Abstract
The use of ultrasonic arrays to image and size crack-like defects is an important area in non-destructive evaluation. The features in the ultrasonic data from a crack-like defect provide information about the size and orientation angle of the defect. In this paper, the characteristics of a crack-like defect were measured from its scattering coefficient matrix, when the angular coverage of measurement includes the specular regions of its scattering matrix. Alternatively, the imaged features for a large crack-like defect (its length more than two wavelengths) were directly used to characterize the defect through a rectangular box fitting approach. An efficient hybrid model was used to generate the full matrix of array data from samples with a defect and for a specified inspection configuration. This hybrid model combines far-field scattering coefficient matrix for defects with a ray based forward model. This model offers the potential to compile a look-up table through which defects can be classified and then sized. Good agreement was achieved between simulation and experimental results hence validating this model based approach.
Original language | English |
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Title of host publication | REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 29A AND 29B |
Editors | DO Thompson, DE Chimenti |
Place of Publication | MELVILLE |
Publisher | American Institute of Physics (AIP) |
Pages | 895-902 |
Number of pages | 8 |
ISBN (Print) | 978-0-7354-0748-0 |
Publication status | Published - 2010 |
Event | 36th Annual Review of Progress in Quantitative Nondestructive Evaluation - Kingston, Jamaica Duration: 26 Jul 2009 → 31 Jul 2009 |
Conference
Conference | 36th Annual Review of Progress in Quantitative Nondestructive Evaluation |
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Country/Territory | Jamaica |
City | Kingston |
Period | 26/07/09 → 31/07/09 |