MEASUREMENT OF RAYLEIGH WAVE ATTENUATION IN GRANITE USING LASER ULTRASONICS

摘要

This research demonstrates the effectiveness of using laser ultrasonic techniques to quantify attenuation losses in heterogeneous materials. By using this state-of-the-art technology, it is possible to experimentally measure the frequency-dependent material attenuation coefficient, α, over a broad frequency bandwidth. It is critical to note that these experimental measurements are only possible because of the high fidelity, unbiased, broadband, point source/point receiver and non-contact nature of laser ultrasonics.