperature variations influence Lamb wave propagation response parameters. In practice it is important to compensate for this effect. Experimental tests are often required to understand how temperature influences wave propagation. Numerical simulation can ease this task preventing many time-consuming experiments. Simulated Lamb wave responses can be used to develop new methods for temperature compensation. The effect of temperature variations on piezoceramic transducer responses is investigated using finite element modelling. The model takes into account temperature-dependent physical properties of low-profile PZT transducers and transducer bonding layers. The model is used to predict the S0 and A0 Lamb response in aluminium plate for the temperature range from -60 to +40°C. The study shows relevant changes in Lamb wave amplitude response caused by temperature fluctuations. This approach can provide the basis for temperature compensation in ultrasonic guided wave damage detection systems used for structural health monitoring applications.
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P. Kijanka, P. Packo, W. J. Staszewski, and T. Uhl "Temperature effect modelling of piezoceramic transducers used for Lamb wave propagation in damage detection applications", Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 86952C (17 April 2013);

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