Abstract
Acoustic emission from the shear flow of granular materials was observed during a direct shear test. Because of this, a method of predicting the failure of granular materials by emission count was established. Acoustic emission from the granular bed occurs due to the rupture layer formed periodically in the bed. The correlation between the emission count rate and the vertical stress in a granular bed was obtained. The emission count rate was also related closely to shear speed. The information on the failure of the granular bed was obtained by the parameters of acoustic emission.
