BEHAVIOR OF SAND PARTICLES DETECTED FROM ACOUSTIC EMISSION

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  • AEからみた砂の粒子挙動
  • AE カラ ミタ スナ ノ リュウシ キョドウ

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Abstract

In order to detect the microscopic behavior of sand particles, acoustic emission emitted from sand under various shear stress levels was measured. From these experiments the following conclusions were obtained. (1) Acoustic emission and stress-strain relationships under two types of repetitional shearing tests were compared. One was the ordinary repetitional shear test. The other was the repetitional shear test on the sand which had been subjected to the repetitional shear along the direction perpendicular to the shear direction. Each compared characteristic was found to be different. (2) Kaiser effect of sand was realized according as the sand became elastic. (3) From the pattern of relationships between applied stress and number of acoustic emission three states of sand-elastic, elastoplastic and failure states-were classfied.

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