Electronic Shearography with Thermal Loading for Detecting Debonds in Thick Polyurethane/Steel Panels for Marine Applications
| Autor: | James B. Spicer, F. Lanza di Scalea, Robert E. Green |
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| Rok vydání: | 2000 |
| Předmět: |
Optical fiber
Materials science Mechanical Engineering Deformation (meteorology) Condensed Matter Physics Sizing law.invention Interferometry chemistry.chemical_compound chemistry Shearography Mechanics of Materials law Thermal Astronomical interferometer General Materials Science Composite material Polyurethane |
| Zdroj: | Research in Nondestructive Evaluation. 12:43-51 |
| ISSN: | 1432-2110 0934-9847 |
| Popis: | We demonstrate that electronic shearography with thermal loading can be effectively applied to the nondestructive detection of debonds in thick polyurethane/steel structures usually employed in the hulls of military ships. A compact fiber-optics shearographic interferometer has been developed that allows remote full-field measurements in real time. Three known debonds in a polyurethane/steel test panel are clearly detected by observing their increased deformation as they cool down after the application of a thermal load. It is also shown that the debond edges can be identified. The results obtained indicate that the shearographic interferometer is well-suited for field detection and sizing of debonds in such panels. Future refinements to the system will include the use of high-power, pulsed illumination for the imaging of large areas and consequent real-time mapping of possible debonds. |
| Databáze: | OpenAIRE |
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