Tensile Properties of Sea Ice Grown in a Confined System
Tensile Properties of Sea Ice Grown in a Confined System
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受限系统中生长的海冰的拉伸特性
DOI：
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发表时间：
1967
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影响因子：
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通讯作者：
J. Dykins
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作者：
J. Dykins
在封闭系统中生长的海冰的盐度、密度和岩相结构可以与在自然环境中形成的海冰的特征密切相关。这一观察是针对44厘米厚的冰进行的。的拉伸强度被认为是更依赖于晶粒和亚晶粒结构的取向比它是在温度上。冰在-4 °C时的平均水平拉伸强度为41 psi（2.9 kg/cm 2）（未公布的数据），在-10 °C和-20 °C时均为67 psi（4.7 kg/cm 2），在-27 °C时为78 psi（5.5 kg/cm 2）。平均垂直拉伸强度在_4 ° C下为128 psi（9.0 kg/cm 2）（未公布数据），在-10 °C下为152 psi（10.7 kg/cm 2），在-20 °C下为163 psi（11.5 kg/cm 2），在-27 °C下为208 psi（14.6 kg/cm 2）。晶粒（晶体）尺寸对强度影响不大，但晶粒和亚晶（枝晶）结构的取向与应力取向的关系有明显的影响。实验室生长的冰的水平拉伸强度与天然海冰的弯曲强度相当好。未对垂直强度进行比较。
The salinity, density, and petrographic structure of sea ice grown in a confined system can be closely identified with the characteristics of sea ice formed in a natural environment. This observation was made for ice 44 cm thick. The tensile strength was found to be more dependent on the orientation of the grain and subgrain structure than it was on temperature. The ice had a mean horizontal tensile strength of 41 psi (2.9 kg/cm2) at -4°C (unpublished data), of 67 psi (4.7 kg/cm2) at both -10 and -20°C and of 78 psi (5.5kg/cm2) at -27°C. The mean vertical tensile strength was 128 psi (9.0 kg/cm2) at _4°C (unpublished data), 152 psi (10.7 kg/cm2) at -10°C, 163 psi (11.5 kg/cm2) at -20°C, and 208 psi (14.6 kg/cm2) at -27"C. The grain (crystal) size had little effect on the strength, however, the orientation of the grain and subgrain (dendrite) structure in relation to the stress orientation had an appreciable effect. The horizontal tensile strength of the laboratorygrown ice compares reasonably well with the flexural strength reported for natural sea ice. No comparison was made for the vertical strength.