Identification of Orientation-Specific Damage Using Guided Waves and Diagnostic Imaging
Guided-waves-based diagnostic imaging techniques have been attracting much attention due to their merits including easily interpretable image, high identification accuracy and suitable for online surveillance. In this study, to envisage the difficulty in detecting orientation-specific damage (crack, notch etc.), a novel guided-waves-based diagnostic imaging technique capable of inspecting complicated engineering structures was developed, in terms of the relationship between damage parameters (location, orientation and severity) and extracted guided waves signal features (time-of-flight, signal correlation and signal energy). Experimental studies were performed to verify the developed diagnostic imaging approach, where a through-thickness crack was successfully identified in a metallic plate and a part of real rail structure respectively.
Yunn Lin Hwang
C. Zhou et al., "Identification of Orientation-Specific Damage Using Guided Waves and Diagnostic Imaging", Applied Mechanics and Materials, Vol. 883, pp. 16-21, 2018