天然淡水冰单轴压缩强度及其温度和应变率效应

本文报道了在不同温度和不同应变率下天然淡水冰单轴压缩强度的实验结果。指出S—l型柱状晶粒冰的压缩强度随着温度的降低而增加,极限压缩强度在应变率为10~(-4)S(-1)时有一个最大值。本实验的应变率范围是10~(-5)—10~0s~(-1)。10~(-1)—10~0s~(-1)的应变率范围是在冲击速度lm/s左右的实验条件下获得的,这个速度接近于浮冰与海上结构物相撞的情况。以本实验为基础,有希望发展对海冰的实验技术。

Effects of Temperature and Strain Rate on Uniaxial Compressive Strength of Natural Fresh Water Ice

Experimental results of compressive strength of natural fresh water ice at different temperatures and strain rates are reported in this paper , It is shown that compressive strength of columnar-grained S-Itype ice with loads applied perpendicular to the length of the columns increases with decreasing temperature .the range of avderage actual strain rate covers from 10-5to 100s-1.the strain rate of 10-1 -100s-1 in these experiments are obtained with the impact velocity of m/ sor so which is close th the impacting velocity of sea ice on marine structures, based on thdis study itis hopefusl to develop the experimental tdechnique for sea ice .