Conference proceeding
Wave propagation models for quantitative defect detection by ultrasonic methods
HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS 2008, v 6935(1), pp 69350S-69350S-11
01 Jan 2008
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Ultrasonic guided wave testing necessitates of quantitative, rather than qualitative, information on flaw size, shape and position. This quantitative diagnosis ability can be used to provide meaningful data to a prognosis algorithm for remaining life prediction, or simply to generate data sets for a statistical defect classification algorithm. Quantitative diagnostics needs models able to represent the interaction of guided waves with various defect scenarios. One such model is the Global-Local (GL) method, which uses a full finite element discretization of the region around a flaw to properly represent wave diffraction, and a suitable set of wave functions to simulate regions away from the flaw. Displacement and stress continuity conditions are imposed at the boundary between the global and the local regions.
this paper the GL method is expanded to take advantage of the Semi-Analytical Finite Element (SAFE) method in the global portion of the waveguide. The SAFE method is efficient because it only requires the discretization of the cross-section of the waveguide to obtain the wave dispersion solutions and it can handle complex structures such as multilayered sandwich panels. The GL method is applied to predicting quantitatively the interaction of guided waves with defects in aluminum and composites structural components.
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Details
- Title
- Wave propagation models for quantitative defect detection by ultrasonic methods
- Creators
- Ankit Srivastava - Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USAIvan Bartoli - Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USAStefano Coccia - Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USAFrancesco Lanza di Scalea - Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA
- Contributors
- T Kundu (Editor)
- Publication Details
- HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS 2008, v 6935(1), pp 69350S-69350S-11
- Series
- Proceedings of SPIE
- Publisher
- Spie-Int Soc Optical Engineering
- Number of pages
- 11
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000257136900022
- Scopus ID
- 2-s2.0-44349094323
- Other Identifier
- 991020547436704721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Mechanical
- Optics