| Budget Amount *help |
¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2010: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2009: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Research Abstract |
In the present research, two non-contact nondestructive ultrasonic methods of electromagnetic acoustic transducer(EMAT) and air-coupled ultrasonic method are considered. For these two non-contact ultrasonic methods, numerical codes of time domain boundary element methods are developed to investigate wave characteristics, which are verified in basic experiments. Also images of defects in experimental specimens are reconstructed from measured wave data by means of the synthetic aperture focusing technique(SAFT). Furthermore, an innovative inversion method is proposed for shape reconstruction of defects using guided waves in a plate.
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