An Experimental Investigation of the Temperature Effect on AntiResonance Frequency

Structural health monitoring is an interdisciplinary field that it is possible to identify defects in the structure or components of the structure at an early stage. The sensors used in structural health monitoring are called the piezoelectric wafer active sensor (PWAS) as they can make simultaneous diagnostics. PWAS transducers are widely used in mechanical engineering, civil engineering and especially aviation and aerospace engineering. It is important to accurately estimate the dynamic behavior of free and constrained PWAS under different mechanical conditions. PWAS has different behaviors at varying environmental conditions and temperature fluctuations. In this study, the behavior of free PWAS at room temperature is investigated experimentally. Then the free PWAS behavior at room temperature is examined after exposure to ambient temperatures ranging from -10 °C to -40 °C at 10 °C intervals. As a result of these studies, the function of the anti-resonance frequency at varying temperatures is derived.