This work quantifies the increased temperature sensitivity of the constitutive behavior of ice with proximity to the melting point in terms of dislocation mechanics. An analysis of quasistatic and dynamic cyclic loading data for several ice types leads to the conclusion that high temperature (e.g. T ≥ −8°C) behavior is the result of a thermally induced increase in the number of mobile dislocations rather than an increase in the activation energy of dislocation glide or the introduction of a new deformation mechanism. The relationship between dislocation density and temperature is quantified and the model is shown to adequately represent the published minimum creep rate vs stress data for isotropic granular freshwater ice for −48 ≤ T ≤ −0.01°C.

中文翻译：

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冰蠕变的物理基础：高温状态

这项工作在位错力学方面量化了冰的本构行为在接近熔点时增加的温度敏感性。对几种冰类型的准静态和动态循环载荷数据的分析得出的结论是高温（例如吨≥ -8°C) 行为是热诱导的移动位错数量增加的结果，而不是位错滑动的活化能增加或引入新的变形机制的结果。位错密度和温度之间的关系被量化，并且该模型充分代表了已发表的各向同性粒状淡水冰 -48 ≤ 的最小蠕变速率与应力数据吨≤ -0.01°C。