【摘要】 对平均晶粒约为3mm,密度为900kg/m~3的人造多晶冰在-1℃下进行了单轴正弦振动压缩实验,包括静压缩实验,研究频率、振幅对变形的影响。区分出3种过程:脆性破坏,韧—脆性过程和韧性蠕变。在为O.42～1.35MPa时,振动荷载下的出现时间与静载下的无明显差别,但数值略有增加,特别在较大时。发现和较大时,明显地随荷载振幅的增加而增加。更多还原

【Abstract】 Laboratory prepared polycrystalline ice, with mean grain size of 3 mm and density of 900 kg/ m3, was tested under uniaxial compression with sine cyclic and static loadings to study the influence of frequency and amplitude on ice deformation. Three processes were distinguished, i.e., brittle rupture, ductile-brittle process and ductile creep. The difference in εmin is insignificant between cyclic and static loading as σ ranging from 0.42 to 1.35 MPa. But it seems εmin increasing under cyclic loading, particularly as σ increasing. It is found that εmin significantly increases with amplitude at f=0.1 Hz and a greater σ.更多还原