摘要
为研究影响海冰单轴压缩强度的因素,在渤海辽河口附近海域采集冰坯,加工成方柱状冰样.在试验温度分别为-3℃,-5℃,-7℃,-10℃和-15℃下,对225个冰样沿平行和垂直自然冰表面方向进行加载.研究试样温度,加载方向,应变速率和孔隙率对海冰单轴压缩强度的影响.试验结果表明:海冰单轴强度随试样温度的降低而增加;垂直方向冰样的峰值强度高于水平方向,海冰表现为各向异性.利用试验结果建立了韧性区内海冰单轴压缩强度与应变速率和孔隙率的统计关系.
In order to study the influencing factor of uniaxial compressive strength of sea ice,the ice billet is collected in the estuary of Liaohe River in the Bohai Sea and processed into225 columnar samples.The test temperature is-3℃,-5℃,-7 ℃,-10℃,-15℃ and the loading direction is parallel and vertical to the ice surface.This test analyses the effect of temperature,loading direction,strain rate and porosity of the samples on the strength.The conclusions are as follows：The uniaxial compressive strength of sea ice declines along with temperature rising.The peak strength of samples in vertical direction is larger than the strength of samples in parallel,which is the feature of anisotropy.The results establish the statistical relation between strength,porosity and strain rate in ductile zone.
出处
《数学的实践与认识》
CSCD
北大核心
2014年第24期157-162,共6页
Mathematics in Practice and Theory
基金
国家自然科学基金(51221961
41376186)
国家海洋局海洋公益性行业科研专项(201105016)
关键词
海冰
单轴压缩强度
温度
应变速率
孔隙率
sea ice
uniaxial compressive strength
temperature
strain rate
porosity
