海冰中浮冰断裂的相场模型

IF 4.4 2区地球科学 Q1 GEOGRAPHY, PHYSICAL

Cryosphere Pub Date : 2023-09-07 DOI:10.5194/tc-17-3883-2023

Huy-Hong-Quan Dinh, D. Giannakis, J. Slawinska, G. Stadler

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引用次数: 0

摘要

摘要我们建立了一个脆性断裂的相场模型来模拟海冰的断裂。相场允许通过使用能量泛函来建立裂缝的变分公式，该能量泛函将线性弹性能和建模裂缝能量成本的项相结合。我们研究了具有随机厚度变化的浮冰在边界力或位移作用下的断裂强度。我们的方法用厚度剖面的随机模型对再冻结裂纹或其他线性杂质进行建模。我们发现厚度变化的方向是影响浮冰强度的一个重要因素，并研究了导致破裂的临界应力的分布。讨论了离散元法（DEM）模拟和ICEX 2018活动现场数据的潜在应用。

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Phase-field models of floe fracture in sea ice

Abstract. We develop a phase-field model of brittle fracture to model fracture in sea ice floes. Phase fields allow for a variational formulation of fracture by using an energy functional that combines a linear elastic energy with a term modeling the energetic cost of fracture. We study the fracture strength of ice floes with stochastic thickness variations under boundary forcings or displacements. Our approach models refrozen cracks or other linear ice impurities with stochastic models for thickness profiles. We find that the orientation of thickness variations is an important factor for the strength of ice floes, and we study the distribution of critical stresses leading to fracture. Potential applications to discrete element method (DEM) simulations and field data from the ICEX 2018 campaign are discussed.

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来源期刊

Cryosphere GEOGRAPHY, PHYSICAL-GEOSCIENCES, MULTIDISCIPLINARY

CiteScore

8.70

自引率

17.30%

发文量

240

审稿时长

4-8 weeks

期刊介绍： The Cryosphere (TC) is a not-for-profit international scientific journal dedicated to the publication and discussion of research articles, short communications, and review papers on all aspects of frozen water and ground on Earth and on other planetary bodies. The main subject areas are the following: ice sheets and glaciers; planetary ice bodies; permafrost and seasonally frozen ground; seasonal snow cover; sea ice; river and lake ice; remote sensing, numerical modelling, in situ and laboratory studies of the above and including studies of the interaction of the cryosphere with the rest of the climate system.