Abstract：To investigate the acoustic emission (AE) spacetime evolution rules during deformation and failure process of salt rock under different strain rates, the uniaxial compressive tests under different loads for salt rock were carried out on a servocontrolled test machine of RMT150B, and AE detections were conducted at the same time. The results show that the AE temporal and spatial evolution trends of salt rock under two different strain rates are roughly the same. Compression and elasticity stage times are very short. At the elastic stage, the numbers of locating points present linear growth. At the plastic stage, the numbers of locating points increase rapidly with subsequent decrease. At the failure stage, there are still considerable number of locating points although stress is reduced. The strain rate has great effect on the spacetime evalution of salt rock.The bigger the strain rate is, the less the locating points are. The strain rate has slight effect on the peak strength of uniaxial compression, but has great influence on deformation. The plastic deformation is large at low strain rate and small at high strain rate. Near to the peak strength, the plastic deformation characteristics are more obvious when the strain rate is smaller.
王伟超, 刘希亮, 张五交. 不同应变率下的盐岩损伤声发射时空演化[J]. 江苏大学学报（自然科学版）, 2015, 36(4): 491-496.
WANG Wei-Chao, LIU Xi-Liang, ZHANG Wu-Jiao. Spacetime evolution rules of acoustic emission locations of salt rock under different strain rate[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2015, 36(4): 491-496.
2015, Vol. 36 
