Print Email Facebook Twitter Computational Time Reversal for NDT Applications Using Experimental Data Title Computational Time Reversal for NDT Applications Using Experimental Data Author Lopatin, Craig (Technion) Rabinovich, Daniel (Technion) Givoli, D. (TU Delft Applied Mechanics; Technion) Turkel, Eli (Tel Aviv University) Date 2017-09-01 Abstract A model-based non destructive testing (NDT) method is proposed for damage identification in elastic structures, incorporating computational time reversal (TR) analysis. Identification is performed by advancing elastic wave signals, measured at discrete sensor locations, backward in time. In contrast to a previous study, which was purely numerical and employed only synthesized data, here an experimental system with displacement sensors is used to provide physical measurements at the sensor locations. The performance of the system is demonstrated by considering two problems of a thin metal plate in a plane stress state. The first problem, which represents passive damage identification, consists in finding the location of a small impact region from remote measurements. The second problem is the identification of the location of a square hole in the plate. The difficulties one encounters in applying this identification method and ways to overcome them are described. It is concluded that while this is a viable model-based identification method, which may lead, after further development, to a practical NDT procedure, one must be careful when drawing conclusions about its performance based solely on numerical experiments with synthesized data. Subject Finite elementsInverse problemsModel basedNon destructive evaluationNon destructive testingTime reversal To reference this document use: http://resolver.tudelft.nl/uuid:61f0c476-b94d-43d2-a0ae-b9412d7b9442 DOI https://doi.org/10.1007/s10921-017-0424-6 ISSN 0195-9298 Source Journal of Nondestructive Evaluation, 36 (3) Part of collection Institutional Repository Document type journal article Rights © 2017 Craig Lopatin, Daniel Rabinovich, D. Givoli, Eli Turkel Files PDF 10.1007_s10921_017_0424_6.pdf 3.96 MB Close viewer /islandora/object/uuid:61f0c476-b94d-43d2-a0ae-b9412d7b9442/datastream/OBJ/view