MEASUREMENT AND PREDICTION OF TIME-DOMAIN WAVE-FORMS IN FIBER-REINFORCED LAMINATES

Accurate measurements have been made of the surface displacement produ ced by a laser-generated impulse in a cross-ply CFRP sample, whose lam inae are thick in comparison to the wavelength of the ultrasound. Theo retical predictions of the expected surface displacements resulting fr om an impulsive source were made using the global matrix method, which predicts the behavior of guided waves in laminated structures. Good a greement is seen between experiment and theory when the bandwidths ass umed by theory match those of the experiments. (C) 1995 Acoustical Soc iety of America.