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arXiv 2107.11296cond-mat.softcond-mat.mtrl-sci
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柱状图案基底密度对接触力学的影响:从顶部到混合接触的过渡及详细的压力场描述

Effect of the density of pillar-patterned substrates on the contact mechanics: Transition from top to mixed contact with a detailed pressure-field description

Rene Ledesma-Alonso, Elie Raphael, Frederic Restagno, Christophe Poulard

摘要:

当球面透镜与周期性图案化衬底彼此压靠时,观察到它们之间的不同接触状态。当仅最高基底部分接触透镜时发生顶部接触,而混合接触意味着最高和最低基底部分都与透镜接触。在本文中,我们研究了基板的图案密度,以及它的物理特性和透镜的物理特性,决定了从顶部接触到混合接触的过渡。实验和数值模拟已经进行,作为补充的方法来获得数据,并已开发的理论分析,以获得洞察的物理参数的接触过渡的效果。因此,提出了一个相图,在负载和接触半径方面,结合了三种方法(实验,数值和理论)的观察结果,揭示了三种接触机制的边界:(1)确定性驱动的接触,(2)顶部接触,和(3)混合接触。

英文摘要:

Different contact regimes between a spherical lens and a periodically patterned substrate are observed, when they are pressed against each other. Top contact occurs when only the highest substrate sections touch the lens, whereas mixed contact implies that both the highest and the lowest substrate sections come into contact with the lens. In this paper, we study how the pattern density of the substrate, along with its physical properties and those of the lens, determine the transition from top contact to mixed contact. Experiments and numerical simulations had been performed, as complementary approaches to obtain data, and a theoretical analysis has been developed to gain insight on the effect of the physical parameters on the contact transition. As a result, a phase diagram is presented, in terms of the load and the contact radius, that combines the observations of the three approaches (experimental, numerical, and theoretical), unveiling the boundaries of three contact regimes: (1) deterministic-driven contact, (2) top contact, and (3) mixed contact.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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