| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 11020751 | Applied Acoustics | 2019 | 6 Pages |
Abstract
In this work, in order to improve the detecting ability of laser ultrasonic testing technique for inner cracks in metals, an arc-line-focused laser source is proposed to generate focused angle-beam bulk waves in thermoelastic regime. The arc-line-focused laser source is achieved by passing an expanded and collimated laser beam through a convex and axicon lens off-center. The distribution of the shear waves generated by the arc-line laser source were detected by a laser interferometer to evaluate the focal area. Finally, the measurement of artificial cracks at the bottom surface of aluminum specimen with using the focused angle-beam bulk waves is investigated by experiment.
Keywords
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Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Dongchi Yi, Cuixiang Pei, Tianhao Liu, Zhenmao Chen,