Title:
A comprehensive approach for wavefield-based characterization of ultrasonic shear wave scattering in plates
A comprehensive approach for wavefield-based characterization of ultrasonic shear wave scattering in plates
| dc.contributor.advisor | Michaels, Jennifer E. | |
| dc.contributor.author | Weng, Yu | |
| dc.contributor.committeeMember | Lanterman, Aaron D. | |
| dc.contributor.committeeMember | Zhang, Ying | |
| dc.contributor.committeeMember | Sabra, Karim | |
| dc.contributor.committeeMember | Ruzzene, Massimo | |
| dc.contributor.department | Electrical and Computer Engineering | |
| dc.date.accessioned | 2018-05-31T18:14:13Z | |
| dc.date.available | 2018-05-31T18:14:13Z | |
| dc.date.created | 2018-05 | |
| dc.date.issued | 2018-04-03 | |
| dc.date.submitted | May 2018 | |
| dc.date.updated | 2018-05-31T18:14:14Z | |
| dc.description.abstract | The objective of this research is to present a comprehensive approach for characterizing and quantifying the scattering of angle-beam ultrasonic shear waves from a variety of scatterers in plates. The motivation behind analyzing angle-beam shear wave propagation and scattering is to obtain a better understanding of shear wave interactions with defects and improve the reliability and accuracy of inspection techniques for nondestructive evaluation. The scatterers investigated here include through-holes, part-through holes, and notches emanating from through-holes. Scattering from both through-holes and notches, aimed to mimic actual ultrasonic defects in practice, is of particular interest to the aerospace industry because crack-like defects usually grow from fastener holes, which presents a potential hazard to aircraft components if undetected. There are two main contributions of this research. One is the acquisition of a comprehensive set of wavefield data for a variety of scattering scenarios via wavefield imaging. The other is the development of a systematic methodology for ultrasonic shear wave scattering estimation using a complete set of signal processing techniques. All methodologies presented in this thesis are demonstrated to be effective and reliable for showing useful scattering information. | |
| dc.description.degree | Ph.D. | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.uri | http://hdl.handle.net/1853/59885 | |
| dc.language.iso | en_US | |
| dc.publisher | Georgia Institute of Technology | |
| dc.subject | Angle-beam shear waves | |
| dc.subject | Wavefield imaging | |
| dc.subject | Ultrasonic scattering | |
| dc.subject | Ultrasonic ray tracing | |
| dc.subject | Ultrasonic signal processing | |
| dc.subject | Nondestructive evaluation | |
| dc.title | A comprehensive approach for wavefield-based characterization of ultrasonic shear wave scattering in plates | |
| dc.type | Text | |
| dc.type.genre | Dissertation | |
| dspace.entity.type | Publication | |
| local.contributor.corporatename | School of Electrical and Computer Engineering | |
| local.contributor.corporatename | College of Engineering | |
| relation.isOrgUnitOfPublication | 5b7adef2-447c-4270-b9fc-846bd76f80f2 | |
| relation.isOrgUnitOfPublication | 7c022d60-21d5-497c-b552-95e489a06569 | |
| thesis.degree.level | Doctoral |