Fig. S5b from Tensile fracture of a single crack in first-year sea ice

The breakup of sea ice in the Arctic and Antarctic has been studied during three field trips in the spring of 1993 at Resolute, N.W.T. and the fall of 2001 and 2004 on McMurdo Sound via <i>in situ</i> cyclic loading and fracture experiments. In this paper, the back-calculated fracture information necessary to the specification of an accurate viscoelastic fictitious (cohesive) crack model is presented. In particular, the changing shape of the stress separation curve with varying conditions and loading scenarios is revealed.This article is part of the theme issue ‘Modelling of sea-ice phenomena’.

本研究借助1993年春季于加拿大西北地区（N.W.T.）雷索卢特、2001年与2004年秋季于麦克默多湾（McMurdo Sound）开展的三次野外考察所获取的原位（in situ）循环加载与断裂实验数据，针对南北极海冰的破裂瓦解过程展开分析。本文给出了构建精准粘弹性虚拟（内聚）裂纹模型（viscoelastic fictitious (cohesive) crack model）所需的反演断裂信息。特别地，本文揭示了不同条件与加载工况下应力分离曲线的形态变化规律。本文属于“海冰现象建模”主题特刊。