A unified constrained inversion model for ultrasonic flaw sizing |
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| Authors: | Lester W Schmerr Jr Alexander Sedov Chien-Ping Chiou |
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| Affiliation: | (1) Center for NDE, Iowa State University, 50011 Ames, IA, USA;(2) Department of Engineering Science and Mechanics, Iowa State University, 50011 Ames, IA, USA;(3) Engineering Research Institute, Iowa State University, 50011 Ames, IA, USA;(4) Department of Mechanical Engineering, Lakehead University, P7B 5E1 Thunder Bay, Ontario, Canada;(5) Department of Engineering Science and Mechanics, Iowa State University, 50011 Ames, IA, USA |
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| Abstract: | Equivalent flaw sizing using ultrasonic waves is an approach whereby shape and orientation information of a defect are obtained in terms of a best-fit simple geometry that is able to represent the major aspects of the flaw. Separate examples of this approach have previously been developed for volumetric flaws and cracks using the Born and Kirchhoff approximations, respectively. Here, these separate algorithms are unified into a single algorithm capable of sizing both volumetric flaws and cracks. Some examples of the performance of this unified algorithm on both synthetic and experimental data are also given. |
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