Fluid wetting infiltration characteristics and mechanical driving mechanism in rough rubber‐glass contact interface

Abstract

Fluid wetting infiltration in rough rubber contact interface has a directly effect on mechanical lubrication and seal. To clarify its mechanism, contact property and fluid wetting infiltration process with time in rough rubber-glass contact interface were obtained with an in situ observation instrument. The effect of wetting on the fluid infiltration area ratio at interface was analysed. Experimental results indicated that fluid wetting infiltration at interface was more channels. The comparison of the capillary pressure with viscous drag force was the fundamental evaluation index for fluid infiltration at interface. In high-contact area ratio zone, the size of microchannels was small, and the capillary pressure was more likely to overcome the viscous drag force of solidliquid interface. But in low-contact area ratio zone, the situation was just the opposite. The microchannel size and surface tension of fluid were the effect factors of capillary pressure. K E Y W O R D Sfluid wetting infiltration, rough rubber-glass contact interface, lubrication and seal, capillary pressure, microchannels

Study on a New Static Sealing Method and Sealing Performance Evaluation Model for PEMFC

“…Pang, M.H. et al observed the liquid infiltration processes between rubber elastomers in situ and obtained the relationship between stress and the actual contact area ratio r, which shows a power function law [34]. The fitting relationship could be described as Equation (3).…”

“…In the compression experiments of Pang, M.H. et al, the process of liquid infiltration between the modified sealed surfaces was observed in situ [34]. Firstly, initial compressive stress σ 0 was applied in sealing pairs, and the initial actual contact area ratio r 0 could be obtained.…”

Systematic investigation on the swelling behaviors of acrylonitrile‐butadiene rubber via solubility parameter and Flory‐Huggins interaction parameter

“…9,10 Rubber products used in oil industry appear severe changes in mechanical properties under the conditions of continuous rotation, shear stress and extrusion stress. [11][12][13] In practice, the swelling process can be promoted by the aggressive media, extraction of small additives and chemical reactions. Therefore, prediction for the swelling behavior of NBR based rubber products in various fuels, like biodiesel, is of prime importance.…”

Development of a mini-tribometer for in-situ observation of subsurface and the corresponding experiments

“…A reciprocating tribometer was developed for in-situ observation of the transfer process during friction of PTFE composites (Ye, 2014). And an in-situ observation instrument was also created to study Fluid wetting infiltration characteristics and mechanical driving mechanism in rough rubber-glass contact interface (Pang et al , 2020). A modified scratch stage and optical setup of a conventional micro-scratch tester was used to in-situ real-time analyze the influence of internal stress in optical thin films on their failure modes (Poirie et al , 2017).…”