HSIN-HAOU HUANGChun Kun Chiang2024-10-182024-10-182023-12-1510139826https://www.scopus.com/record/display.uri?eid=2-s2.0-85205124178&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/722228Ultrasonic Lamb waves have gained popularity in non-destructive testing of plate-like structures due to their advantages such as low attenuation, high sensitivity, and wide detection range. This paper presents a novel baseline-free method for inspecting curved plate-like structures based on reciprocity loss. The method combines a modified damage imaging algorithm, a baseline-free detection method based on time reciprocity, and a calculation method for damage index values using the analysis of the focus position of time reciprocity signals. Experimental results demonstrate favorable effectiveness of the baseline-free method in detecting and locating multiple defects in the curved plate made of composite laminate.falseBaseline-free methodDamage localizationLamb wavemobile transducer setTime reciprocityjournal article10.4028/p-KVttX12-s2.0-85205124178