Abstract Contact stiffness of regularly patterned multi-asperity interfaces
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Contact stiffness of regularly patterned multi-asperity interfaces

机译:规则图案化的多粗糙界面的接触刚度

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摘要

AbstractContact stiffness is a fundamental mechanical index of solid surfaces and relevant to a wide range of applications. Although the correlation between contact stiffness, contact size and load has long been explored for single-asperity contacts, our understanding of the contact stiffness of rough interfaces is less clear. In this work, the contact stiffness of hexagonally patterned multi-asperity interfaces is studied using a discrete asperity model. We confirm that the elastic interaction among asperities is critical in determining the mechanical behavior of rough contact interfaces. More importantly, in contrast to the common wisdom that the interplay of asperities is solely dictated by the inter-asperity spacing, we show that the number of asperities in contact (or equivalently, the apparent size of contact) also plays an indispensable role. Based on the theoretical analysis, we propose a new parameter for gauging the closeness of asperities. Our theoretical model is validated by a set of experiments. To facilitate the application of the discrete asperity model, we present a general equation for contact stiffness estimation of regularly rough interfaces, which is further proved to be applicable for interfaces with single-scale random roughness.
机译: 摘要 接触刚度是固体表面的基本机械指标,与广泛的应用相关。尽管单刚度接触已经探索了接触刚度,接触尺寸和负载之间的相关性,但我们对粗糙界面的接触刚度的了解尚不清楚。在这项工作中,使用离散粗糙模型研究了六边形图案的多粗糙界面的接触刚度。我们确认,粗糙之间的弹性相互作用对于确定粗糙接触界面的机械性能至关重要。更重要的是,与通常的观点认为,粗糙的相互作用仅由粗糙之间的间距决定,我们证明,接触中的粗糙数量(或等效的表观接触尺寸)也起着不可或缺的作用。在理论分析的基础上,我们提出了一种新的参数来衡量粗糙程度。我们的理论模型通过一组实验验证。为方便离散粗糙模型的应用,我们提出了一个规则的粗糙规则界面接触刚度估算的通用方程,进一步证明该方程适用于具有单尺度随机粗糙度的界面。

著录项

  • 来源
    《Journal of the Mechanics and Physics of Solids》 |2018年第2期|277-289|共13页
  • 作者单位

    AML, Department of Engineering Mechanics, Tsinghua University,Center for Nano and Micro Mechanics, Tsinghua University;

    AML, Department of Engineering Mechanics, Tsinghua University,Center for Nano and Micro Mechanics, Tsinghua University;

    AML, Department of Engineering Mechanics, Tsinghua University,Center for Nano and Micro Mechanics, Tsinghua University,State Key Laboratory of Tribology, Tsinghua University;

    State Key Laboratory of Tribology, Tsinghua University,Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University;

    School of Engineering, Brown University;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Contact stiffness; Contact mechanics; Multi-asperity contact; Continuous stiffness method; Elastic interaction;

    机译:接触刚度;接触力学;多粗糙接触;连续刚度法;弹性相互作用;
  • 入库时间 2022-08-18 02:59:42

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