刊物主题:Structural Mechanics; Characterization and Evaluation of Materials; Vibration, Dynamical Systems, Control; Classical Mechanics;
出版者:Springer US
ISSN:1573-4862
卷排序:36
文摘
Resonant ultrasound spectroscopy (RUS) is an NDE technique that evaluates a sample based on its predicted resonant behavior, but RUS is limited by lack of spatial resolution and small specimen size. Air-coupled ultrasonic resonance imaging (ACURI) is a new NDE technique that is based on RUS but introduces a spatial resolution by generating an image of the flexural vibration modes. This paper presents experimental results of ACURI applied to hexagonal silicon carbide tiles. Frequency sweep scans demonstrate the ability of air-coupled transducers to detect resonance modes. Several mode shapes are imaged and compared to Finite Element simulations with good agreement. Visual comparison allows for easy detection of material differences such as density variations.