A universal model for a frictionless elastic-plastic coated spherical normal contact with moderate to large coating thicknesses

Chen, Z.; Goltsberg, Roman; Etsion, I.

doi:10.1016/j.triboint.2017.05.020

Cited by 30 publications

(29 citation statements)

References 33 publications

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“…provided that 0:2 s 0:5: Equations (16) and 18, along with C 3 substituted for C 2 , should be used to calculate the denominators on the left side of Eqs. (19a) and (19b).…”

Section: Sphericalmentioning

confidence: 99%

“…The contact radius has been divided into phases and subphases based on S Ã y and d n ¼ d s =d c ; respectively, where d c is found from Eq. (16).…”

Section: Appendix Amentioning

confidence: 99%

“…Bhushan and Peng [10] also reviewed the narrow area of numerical methods (including the boundary element method and the finite element method) applied to the contact mechanics of multilayered rough surfaces and should be referred to when considering that topic, although a considerable amount of work has been occurred since its publication in 2002 [11][12][13][14][15][16]. The current review will not focus on the effects of coatings or layered contacts.…”

Section: Introductionmentioning

confidence: 99%

“…The current review will not focus on the effects of coatings or layered contacts. Recent work in the area includes research into the inception of yielding in spherical shells [17], layered elastic-plastic spherical contacts [13][14][15][16], and the indentation of thin coatings for characterization of their material properties [18,19]. Recently, Chen et al [16] completed a work on a universal model of elastic-plastic contact of thin layered or coated spherical surfaces.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Review of Elastic–Plastic Contact Mechanics

Ghaednia

Wang

Saha

et al. 2017

Applied Mechanics Reviews

205

120

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In typical metallic contacts, stresses are very high and result in yielding of the material. Therefore, the study of contacts which include simultaneous elastic and plastic deformation is of critical importance. This work reviews the current state-of-the-art in the modeling of single asperity elastic–plastic contact and, in some instances, makes comparisons to original findings of the authors. Several different geometries are considered, including cylindrical, spherical, sinusoidal or wavy, and axisymmetric sinusoidal. As evidenced by the reviewed literature, it is clear that the average pressure during heavily loaded elastic–plastic contact is not governed by the conventional hardness to yield strength ratio of approximately three, but rather varies according to the boundary conditions and deformed geometry. For spherical contact, the differences between flattening and indentation contacts are also reviewed. In addition, this paper summarizes work on tangentially loaded contacts up to the initiation of sliding. As discussed briefly, the single asperity contact models can be incorporated into existing rough surface contact model frameworks. Depending on the size of a contact, the material properties can also effectively change, and this topic is introduced as well. In the concluding discussion, an argument is made for the value of studying hardening and other failure mechanisms, such as fracture as well as the influence of adhesion on elastic–plastic contact.

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“…provided that 0:2 s 0:5: Equations (16) and 18, along with C 3 substituted for C 2 , should be used to calculate the denominators on the left side of Eqs. (19a) and (19b).…”

Section: Sphericalmentioning

confidence: 99%

“…The contact radius has been divided into phases and subphases based on S Ã y and d n ¼ d s =d c ; respectively, where d c is found from Eq. (16).…”

Section: Appendix Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Elastic–Plastic Contact Mechanics

Ghaednia

Wang

Saha

et al. 2017

Applied Mechanics Reviews

205

120

View full text Add to dashboard Cite

show abstract

“…The real area of contact for a given loading condition or a combination of loads is generally determined either by dedicated experiments or physics based models. There are numerous models and experimental studies available for normal load flattening for uncoated [4][5][6] and coated sheets [7][8][9][10][11]. In a typical sheet metal forming process, the sheet surface is deformed due to a contact pressure (normal load), sub-surface strain in the sheet metal, and sliding of the tool over the sheet surface.…”

Section: Introductionmentioning

confidence: 99%

Evolution of real area of contact due to combined normal load and sub-surface straining in sheet metal

et al. 2020

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Understanding asperity flattening is vital for a reliable macro-scale modeling of friction and wear. In sheet metal forming processes, sheet surface asperities are deformed due to contact forces between the tools and the workpiece. In addition, as the sheet metal is strained while retaining the normal load, the asperity deformation increases significantly. Deformation of the asperities determines the real area of contact which influences the friction and wear at the tool-sheet metal contact. The real area of contact between two contacting rough surfaces depends on type of loading, material behavior, and topography of the contacting surfaces. In this study, an experimental setup is developed to investigate the effect of a combined normal load and sub-surface strain on real area of contact. Uncoated and zinc coated steel sheets (GI) with different coating thicknesses, surface topographies, and substrate materials are used in the experimental study. Finite element (FE) analyses are performed on measured surface profiles to further analyze the behavior observed in the experiments and to understand the effect of surface topography, and coating thickness on the evolution of the real area of contact. Finally, an analytical model is presented to determine the real area contact under combined normal load and sub-surface strain. The results show that accounting for combined normal load and sub-surface straining effects is necessary for accurate predictions of the real area of contact.

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The size-dependent elastohydrodynamic lubrication contact of a coated half-plane with non-Newtonian fluid

Hong-xia

et al. 2021

Appl. Math. Mech.-Engl. Ed.

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Based on the couple-stress theory, the elastohydrodynamic lubrication (EHL) contact is analyzed with a consideration of the size effect. The lubricant between the contact surface of a homogeneous coated half-plane and a rigid punch is supposed to be the non-Newtonian fluid. The density and viscosity of the lubricant are dependent on fluid pressure. Distributions of film thickness, in-plane stress, and fluid pressure are calculated by solving the nonlinear fluid-solid coupled equations with an iterative method. The effects of the punch radius, size parameter, coating thickness, slide/roll ratio, entraining velocity, resultant normal load, and stiffness ratio on lubricant film thickness, in-plane stress, and fluid pressure are investigated. The results demonstrate that fluid pressure and film thickness are obviously dependent on the size parameter, stiffness ratio, and coating thickness.

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A universal model for a frictionless elastic-plastic coated spherical normal contact with moderate to large coating thicknesses

Cited by 30 publications

References 33 publications

A Review of Elastic–Plastic Contact Mechanics

A Review of Elastic–Plastic Contact Mechanics

Evolution of real area of contact due to combined normal load and sub-surface straining in sheet metal

The size-dependent elastohydrodynamic lubrication contact of a coated half-plane with non-Newtonian fluid

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