A Surface Connectivity-Based Approach for Leakage Channel Prediction in Static Sealing Interface

Shao, Yiping; Yin, Yuhua; Du, Shichang; Xi, Lifeng

doi:10.1115/1.4043123

Cited by 20 publications

(3 citation statements)

References 31 publications

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“…21,22 For example, He et al 23 proposed a novel strategy to detect road crack images and enhance the connectivity of fractures by using mathematical morphology. Shao et al 24 developed a surface connectivity-based strategy to evaluate and predict the leakage feature of a static contacting interface. It is worth noting that surface connectivity, as a method of 3D morphological characterization, is also important for exploring the functional properties of surfaces.…”

Section: Introductionmentioning

confidence: 99%

Synergetic effect of surface connectivity and functional parameters on the friction characteristics of a sliding contact interface

Liu

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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The characteristics of surface morphology markedly affect the tribological properties of contact interface such as lubrication and seal performance. In present work, the synergetic effect of surface connectivity and some three-dimensional topography parameters (ISO 25178) on the friction characteristics of a sliding contact interface, based on mathematical morphology and reciprocating linear tribotesting, is explored. The results indicate that the friction properties of sliding contact interface was significantly affected by the variation of surface connectivity. The increase in connectivity index would improve the relative contact area on the isotropic surfaces and affect the distribution and storage characteristics of the fluid, while this enhancement would be blocked on the anisotropic surface and the variation of connectivity index is obviously nonlinear with a shocking feature. The friction tests confirm that the friction coefficient of sliding contact interface decreases with the increasing surface connectivity index, which is mainly related to the enhancement of lubricant storage and flow in each void region and improving the lubrication behavior. Furthermore, the same variation law is applicable to the relationship between the functional morphology parameters and the friction property. The increasing Vvv and Sku, would contribute to a lower friction coefficient at the interface. Our work provides deep insights into regulating the tribological property of contact interfaces through surface topography control.

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Section: Introductionmentioning

confidence: 99%

Synergetic effect of surface connectivity and functional parameters on the friction characteristics of a sliding contact interface

Liu

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…e metal-to-metal seal is performed by a direct-metal/ metal-tight contact of rough surfaces as shown in Figure 1. Although it is simple in structure, the sealing behavior of a metal-to-metal seal is a ected by a variety of factors [7][8][9][10][11], among which the surface topography, which usually has a microstructure given by machining processes, is thought to be one of the most important factors [12][13][14]. Clearly, engineering materials are known to have rough surfaces, and the full control of surface topography at all scales during manufacturing processes is still out of reach [9].…”

Section: Introductionmentioning

confidence: 99%

A Fractal Contact Model for Rough Surfaces considering the Variation of Critical Asperity Levels

Liu

Guo

Chen

et al. 2022

Advances in Materials Science and Engineering

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A contact model for rough surfaces based on the fractal theory is proposed in the present work. Firstly, the deformation of the material is divided into four stages: elastic deformation, the first elastoplastic deformation, the second elastoplastic deformation, and full plastic deformation. And the variation of material hardness is considered when analyzing the contact characteristics of a single asperity within the first and second elastoplastic deformation stages. Secondly, the size distribution function of contact spots at different frequency levels is derived. And the expressions of asperity critical frequency levels are rederived. Lastly, the feasibility and credibility of the proposed model are verified by comparison with other contact models and experimental data. The results show that when the variation of the material hardness is considered, the contact area of a single asperity in the first elastoplastic deformation stage becomes larger, while the contact area of a single asperity in the second elastoplastic deformation stage becomes smaller. Moreover, the critical asperity frequency levels of the rough surface are not constant, but the variables are related to the total real contact area of the rough surface and decrease as the real contact area increases. The proposed model is a modification and improvement of the existing fractal contact models, which can lead to a more accurate relationship between the contact load and the total real contact area of the rough surface.

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“…Wang et al [12] analyzed the mechanism of static metal sealing, determined the critical condition of the sealing performance, and established the method of calculating the contact pressure of the sealing surface. Shao et al [13] proposed a static seal interface leakage channel prediction method, which included contact generation, leakage parameter definition, and channel prediction, and the experimental results showed that this method could evaluate the static sealing performance well. Lutkiewicz et al [14] proposed a method for evaluating the effectiveness of bolted joint seals based on leakage rate calculation, which took the contact stress graphs, material characteristics, and surface roughness as input and obtained the leakage rate evaluation value.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Sealing and Leakage Performance of the Subsea Collet Connector with Lens-Type Sealing Structure

Yun

Wang

Yan

et al. 2020

JMSE

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The contact mechanics model of the metal lens-type sealing gasket is established on the basis of Hertz theory on the macroscopical scale in this paper. The relationship among sealing width, contact pressure, and preload is solved. Based on the structural characteristics of the subsea collet connector, the self-locking characteristics are analyzed to determine the gain coefficient of the sealing structure for the loading thrust. On the microscopic scale, the contact characteristics of the turning lens-type sealing gasket and the hub structure are analyzed by the equivalent replacement of the peak cut coefficient of the one-dimensional sinusoidal wave. The influence of different leakage forms on sealing performance is discussed from both radial and circumferential leakage, and the leakage rate of the lens-type sealing structure is calculated. The hydrostatic pressure experiment of the subsea collet connector with lens-type sealing gasket is carried out, and the correctness of the theoretical analysis is verified from the results of the pressure maintaining, sealing width measurement, and preload conversion.

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A Surface Connectivity-Based Approach for Leakage Channel Prediction in Static Sealing Interface

Cited by 20 publications

References 31 publications

Synergetic effect of surface connectivity and functional parameters on the friction characteristics of a sliding contact interface

Synergetic effect of surface connectivity and functional parameters on the friction characteristics of a sliding contact interface

A Fractal Contact Model for Rough Surfaces considering the Variation of Critical Asperity Levels

Analysis of Sealing and Leakage Performance of the Subsea Collet Connector with Lens-Type Sealing Structure

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