AE source location of unidirection GFRP

General source location method that use an arrival time differences among sensors is restricted to the composite material and the complex-shaped material. In this study, a bunch-type acoustic sensor composed of 6 pinducers was utilized to determine wave propagation direction and then to estimate source location of the unidirectional GFRP. For the purpose of the study, slowness curve for the material was obtained and made an assumption that the incident waves on pinducers are propagated as a plane wave. According to the results, measured propagation directions of the wave were coincide with theoretical background, however, it was a hassle to determine the source location exactly. But, it is expected that bunch-type sensor gives more accurate results for zone location than generally used acoustic sensors.