Comparing cone beam laminographic system trajectories for composite NDT
| Autor: | Sam Hawker, Ian Sinclair, Neil S. O'Brien, Mark Mavrogordato, Richard P. Boardman, Thomas Blumensath |
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| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry Materials Science (miscellaneous) Acoustics Delamination Composite number Computational Mechanics 02 engineering and technology Iterative reconstruction 021001 nanoscience & nanotechnology Least squares Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Mechanics of Materials Nondestructive testing Conjugate gradient method 0210 nano-technology Safety Risk Reliability and Quality business Simulation Beam (structure) |
| Zdroj: | Case Studies in Nondestructive Testing and Evaluation. 6:56-61 |
| ISSN: | 2214-6571 |
| DOI: | 10.1016/j.csndt.2016.05.004 |
| Popis: | We compare the quality of reconstruction obtainable using various laminographic system trajectories that have been described in the literature, with reference to detecting defects in composite materials in engineering. We start by describing a laminar phantom representing a simplified model of composite panel, which models certain defects that may arise in such materials, such as voids, resin rich areas, and delamination, and additionally features both blind and through holes along multiple axes. We simulate ideal cone-beam projections of this phantom with the different laminographic trajectories, applying both Simultaneous Iterative Reconstruction Technique (SIRT) and Conjugate Gradient Least Squares (CGLS) reconstruction algorithms. We compare the quality of the reconstructions with a view towards optimising the scan parameters for defect detectability in composite NDT applications. |
| Databáze: | OpenAIRE |
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