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首页> 外文期刊>Journal of offshore mechanics and arctic engineering >Uniaxial constant compressive stress creep tests on sea ice
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Uniaxial constant compressive stress creep tests on sea ice

机译：海冰单轴恒定压应力蠕变试验

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摘要

First-year columnar- grained sea ice from Resolute Passage (74° 42' N, 94° 50' W), off Barrow Strait in the Canadian High Arctic, was tested under constant uniaxial compressive stress applied normal to the length of the columns. Creep tests were performed at 263 K, 253 K, and 243 K in the stress range of 0.7 to 2.5 MPa, using prismatic samples with dimensions of 50 mm ×100 mm / 250 mm. Because three-dimensional creep data are extremely useful for developing constitutive equations, axial strain was measured in conjunction with the measurements of two lateral strains and acoustic emissions. The deformations were measured using displacement gages mounted on the samples. A description of the experimental procedures and the observations are presented here. One-to-one correspondence has been obtained between the present results on the dependence of minimum creep rate on stress and previous data on the dependence of uniaxial compressive strength on strain rate under constant strain rate. The strain-rate sensitivity of compressive strength can, therefore, be obtained from creep tests which can be performed by using simple dead-load test systems.
机译：来自加拿大高北极地区巴罗海峡的Resolute Passage（74°42'N，94°50'W）的第一年柱状颗粒海冰在垂直于柱长的恒定单轴压缩应力下进行了测试。使用尺寸为50 mm×100 mm / 250 mm的棱柱形样品在263 K，253 K和243 K的应力范围为0.7至2.5 MPa下进行了蠕变测试。由于三维蠕变数据对于建立本构方程非常有用，因此轴向应变是与两个横向应变和声发射一起进行测量的。使用安装在样品上的位移计测量变形。这里介绍了实验步骤和观察结果。在最小蠕变速率对应力的依赖性的当前结果与在恒定应变速率下单轴抗压强度对应变速率的依赖性的先前数据之间已经获得了一对一的对应关系。因此，可以通过蠕变试验获得抗压强度的应变率敏感性，而蠕变试验可以通过使用简单的静载试验系统进行。

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