Laser-Ultrasonic Investigation on Lamb Waves in Two-Dimensional Phononic Crystal Plates
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In this paper, laser-ultrasonic non-destructive testing is used to investigate the propagation of Lamb waves in two-dimensional phononic crystal plates. The bandgaps are experimentally observed for low-order Lamb wave modes. The influence of crucial parameters such as the periodical arrangement of scatterers on bandgaps is discussed in detail. The finite element simulations further agree well with the results of the laser-ultrasonic investigation.
Keywords2D phononic crystal plates Bandgaps Laser-ultrasonic non-destructive Testing
This work was supported by the National Basic Research Program of China (2012CB921504), the National Natural Science Foundation of China (11074124, 11104139, 10904052, and 11204145), Jiangsu Provincial Natural Science Foundation (BK2011542), and Science and Technology Program of Nantong city (BK2012045).