工程科学学报2017，Vol.39Issue(12)：1783-1790,8.DOI:10.13374/j.issn2095-9389.2017.12.002
基于SHPB的不同含水状态砂岩动态响应
Dynamic response of sandstones with different water contents based on SHPB
摘要
Abstract
To study the changing law of rock mechanics under different water conditions and to ensure that the water content was the sole factor, sandstone was used as the experimental material. Three different kinds of rock samples were prepared with different moisture states whose average saturation coefficients were 2. 82%, 52. 11%, 100%, i. e. , dry, semi-saturated, and saturated. The mechanical properties of the rocks were dynamically tested under the action of static load and eight kinds of impact energy. The experi-mental results reveal that under static load, compared with dry rock, the stress-strain curves of half-saturated and saturated rock sam-ples show decreasing peaks with increasing water content, and their compressive strengths decrease by 8. 12% and 19. 26%, respec-tively. Under dynamic loading, with increases in strain rate, the strengths of the three samples show a linear change in different de-grees, the stress-strain curves shift to the right, and the peak values increase. The dry and water-bearing rocks exhibit two obviously different trends in the unloading stage, especially in the second stage of unloading. Also, under the same impact energy, as the water content of the rock increases, the degree of fragmentation also increases.关键词
砂岩/含水状态/动态响应/试样制备/应力-应变曲线/峰值应力/破坏形态Key words
sandstones/water content state/dynamic response/sample preparation/stress- strain curve/peak stress/failure pattern分类
建筑与水利引用本文复制引用
褚夫蛟,刘敦文,陶明,彭怀德..基于SHPB的不同含水状态砂岩动态响应[J].工程科学学报,2017,39(12):1783-1790,8.基金项目
国家自然科学基金资助项目(51404303) （51404303）
山东省重点研发计划资助项目(2017CXGC1604) （2017CXGC1604）
