| Autor: |
O. Focke, P. Huke, A. Hildebrandt, Donald O. Thompson, Dale E. Chimenti |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.3591866 |
| Popis: |
Standard ultrasound methods using a phased‐array or a single transducer are commonly used for non‐destructive evaluation (NDE) during manufacturing of carbon fiber reinforced plastics (CFRP) parts and certificated testing schemes were developed for individual parts and geometries. However, most testing methods need direct contact, matching gels and remain therefore time consuming. Laser‐Ultrasonics is advantageous due to the contactless measurement technology and high accessibility even on complex parts. Despite the non‐destructive testing with body waves, we show that the NDE can be expanded using two‐dimensional surface (Lamb) waves for detection of delaminations close to the surface or small deteriorations caused by e.g. impacts. Lamb waves have been excited with a single transducer and with a short‐pulse Laser with additionally producing A0‐and S0‐Lamb waves. The waves were detected with a shearography setup that allows for measuring two‐dimensionally the displacement of a surface. Short integration t... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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