Abstract The tensile strength of ice subjected to dynamic loading constitutes many ice engineering applications such as ice blasting and hail-aircraft impact. In this study, the dynamic tensile behaviours of distilled-water and river-water ice were firstly investigated using the flattened Brazilian disc method with a modified split Hopkinson pressure bar system. Columnar freshwater ice samples were tested at strain rates ranging from 20 to 135 s−1 and temperatures ranging from −5 to −45 °C. The effects of impact velocity, loading rate, and ice sample thickness on the dynamic splitting tensile strength were also explored. Distilled-water ice specimens exhibited a higher indirect tensile strength than their river-water counterparts. The lower the temperature, the greater is the tensile strength, particularly in the case of distilled-water ice in the strain rate range of 89–135 s−1. The temperature had less effect on the dynamic tensile strength of distilled-water ice compared to the loading rate, and the specimen thickness had little effect on the dynamic indirect tensile strength. A large number of non-penetrating cracks were observed on the disc surface, indicating the inhomogeneous distribution of the tensile stress interpreted based on the 3D Brazilian disc theory. The closer the two end faces in the central cross section, the greater the tensile stress. The presence of single and multiple strip cracks on the splitting surface were discovered, possibly because of the instant expansion of the ice specimen and subsequent formation of mode-I cracks in the thickness direction.

中文翻译：

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使用改进的 SHPB 设置的蒸馏水和河水冰的动态分裂拉伸行为

摘要 动态载荷作用下冰的抗拉强度构成了许多冰工程应用，如爆冰和冰雹飞机撞击。在这项研究中，首先使用扁平巴西圆盘法和改进的分离式霍普金森压力杆系统研究了蒸馏水和河水冰的动态拉伸行为。柱状淡水冰样品在 20 至 135 s-1 的应变率和 -5 至 -45 °C 的温度范围内进行测试。还探讨了冲击速度、加载速率和冰样厚度对动态劈裂拉伸强度的影响。蒸馏水冰标本比河水冰标本表现出更高的间接拉伸强度。温度越低，抗拉强度越大，特别是在 89-135 s-1 应变率范围内的蒸馏水冰的情况下。与加载速率相比，温度对蒸馏水冰的动态拉伸强度的影响较小，试样厚度对动态间接拉伸强度的影响很小。在圆盘表面观察到大量非穿透性裂纹，表明基于 3D 巴西圆盘理论解释的拉应力分布不均匀。中心截面的两个端面越靠近，拉应力越大。发现劈裂面上存在单条和多条带状裂纹，可能是由于冰试样的瞬时膨胀和随后在厚度方向上形成I型裂纹。与加载速率相比，温度对蒸馏水冰的动态拉伸强度的影响较小，试样厚度对动态间接拉伸强度的影响很小。在圆盘表面观察到大量非穿透性裂纹，表明基于 3D 巴西圆盘理论解释的拉应力分布不均匀。中心截面的两个端面越靠近，拉应力越大。发现劈裂面上存在单条和多条带状裂纹，可能是由于冰试样的瞬时膨胀和随后在厚度方向上形成I型裂纹。与加载速率相比，温度对蒸馏水冰的动态拉伸强度的影响较小，试样厚度对动态间接拉伸强度的影响很小。在圆盘表面观察到大量非穿透性裂纹，表明基于 3D 巴西圆盘理论解释的拉应力分布不均匀。中心截面的两个端面越靠近，拉应力越大。发现劈裂面上存在单条和多条带状裂纹，可能是由于冰试样的瞬时膨胀和随后在厚度方向上形成I型裂纹。试样厚度对动态间接拉伸强度影响不大。在圆盘表面观察到大量非穿透性裂纹，表明基于 3D 巴西圆盘理论解释的拉应力分布不均匀。中心截面的两个端面越靠近，拉应力越大。发现劈裂面上存在单条和多条条状裂纹，可能是由于冰试样的瞬时膨胀和随后在厚度方向上形成I型裂纹。试样厚度对动态间接拉伸强度影响不大。在圆盘表面观察到大量非穿透性裂纹，表明基于 3D 巴西圆盘理论解释的拉应力分布不均匀。中心截面的两个端面越靠近，拉应力越大。发现劈裂面上存在单条和多条带状裂纹，可能是由于冰试样的瞬时膨胀和随后在厚度方向上形成I型裂纹。中心截面的两个端面越靠近，拉应力越大。发现劈裂面上存在单条和多条带状裂纹，可能是由于冰试样的瞬时膨胀和随后在厚度方向上形成I型裂纹。中心截面的两个端面越靠近，拉应力越大。发现劈裂面上存在单条和多条带状裂纹，可能是由于冰试样的瞬时膨胀和随后在厚度方向上形成I型裂纹。