Calculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect

Previous research on friction calculation models has mainly focused on static friction, whereas sliding friction calculation models are rarely reported. In this paper, a novel sliding friction model for realizing a dry spherical flat contact with a roughness effect at the micro/nano scale is propose...

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Autores principales:	Shengguang Zhu, Liyong Ni
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	sliding friction potential barrier theory rough surfaces in contact micro/nano scale Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/e4b17cb4b273446186fa03d055697e60
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spelling	oai:doaj.org-article:e4b17cb4b273446186fa03d055697e602021-11-25T18:23:55ZCalculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect10.3390/mi121114282072-666Xhttps://doaj.org/article/e4b17cb4b273446186fa03d055697e602021-11-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1428https://doaj.org/toc/2072-666XPrevious research on friction calculation models has mainly focused on static friction, whereas sliding friction calculation models are rarely reported. In this paper, a novel sliding friction model for realizing a dry spherical flat contact with a roughness effect at the micro/nano scale is proposed. This model yields the sliding friction by the change in the periodic substrate potential, adopts the basic assumptions of the Greenwood–Williamson random contact model about asperities, and assumes that the contact area between a rigid sphere and a nominal rough flat satisfies the condition of interfacial friction. It subsequently employs a statistical method to determine the total sliding friction force, and finally, the feasibility of this model presented is verified by atomic force microscopy friction experiments. The comparison results show that the deviations of the sliding friction force and coefficient between the theoretical calculated values and the experimental values are in a relatively acceptable range for the samples with a small plasticity index (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi mathvariant="sans-serif">Ψ</mi><mo>≤</mo><mn>1</mn></mrow></semantics></math></inline-formula>).Shengguang ZhuLiyong NiMDPI AGarticlesliding frictionpotential barrier theoryrough surfaces in contactmicro/nano scaleMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1428, p 1428 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sliding friction potential barrier theory rough surfaces in contact micro/nano scale Mechanical engineering and machinery TJ1-1570
spellingShingle	sliding friction potential barrier theory rough surfaces in contact micro/nano scale Mechanical engineering and machinery TJ1-1570 Shengguang Zhu Liyong Ni Calculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect
description	Previous research on friction calculation models has mainly focused on static friction, whereas sliding friction calculation models are rarely reported. In this paper, a novel sliding friction model for realizing a dry spherical flat contact with a roughness effect at the micro/nano scale is proposed. This model yields the sliding friction by the change in the periodic substrate potential, adopts the basic assumptions of the Greenwood–Williamson random contact model about asperities, and assumes that the contact area between a rigid sphere and a nominal rough flat satisfies the condition of interfacial friction. It subsequently employs a statistical method to determine the total sliding friction force, and finally, the feasibility of this model presented is verified by atomic force microscopy friction experiments. The comparison results show that the deviations of the sliding friction force and coefficient between the theoretical calculated values and the experimental values are in a relatively acceptable range for the samples with a small plasticity index (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi mathvariant="sans-serif">Ψ</mi><mo>≤</mo><mn>1</mn></mrow></semantics></math></inline-formula>).
format	article
author	Shengguang Zhu Liyong Ni
author_facet	Shengguang Zhu Liyong Ni
author_sort	Shengguang Zhu
title	Calculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect
title_short	Calculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect
title_full	Calculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect
title_fullStr	Calculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect
title_full_unstemmed	Calculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect
title_sort	calculation and afm experimental research on slip friction for unlubricated spherical contact with roughness effect
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e4b17cb4b273446186fa03d055697e60
work_keys_str_mv	AT shengguangzhu calculationandafmexperimentalresearchonslipfrictionforunlubricatedsphericalcontactwithroughnesseffect AT liyongni calculationandafmexperimentalresearchonslipfrictionforunlubricatedsphericalcontactwithroughnesseffect
_version_	1718411230828298240

Calculation and AFM Experimental Research on Slip Friction for Unlubricated Spherical Contact with Roughness Effect

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