南水北调与水利科技2016，Vol.14Issue(6)：62-67,140,7.DOI:10.13476/j.cnki.nsbdqk.2016.06.0011
大颗粒柱状淡水冰无侧限剪切强度及其影响因素
Study on the unconfined shear strength of large columnar-grained freshwater ice and its influential factors
摘要
Abstract
Considering that the unconfined shear strength of large columnar‐grained freshwater ice is associated with loading directions , loading strain rate and temperature ,we conducted the unconfined shear test at the temperature of -0 .5 ℃ ,-2 ℃ ,-5 ℃ ,-10 ℃ and strain rates of 5 .0 × 10-5/s to 5 .0 × 10-2/s .Two loading modes were used in our test :vertical loading (the loading force was parallel to the crystal growth direction) and horizontal loading (the loading force was perpendicular to the crystal growth direction ) .The ex‐perimental results showed that (a) the shear strength increased with the decrease of temperature and strain rate under the given experimental conditions ;(b) comparison of shear strength under the two loading directions showed that the anisotropy of me‐chanical properties was more obvious at the temperature of -5 ℃ and -10 ℃ ,and the shear strength under the two loading di‐rections had no visible distinction at the temperature of -0 .5 ℃ and -2 ℃ ;and (c) there was no significant correlation be‐tween the shear strength and gas bubble content when the gas bubble content was less than 8 .65% .关键词
剪切强度/温度/应变速率/各向异性/淡水冰Key words
shear strength/temperature/strain rate/anisotropy/freshwater ice分类
天文与地球科学引用本文复制引用
韩红卫,黄文峰,贾青,李志军..大颗粒柱状淡水冰无侧限剪切强度及其影响因素[J].南水北调与水利科技,2016,14(6):62-67,140,7.基金项目
国家自然科学基金项目（51579028；41402203；41376186） FundNational Natural Science Foundation of China （）
