@article{lin_yuan_2001, title={Damage detection of a plate using migration technique}, volume={12}, DOI={10.1106/L388-OYY3-VDQC-4V5C}, number={7}, journal={Journal of Intelligent Material Systems and Structures}, author={Lin, X. and Yuan, F. G.}, year={2001}, pages={469–482} }
 @article{lin_yuan_2001, title={Detection of multiple damages by prestack reverse-time migration}, volume={39}, ISSN={["0001-1452"]}, DOI={10.2514/2.1220}, abstractNote={An approach to detect and image multiple damages in a platelike structure is presented. A structural health monitoring system (SHMS) with a linear array of actuators/sensors is proposed. The integrated actuators/sensors are used to activate/receive lowest-order antisymmetric A0 mode Lamb waves. A migration technique used in geophysical exploration and seismic prospecting is adopted to interpret the backscattering wave e eld and to image thee awsinthestructure.Theproposed approachismodeledbya two-dimensional explicite nitedifferencemethod both in simulating the ree ection waves and in implementing the prestack migration. An analytical solution based on Mindlin plate theory (Mindlin, R. D., “ Ine uence of Rotary Inertia and Shear on Flexural Motions of Isotropic, Elastic Plates,” Journal of Applied Mechanics , Vol. 18, No. 1, 1951, pp. 31 ‐38) is derived to verify the accuracy of the numerical algorithm. An excitation-time imaging condition specie cally for the migration of waves in a plate is introduced based on a ray tracing concept, and prestack reverse-time migration is proceeded to propagate the ree ection energy back to the damages. The plate is imaged in terms of the velocity of transverse deformation after migration,thus, thelocations, dimensions, and seriousness of thee awscan bevisually displayed. Numerical results show that multiple damages can be successfully detected and the image of the damages correlate well with the target damages. The conclusion is that prestack migration can be a prospective technique in SHMS applications.}, number={11}, journal={AIAA JOURNAL}, author={Lin, X and Yuan, FG}, year={2001}, month={Nov}, pages={2206–2215} }
 @article{lin_yuan_2001, title={Diagnostic Lamb waves in an integrated piezoelectric sensor/actuator plate: analytical and experimental studies}, volume={10}, ISSN={["0964-1726"]}, DOI={10.1088/0964-1726/10/5/307}, abstractNote={The objective of this study is to model the diagnostic transient waves in an integrated piezoelectric sensor/actuator plate with a view to using it as a first step towards establishing an entire structural health monitoring system and to provide experimental verification of the proposed models. PZT ceramic disks are surface mounted on an aluminum plate acting as both actuators and sensors to generate and collect A0 mode Lamb waves. Mindlin plate theory is adopted to model the propagating waves by taking both transverse shear and rotary inertia effects into account. Actuator and sensor models are both proposed. The interaction between an actuator and the host plate is modeled based on classical lamination theory. The converse piezoelectric effect of the actuator is treated as an equivalent bending moment applied to the host plate. The sensor acts as a capacitor that converts the sensed strain change into a voltage response. An analytical expression for the sensor output voltage in terms of the given input excitation signal is derived, and then experimental work is performed to verify the accuracy of the analytical model. Experimental results show that single-mode Lamb waves in the plate can be successfully generated and collected through the integrated PZT disks. The experiment also shows that the predicted sensor output for both amplitude and phase agrees well with experimentally collected data.}, number={5}, journal={SMART MATERIALS & STRUCTURES}, author={Lin, X and Yuan, FG}, year={2001}, month={Oct}, pages={907–913} }