岩土力学2012，Vol.33Issue(6)：1613-1618,1639,7.
周期荷载作用下盐岩声发射特征试验研究
Experimental research on acoustic emission property of salt rock under cyclic loading
摘要
Abstract
The fatigue damage characteristic of salt rock is researched based on the acoustic emission (AE) technology by changing the upper limit stress, lower limit stress and loading rate. It is found that the AE count increases slowly with the stress increasing, but for sandstone, the AE count is intensive around the upper limit stress. The fatigue life of salt rock is more dependent on lower limit stress than sandstone. The higher the upper limit stress is, the more the AE count is, and the higher the loading rate is, the damage becomes much earlier. It is found that the AE cumulative curves are in keeping with strain curves which show that they can both show the fatigue damage process of salt rock. In the end, the constant amplitude load is instead by three-level variable amplitude load. The AE count becomes much more in the third level which shows that the variable amplitude load makes more serious fatigue damage in the salt rock than the constant amplitude load does.关键词
盐岩/疲劳损伤/循环载荷/声发射Key words
salt rock/ fatigue damage/ cyclic load/ acoustic emission分类
建筑与水利引用本文复制引用
任松,白月明,姜德义,杨春和,陈结..周期荷载作用下盐岩声发射特征试验研究[J].岩土力学,2012,33(6):1613-1618,1639,7.基金项目
国家重点基础研究发展计划(973)(No.2009CB724606) （973）
国家创新研究群体基金(No.50921063) （No.50921063）
国家自然科学基金资助项目(No.51074198) （No.51074198）
中央高校基本科研业务费(No.CDJZR10240017) （No.CDJZR10240017）
重庆市科委自然科学基金计划资助(No.2010BB6044). （No.2010BB6044）
