声发射
流体静力平衡
土壤水分
静水压力
微粒
剪切(地质)
环境科学
压力(语言学)
航程(航空)
压缩(物理)
材料科学
声学
岩土工程
土壤科学
机械
地质学
复合材料
物理
化学
有机化学
哲学
语言学
量子力学
作者
Robert M. Koerner,Arthur E. Lord
出处
期刊:Journal of the Acoustical Society of America
[Acoustical Society of America]
日期:1974-12-01
卷期号:56 (6): 1924-1927
被引量:11
摘要
Although acoustic emission techniques have been used in a wide variety of materials, scarcely any attention has been given to particulate systems such as soils. Yet, it is in such particulate materials where the concept of strain is quite fictitious and an alternate parameter is greatly needed. The results of this study suggest that acoustic emission might be such a parameter. Included herein is a laboratory study of the acoustic-emission response of a series of soil samples at different water contents and under different stress states. The stress states are hydrostatic compression and triaxial shear compression tests. In each type of test the soil samples are laterally confined by pressure which simulates the soil in its natural state. The results show that high confinement pressure and high water content both produce high levels of acoustic emission. The emissions begin instantaneously upon the application of the stress. In all cases, the emissions cease when the soil samples reach an equilibrium position under the applied stress state. Some insight as to the wide range of problems which might be solved using acoustic-emission techniques is also noted.
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