A reinvestigation on combined dry and wet adhesive contact considering surface tension

IF 7.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Xinyao Zhu , Hongyu Wang , Lifeng Ma , Ganyun Huang , Jinju Chen , Wei Xu , Tianyan Liu
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Abstract

The present study theoretically explores combined dry and wet adhesive contact between a rigid sphere and elastic semi-half substrate, in which dry contact is encircled by liquid bridge. We consider threefold effects of liquid bridge on contact behavior, namely Laplace pressure induced by the curved surface of liquid meniscus, surface tension at the triple-phase junction and alternation of adhesion energy between solid surfaces ascribed to liquid immersion. A clear novelty in this study is the investigation on the effect of surface tension at the vapor-liquid-solid junction on the adhesive contact response, in contrast to previous studies. The model solution predicts that the contact behavior and adhesive strength are strongly dependent on surface wettability (manifested by contact angle), liquid volume and the contact system's rapidity in achieving thermodynamic equilibrium. It is found that the transition of the pull-off force is evidently different from Maugis-Dugdale model in terms of a couple of interesting characteristics. Moreover, it is unveiled that the jump instabilities and hysteresis of force-separation curves are highly affected by surface wettability and liquid volume. These theoretical results can not only shed lights on the mechanism of liquid-mediated adhesion employed by animals and plants, but also provide us inspiration for development of biomimetic adhesive devices.

Abstract Image

考虑表面张力的干湿胶粘剂组合接触再研究
本研究从理论上探讨了刚性球体与弹性半基体之间的干湿结合粘合接触,其中干接触被液桥包围。我们考虑了液桥对接触行为的三重影响,即液体半月板弯曲表面引起的拉普拉斯压力、三相交界处的表面张力以及液体浸入引起的固体表面间粘附能的交替。与之前的研究不同,本研究的一个明显新颖之处在于研究了蒸汽-液体-固体交界处的表面张力对粘合接触反应的影响。根据模型求解预测,接触行为和粘合强度与表面润湿性(以接触角表示)、液体体积和接触系统达到热力学平衡的速度密切相关。研究发现,拉脱力的转变与 Maugis-Dugdale 模型有明显不同,这体现在几个有趣的特征上。此外,研究还发现力分离曲线的跃迁不稳定性和滞后性受表面润湿性和液体体积的影响很大。这些理论结果不仅可以揭示动植物利用液体介导粘附的机理,还能为开发仿生物粘附装置提供启示。
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来源期刊
International Journal of Mechanical Sciences
International Journal of Mechanical Sciences 工程技术-工程:机械
CiteScore
12.80
自引率
17.80%
发文量
769
审稿时长
19 days
期刊介绍: The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.
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