期刊
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
卷 29, 期 12, 页码 5217-5222出版社
KOREAN SOC MECHANICAL ENGINEERS
DOI: 10.1007/s12206-015-1121-y
关键词
Confocal Fabry-Perot interferometer (CFPI); Delamination; Laser interferometer; Laser ultrasonic; Pulse laser
资金
- Nuclear Power Core Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning - Ministry of Trade, Industry and Energy, Republic of Korea [20131520100760]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2014 R1A2A2A01005852]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20131520100760] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Carbon-fiber-reinforced plastic should be inspected in the fabrication process to enhance quality by preventing defects, such as delamination and voids. Conventional ultrasonic evaluation methods cannot be applied during the fabrication process because they require contact measurement by a transducer. Thus, an optical method using a laser was employed in this study for non-contact ultrasonic evaluation. Ultrasonic signals were generated by a pulsed laser and received by using a laser interferometer. First, an ultrasonic signal was generated from the back side of a material sample with artificial internal defects in the composite. The ultrasonic signal directed through the interior of the specimen was then detected at the front side. After determining the locations of the internal defects, the defects were quantitatively evaluated from the front side of the composite by using ultrasonic signal generation and reception.
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