Title :
Laser-generated ultrasonic guided waves in fiber-reinforced plates-theory and experiment
Author :
Scudder, Lawrence P. ; Hutchins, David A. ; Guo, Ningqun
Author_Institution :
Dept. of Eng., Warwick Univ., Coventry, UK
Abstract :
A pulsed laser source and a capacitance transducer detector have been used to record the propagation of guided waves in carbon fiber-reinforced polymer composite laminates. Despite the multimode nature of the recorded data, it is shown that the phase velocity dispersion curve of the a/sub 0/ mode can be extracted readily from the waveforms. Experimental dispersion curves have been compared to phase velocity predictions from a global matrix theory. Reasonable correlation between theory and experiment is obtained, demonstrating the validity of the calculations and experimental method.
Keywords :
acoustic waveguides; carbon fibre reinforced plastics; laminates; photoacoustic effect; ultrasonic dispersion; ultrasonic materials testing; ultrasonic propagation; capacitance transducer detector; fiber-reinforced polymer composite laminates; global matrix theory; laser-generated ultrasonic guided waves; phase velocity dispersion curve; pulsed laser source; thin isotropic plate propagation; Anisotropic magnetoresistance; Cutoff frequency; Fiber lasers; Laser modes; Laser theory; Optical fiber theory; Optical propagation; Optical pulse generation; Optical pulses; Polymers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
