Active thermographic inspection of carbon fiber reinforced plastic laminates using laser scanning heating
| Autor: | Masashi Koyama, Masaki Ando, Hideo Nishino, Masashi Ishikawa |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Laser scanning Phase (waves) 02 engineering and technology Fibre-reinforced plastic 021001 nanoscience & nanotechnology Thermographic inspection 020303 mechanical engineering & transports Co 2 laser 0203 mechanical engineering Flash (manufacturing) Ceramics and Composites Fiber Composite material 0210 nano-technology Civil and Structural Engineering |
| Zdroj: | Composite Structures. 209:515-522 |
| ISSN: | 0263-8223 |
| DOI: | 10.1016/j.compstruct.2018.10.113 |
| Popis: | In this study, inspection capability of active thermographic nondestructive inspection using the laser scanning method was examined. Carbon fiber reinforced plastic (CFRP) specimens were heated using a CO 2 laser scanning device and their inspection capability was investigated. The experimental results indicate that the temperature and phase behavior after laser scanning heating were similar to those after conventional instantaneous flash heating. We also investigated the effect of the relationship between the scanning direction and fiber direction of the tested CFRPs on defect detection . The numerical and experimental results showed that the observed temperature contrast appearing on the defective surface varied depending on the scanning direction, and the temperature contrast increased when the scanning direction was the same as the fiber direction of the laminates. In addition, it was found that defects in a CFRP specimen located 10 m from the heat source could be detected using the laser scanning heating. These results suggest that using the laser scanning heating method is effective to inspect large objects located at far distances. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect