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New friction mechanisms revealed by ice crushing-friction tests on high-roughness surfaces

机译：高粗糙度表面的碎冰摩擦试验揭示了新的摩擦机理

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Ice crushing occurs to varying degrees in many situations including those that involve a sliding frictional component, such as in sports involving ice contact, ice interaction with bridges, piers, ship hulls, vehicle wheels, rock beds under glaciers and ice-on-ice sliding/crushing interaction within glaciers and extraterrestrial ice masses (on Saturn's moon Enceladus). Here results of ice crushing-friction experiments on high-roughness surfaces with regular arrays of small prominences are presented. Friction coefficients were extraordinarily low and were proportional to the ratio of the tangential sliding rate and the normal crushing rate. All of the friction coefficient variation was determined by the fluid dynamics of a slurry that flowed through channels that developed between leeward-facing facets of the prominences and the moving ice. The slurry originated from a highly lubricating self-generating squeeze film of ice particles and melt located between the encroaching intact ice and the surfaces. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.
机译：在许多情况下，碎冰的发生程度不同，包括涉及滑动摩擦分量的情况，例如在涉及冰接触的运动，与桥梁，码头，船体，车轮的冰相互作用，冰川下的岩床和冰上滑冰等运动中/压碎冰川和地球外冰块之间的相互作用（在土星的月亮土卫二上）。这里介绍了在高粗糙度表面上规则排列的小凸起的碎冰摩擦实验的结果。摩擦系数极低，并且与切向滑动速率和法向破碎速率之比成比例。所有摩擦系数的变化均由流过通道的浆液的流体动力学决定，该通道在面向下风的凸起小面和移动的冰之间形成。浆液来自高度润滑的冰粒自生挤压膜，并且位于侵入的完整冰块与表面之间，具有融化性。官方版权（C）2016，由Elsevier B.V.保留所有权利。

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