Normal contact analysis for spherical pump based on fractal theory

Dong Guan; Li Jing; Junjie Gong; Hui Shen; Harry H. Hilton

doi:10.1016/j.triboint.2018.04.002

Normal contact analysis for spherical pump based on fractal theory

Dong Guan, Li Jing, Junjie Gong, Hui Shen, Harry H. Hilton

Research output: Contribution to journal › Article › peer-review

Abstract

Spherical pump has a ball-in-socket contact pattern between piston and cylinder. Therefore, traditional Hertz contact theory is not applicable and fractal theory is employed to investigate the conformal contact between piston and cylinder in this paper. The asperities contact on roughness surface is regarded as Hertz contact and friction effects are considered. Besides, the contact coefficient is proposed, which is affected by the structural parameters of piston radius and radial clearance as well as the material properties. Effects of fractal parameters, structural parameters, material property and friction coefficient on normalized normal contact stiffness are investigated and analyzed. Results indicate the normal contact stiffness can be improved by enlarging piston radius, material hardness and decreasing radial clearance, friction coefficient.

Original language	English (US)
Pages (from-to)	117-123
Number of pages	7
Journal	Tribology International
Volume	124
DOIs	https://doi.org/10.1016/j.triboint.2018.04.002
State	Published - Aug 2018

Keywords

Fractal theory
Friction
Normal contact stiffness
Spherical pump

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Surfaces and Interfaces
Surfaces, Coatings and Films

Online availability

10.1016/j.triboint.2018.04.002

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title = "Normal contact analysis for spherical pump based on fractal theory",

abstract = "Spherical pump has a ball-in-socket contact pattern between piston and cylinder. Therefore, traditional Hertz contact theory is not applicable and fractal theory is employed to investigate the conformal contact between piston and cylinder in this paper. The asperities contact on roughness surface is regarded as Hertz contact and friction effects are considered. Besides, the contact coefficient is proposed, which is affected by the structural parameters of piston radius and radial clearance as well as the material properties. Effects of fractal parameters, structural parameters, material property and friction coefficient on normalized normal contact stiffness are investigated and analyzed. Results indicate the normal contact stiffness can be improved by enlarging piston radius, material hardness and decreasing radial clearance, friction coefficient.",

keywords = "Fractal theory, Friction, Normal contact stiffness, Spherical pump",

author = "Dong Guan and Li Jing and Junjie Gong and Hui Shen and Hilton, {Harry H.}",

note = "Funding Information: The authors would like to thank the support from the China Scholarship Council (Grant Number 201506280148 ) and Jiangdu research institute of Yangzhou University (Grant Number YDJD201708 ). Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = aug,

doi = "10.1016/j.triboint.2018.04.002",

language = "English (US)",

volume = "124",

pages = "117--123",

journal = "Tribology International",

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TY - JOUR

T1 - Normal contact analysis for spherical pump based on fractal theory

AU - Guan, Dong

AU - Jing, Li

AU - Gong, Junjie

AU - Shen, Hui

AU - Hilton, Harry H.

N1 - Funding Information: The authors would like to thank the support from the China Scholarship Council (Grant Number 201506280148 ) and Jiangdu research institute of Yangzhou University (Grant Number YDJD201708 ). Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/8

Y1 - 2018/8

N2 - Spherical pump has a ball-in-socket contact pattern between piston and cylinder. Therefore, traditional Hertz contact theory is not applicable and fractal theory is employed to investigate the conformal contact between piston and cylinder in this paper. The asperities contact on roughness surface is regarded as Hertz contact and friction effects are considered. Besides, the contact coefficient is proposed, which is affected by the structural parameters of piston radius and radial clearance as well as the material properties. Effects of fractal parameters, structural parameters, material property and friction coefficient on normalized normal contact stiffness are investigated and analyzed. Results indicate the normal contact stiffness can be improved by enlarging piston radius, material hardness and decreasing radial clearance, friction coefficient.

AB - Spherical pump has a ball-in-socket contact pattern between piston and cylinder. Therefore, traditional Hertz contact theory is not applicable and fractal theory is employed to investigate the conformal contact between piston and cylinder in this paper. The asperities contact on roughness surface is regarded as Hertz contact and friction effects are considered. Besides, the contact coefficient is proposed, which is affected by the structural parameters of piston radius and radial clearance as well as the material properties. Effects of fractal parameters, structural parameters, material property and friction coefficient on normalized normal contact stiffness are investigated and analyzed. Results indicate the normal contact stiffness can be improved by enlarging piston radius, material hardness and decreasing radial clearance, friction coefficient.

KW - Fractal theory

KW - Friction

KW - Normal contact stiffness

KW - Spherical pump

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JO - Tribology International

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ER -

Normal contact analysis for spherical pump based on fractal theory

Abstract

Keywords

ASJC Scopus subject areas

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