岩石试样声发射的加载体刚度效应  

EFFECT OF STIFFNESS LOAD ON ROCK SAMPLES IN AE TEST

作　　者：陈忠辉[1] 唐春安[1] 傅宇方 

机构地区：[1]东北大学

出　　处：《煤炭学报》1996年第4期364-369,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目

摘　　要：基于加载体刚度对岩石试样产生声发射率时间序列的影响，利用统计细观损伤力学对加载体和岩石试样组成的简单力学模型产生的声发射进行了理论分析，推出了具有围压作用的应力－应变全过程关系，并利用计算机对全过程进行了仿真模拟．结果表明，加载体刚度的变化通过影响岩石试样变形速率的方式来参与影响岩石试样声发射率的时间序列．理论结果和实验值吻合较好．Theoretical analysis is made of a simple model for acoustic emission test, which consists of a loading body and rock sample by using statistic damage mechanics based on the effect of stiffness of load on time series of acoustic emission rate from the rock samples. A complete stress strain curve under confined pressure is deduced. And simulation of the whole process is also made by a computer. The conclusion is that the variation of stiffness of loading body will affect the deformation rate of rock sample which in turn affects the time series of AE rate of rock sample.The theoretical test data fit well with the test data.

关 键 词：声发射 刚度效应 岩石破裂 岩石试样 

分 类 号：TU456[建筑科学—岩土工程]