Effect of Surface Adhesion on the Rough Contact Response Near Complete Contact

IF 0.6 4区 工程技术 Q4 MECHANICS Mechanika Pub Date : 2022-08-30 DOI:10.5755/j02.mech.28978
Siyuan Zhang, Yanwei Liu
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引用次数: 0

Abstract

The adhesion phenomena between interfaces is widely investigated in engineering and scientific research. Due to the complexity of loading condition and surface topography, the traditional adhesive theory has many limitations. To better understand the adhesive properties of rough surfaces, we release the restrictions of JKR theory and propose a new adhesive model for single asperity. Initiated by this, a discrete rough surface contact model is presented, which extends the application scope of the traditional theory. First, we establish an elastic model by describing the gap between the interfaces accurately, so analytical solutions which are still valid for high contact pressure are proposed. Then, based on this, the exact adhesive solutions for different shapes of indenters are derived, which greatly improves the predicting accuracy of contact relationship and adhesion force. Finally, we use the results in the analysis of rough surface. The effect of both surface roughness and surface energy on the adhesive response of rough contact are studied in detail. The results show that adhesion is more easily to happen for smooth and geometrically continuous surfaces. The overall adhesion effect will be reduced in rough surface analysis with the increasing of surface roughness and the decreasing of surface energy. Our research sheds light on the understanding of the adhesion between solids and provides a theoretical guidance for the design of adhesion biomimetic materials and MEMS systems.
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接近完全接触时表面附着对粗接触响应的影响
界面之间的粘附现象在工程和科学研究中得到了广泛的研究。由于加载条件和表面形貌的复杂性,传统的粘接理论存在许多局限性。为了更好地理解粗糙表面的粘附特性,我们释放了JKR理论的限制,提出了一个新的单粗糙表面粘附模型。由此提出了一种离散粗糙面接触模型,扩展了传统理论的应用范围。首先,我们通过准确描述界面之间的间隙来建立弹性模型,从而提出了对高接触压力仍然有效的解析解。在此基础上,推导出了不同形状压头的精确粘着力解,大大提高了接触关系和粘着力的预测精度。最后,我们将这些结果用于粗糙表面的分析。详细研究了表面粗糙度和表面能对粗糙接触粘附响应的影响。结果表明,对于光滑且几何连续的表面,粘附更容易发生。在粗糙表面分析中,随着表面粗糙度的增加和表面能的降低,整体粘附效应会降低。我们的研究揭示了对固体之间粘附的理解,并为粘附仿生材料和MEMS系统的设计提供了理论指导。
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来源期刊
Mechanika
Mechanika 物理-力学
CiteScore
1.30
自引率
0.00%
发文量
50
审稿时长
3 months
期刊介绍: The journal is publishing scientific papers dealing with the following problems: Mechanics of Solid Bodies; Mechanics of Fluids and Gases; Dynamics of Mechanical Systems; Design and Optimization of Mechanical Systems; Mechanical Technologies.
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