Experimental analysis of interface contact behavior using a novel image processing method

doi:10.1088/1674-1056/abd696

中国物理B ›› 2021, Vol. 30 ›› Issue (5): 54601-054601.doi: 10.1088/1674-1056/abd696

Experimental analysis of interface contact behavior using a novel image processing method

Jingyu Han(韩靖宇), Zhijun Luo(罗治军), Yuling Zhang(张玉玲), and Shaoze Yan(阎绍泽)^†

State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

收稿日期:2020-10-26 修回日期:2020-12-15 接受日期:2020-12-24 出版日期:2021-05-14 发布日期:2021-05-14
通讯作者: Shaoze Yan E-mail:yansz@mail.tsinghua.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11872033) and the Beijing Natural Science Foundation, China (Grant No. 3172017).

Experimental analysis of interface contact behavior using a novel image processing method

Jingyu Han(韩靖宇), Zhijun Luo(罗治军), Yuling Zhang(张玉玲), and Shaoze Yan(阎绍泽)^†

State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

Received:2020-10-26 Revised:2020-12-15 Accepted:2020-12-24 Online:2021-05-14 Published:2021-05-14
Contact: Shaoze Yan E-mail:yansz@mail.tsinghua.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11872033) and the Beijing Natural Science Foundation, China (Grant No. 3172017).

摘要/Abstract

摘要： The spatial and temporal evolution of real contact area of contact interface with loads is a challenge. It is generally believed that there is a positive linear correlation between real contact area and normal load. However, with the development of measuring instruments and methods, some scholars have found that the growth rate of real contact area will slow down with the increase of normal load under certain conditions, such as large-scale interface contact with small roughness surface, which is called the nonlinear phenomenon of real contact area. At present, there is no unified conclusion on the explanation of this phenomenon. We set up an experimental apparatus based on the total reflection principle to verify this phenomenon and analyze its mechanism. An image processing method is proposed, which can be used to quantitative analysis micro contact behaviors on macro contact phenomenon. The weighted superposition method is used to identify micro contact spots, to calculate the real contact area, and the color superimposed image is used to identify micro contact behaviors. Based on this method, the spatiotemporal evolution mechanism of real contact area nonlinear phenomena is quantitatively analyzed. Furthermore, the influence of nonlinear phenomenon of real contact area on the whole loading and unloading process is analyzed experimentally. It is found that the effects of fluid between contact interface, normal load amplitude and initial contact state on contact behavior cannot be ignored in large-scale interface contact with small roughness surface.

关键词: real contact area, total reflection method, micro-contact spots, interface contact, experimental analysis

Abstract: The spatial and temporal evolution of real contact area of contact interface with loads is a challenge. It is generally believed that there is a positive linear correlation between real contact area and normal load. However, with the development of measuring instruments and methods, some scholars have found that the growth rate of real contact area will slow down with the increase of normal load under certain conditions, such as large-scale interface contact with small roughness surface, which is called the nonlinear phenomenon of real contact area. At present, there is no unified conclusion on the explanation of this phenomenon. We set up an experimental apparatus based on the total reflection principle to verify this phenomenon and analyze its mechanism. An image processing method is proposed, which can be used to quantitative analysis micro contact behaviors on macro contact phenomenon. The weighted superposition method is used to identify micro contact spots, to calculate the real contact area, and the color superimposed image is used to identify micro contact behaviors. Based on this method, the spatiotemporal evolution mechanism of real contact area nonlinear phenomena is quantitatively analyzed. Furthermore, the influence of nonlinear phenomenon of real contact area on the whole loading and unloading process is analyzed experimentally. It is found that the effects of fluid between contact interface, normal load amplitude and initial contact state on contact behavior cannot be ignored in large-scale interface contact with small roughness surface.

Key words: real contact area, total reflection method, micro-contact spots, interface contact, experimental analysis

中图分类号: (Tribology and mechanical contacts)

46.55.+d

42.30.Va (Image forming and processing) 78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))

Jingyu Han(韩靖宇), Zhijun Luo(罗治军), Yuling Zhang(张玉玲), and Shaoze Yan(阎绍泽). Experimental analysis of interface contact behavior using a novel image processing method[J]. 中国物理B, 2021, 30(5): 54601-054601.

Jingyu Han(韩靖宇), Zhijun Luo(罗治军), Yuling Zhang(张玉玲), and Shaoze Yan(阎绍泽). Experimental analysis of interface contact behavior using a novel image processing method[J]. Chin. Phys. B, 2021, 30(5): 54601-054601.

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Experimental analysis of interface contact behavior using a novel image processing method

Experimental analysis of interface contact behavior using a novel image processing method

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