Acoustic emission source location of saturated dense coral sand in triaxial compression tests

抄録

Since acoustic emission(AE)could be produced because of sand particle crushing and/or sliding, more and more researchers have been exploring the potential of applying AE technique to localize such interactions on sand. In this paper, drained triaxial compression tests incorporating with an array of eight AE sensors were conducted on saturated dense coral sand under different constant loading rates, aimed at locating the shear band by AE source location technique. Like the back analysis of earthquake epicenter, the source location and the generation time of the AE event were calculated based on the principle of Time Difference of Arrival (TDOA) and an assumed constant wave velocity of 1500 m/s. Results showed that the AE sources were concentrated into an inclined band in the post-peak region, which was consistent with the appearance of the shear band developed in the specimens.