| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
This study is concerned with a development of ultrasonic non-destructive method for characterization of surface-breaking cracks on a steel plate using leaky Lamb waves, which is a kind of acoustic waves generated by guided-waves traveling in a fluid-loaded solid. To begin with, a simulation code was developed to analyze generation and propagation mechanisms of the leaky waves. A numerical inverse technique to identify surface-breaking crack was then proposed in conjunction with a guided wave mode-separation technique. Finally, a high-precision and resolution leaky wave measurement system was developed for future experimental validation of the proposed technique
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