A micromechanics investigation of sliding wear in coated components

Yan, Wenyi; so, Esteban P. Bus; O’Dowd, Noel P.

doi:10.1098/rspa.2000.0617

Cited by 35 publications

(11 citation statements)

References 18 publications

(16 reference statements)

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“…The maximum contact pressure is directly linked to the wear state of a ductile material. The wear rate increases with the maximum contact pressure under a given load [31]. Therefore, if a measured low hardness of SMA is due to a large transformation strain, then it would result in a high wear resistance, which can explain the recent observed anomalous relationship between hardness and wear properties of a superelastic NiTi SMA [4].…”

Section: Spherical Indentation Hardnessmentioning

confidence: 79%

Spherical indentation hardness of shape memory alloys

Yan

Sun

Liu

2006

Materials Science and Engineering: A

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Using dimensional analysis and the finite element method, the spherical indentation hardness of SMAs is investigated. The scaling relationship between the hardness and the mechanical properties of a SMA, such as the forward transformation stress, the maximum transformation strain magnitude, has been derived. Numerical results demonstrated that the hardness increases with the indentation depth but there is no threefold relationship between the hardness and the forward transformation stress. Increasing the maximum transformation strain magnitude would reduce the hardness of the material. These research results enhance our understanding of the hardness from the spherical indentation of SMAs.

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Section: Spherical Indentation Hardnessmentioning

confidence: 79%

Spherical indentation hardness of shape memory alloys

Yan

Sun

Liu

2006

Materials Science and Engineering: A

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“…The ratchetting theory for wear has been used in wear simulation schemes by [14][15][16]. [17][18][19] made qualitative prediction of the wear of coated samples in a pin-on-disc tribometer which showed good qualitative agreement with experimental results.…”

Section: Introductionmentioning

confidence: 99%

A predictive modeling scheme for wear in tribometers

Hegadekatte¹,

Kurzenhäuser

Huber

et al. 2008

Tribology International

104

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Study of sliding and rolling/sliding wear in complex micro-mechanical components is often accomplished experimentally using a pin-on-disc and twin-disc rolling/sliding tribometer respectively (conducted within the parameter space of the tribo-components). The present paper proposes an approach that involves a computationally efficient incremental implementation of Archard's wear model on the global scale (Global Incremental Wear Model-GIWM) for modeling sliding and slipping wear in such experiments. It will be shown that this fast simplistic numerical tool can be used to identify the wear coefficient from pin-on-disc experimental data and also predict the wear depths within a limited range of parameter variation. Further it will also be used to study the effect of introducing friction coefficient into the wear model and and also to model water lubricated experiments. A similar tool is presented to model wear due to a defined slip in a twin-disc rolling/sliding tribometer. The resulting wear depths from this tool is verified using two different finite element based numerical tools namely, the Wear-Processor, which is a FE post processor, and a userdefined subroutine UMESHMOTION in the commercial FE package ABAQUS. It will be shown that the latter two tools have the potential for use in predicting wear and the effective life span of any general tribosystem using the identified wear coefficient from relevant tribometry data.

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“…Sliding friction and wear take place when surfaces of the components contact each other. Furthermore, Sliding wear between two bodies generally involves three steps, i.e., developing localized deformation, propagating micro-crack and forming wear debris [22].…”

Section: Introductionmentioning

confidence: 99%

Friction and wear study of the hemispherical rotor bushing in a variable capacitance micromotor

Zhang

Meng

2005

Microsyst Technol

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Friction and wear are the most serious problems for micromotors in microelectromechanical systems (MEMS). In the paper, a linear-sliding wear model of the contact between the rotor bushing and the ground plane is presented to describe the wear and a corresponding simplified method is proposed to simulate the wearing process. The effects of geometry parameters, material properties and applied operating conditions on the evolution of dimensional and volumetric wear rates and frictional torques are explored for normally loaded rotating rotor bushing sliding on the ground plane. A hemispherical-bushing-on-ground-plane configuration finite element model (FEM) is set up and the implementation of the contact task based on ANSYS and the contact element approach is introduced to provide the numerical simulations acted as a guide to solution of the contact problems in micromotors. Numerical simulations and results of the wear rates, frictional torques, contact stresses and contact pressure are studied and the effects of roughness, material properties, geometry parameters and FEM mesh of the bushing and the ground plane are discussed. It is indicated that the nonlinear effects cannot be ignored and the results should not be used to predict the absolute wear lifetime whereas surface engineering, lower wear materials and rational designs for micromotors in MEMS should be applied to bring the friction and wear behaviors into the acceptable regimes.

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A micromechanics investigation of sliding wear in coated components

Cited by 35 publications

References 18 publications

Spherical indentation hardness of shape memory alloys

Spherical indentation hardness of shape memory alloys

A predictive modeling scheme for wear in tribometers

Friction and wear study of the hemispherical rotor bushing in a variable capacitance micromotor

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