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冰川冻土  1994 

-1℃下多晶冰在振动荷载下的蠕变

, PP. 259-264

Keywords: 多晶冰,振动荷载,蠕变

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Abstract:

应用人造多晶冰开展了正弦振动荷载和恒荷载压缩蠕变实验。振动应力的最大值为0.50MPa,最小值为0.34MPa,对时间的平均值为0.42MPa,实验频率在10-2-5Hz范围内变动。恒荷载实验的初始应力为0.42MPa,实验温度一律为-1℃。当应变很小时(低于~0.14%)样品在一个振动周期内发生的可恢复应变随应变的增加而增加。一个振动周期内可恢复应变的量级为10-4.振动荷载下样品最小平均应变率为恒荷载实验结果的1.4倍。为获得最小平均应变率所需的应变与恒荷载实验所得结果相同。

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