岩石受载记忆的声发射实验研究

在刚性试验机上，对花岗岩试样进行了单轴循环加载试验，分析了试验过程中试样的状态参数、物性参数及声发射（AE）信息的变化规律，得到了四个不同循环加载阶段应力、应变及损伤因子与AE事件累计数的关系，并以Fencity比评判各参数对Kaiscr效应值记忆的准确性和稳定性。结果表明：岩石试样的物性参数（应变、损伤因子）对Kaiser效应值记忆的准确程度和稳定程度均好于状态参数（应力），岩石材料在受压变形过程中，“生的塑性变形是应力记忆能力出现Felicity效应的主要原因。

Research on ability of memorizing previous load by AE testing in rock

Experiments of uniaxial cyclic loading on granite samples were carried out on stiffness test machine,and the status parameters,physical parameters and acoustic emission(AE)signals were obtained.The relations among AE counts,AE rates and stress,strain,damage factor on different level loading were analyzed in detail,and the ability of different parameters to memorize the value of Kaiser effect were estimated by Felicity ratio.The results show,the veracity and stability of memorial ability of physical parameters(strain,damage factor)are better than that of status parameters(stress).There is plastic deformation when rock material suffering compression,and residual deformation remains even if the previous loading is unloaded entirely,which was the reason why Felicity effect occurred in memorial ability of stress.