A comprehensive study of the elasto-plastic contact of a sphere and a flat

Ghaednia, Hamid; Pope, Sara; Jackson, Robert L.; Marghitu, Dan B.

doi:10.1016/j.triboint.2015.09.005

Cited by 99 publications

(82 citation statements)

References 44 publications

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“…To observe the deformation behaviour described by different elasto-plastic models, the force displacement relationships for six contact models, denoted as CEB [28], ZMC [29], Thornton[36], Vu-Quoc [38], MJG [46] and Hertz respectively, are depicted in Figure 6 for illustrative purpose. The material and geometric parameters used to generate the curves are taken from [38], and listed in Table 1.…”

Section: The Extended Elasto-plastic Gw Modelmentioning

confidence: 99%

Extended Greenwood–Williamson Models for Rough Spheres

Zhao

Feng

2018

Journal of Applied Mechanics

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The current work aims to develop two extended Greenwood–Williamson (GW) models for spherical particles with surface roughness which can be incorporated into the discrete element modeling (DEM) framework. The defects of the classic GW model when directly adopted in DEM are fully addressed and illustrated by both theoretical and numerical results. The first model, the extended elastic GW (E-GW) model, which evaluates the elastic deformation of the asperities and the bulk substrate separately is developed to consider the positive overlap involved in the contact problem. The capability of incorporating the extended elastic model into the DEM is illustrated by the comparison between the classic and extended models. The second model, the extended elasto–plastic GW (EP-GW) model, is further developed to consider the plastic deformation of the asperities which reduces the pressure increased by the surface roughness. Numerical comparisons between the E-GW and EP-GW models are also conducted to demonstrate the effect of the plastic deformation on the pressure and deformation distributions in the contact region.

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Section: The Extended Elasto-plastic Gw Modelmentioning

confidence: 99%

Extended Greenwood–Williamson Models for Rough Spheres

Zhao

Feng

2018

Journal of Applied Mechanics

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“…There can be found a few models describing the case of the impact of an elastic plastic sphere and an elastic plastic wall for instance [14]. However, these models are more complex and require numerous parameters.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Impacts of Elastic-plastic Spheres

Szabó¹,

Kossa²

2020

Period. Polytech. Mech. Eng.

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This work presents explicit dynamic finite element simulations of various impacts of elastic-plastic solid spheres with flat walls.Different analytical models describing the mechanics of the impact phenomenon are also presented. Elastic and elastic-plastic material models for the sphere and the wall are considered during the analyses. The applicability of these different models is demonstrated and their accuracies are investigated. Closed-form analytical functions are proposed to describe the relationship between the initial velocity of the sphere and the investigated contact characteristics for the given material models. Analysis is carried out to study the effect of the friction coefficient as well as the angle of impact for various cases.

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“…In most cases, the contact of metal rough surfaces is elastoplastic [4]. However at present, there is no analytical solution to the contact problem for an elastoplastic force indentation [5,6]. As indicated in recent reviews [7,8], many analytical, experimental, and numerical studies have been performed in the past to model and predict the properties of an elastoplastic contact.…”

Section: Introductionmentioning

confidence: 99%

“…However because of their complexity, a closed solution has not been proposed. The authors of [5,6] attribute this to the difficulties of taking into account the hardenability of the material during loading. Other authors find the reason for the difficulties in describing the effects of "pileup / sink-in" [9, 10, 11, 12, etc.].…”

Section: Introductionmentioning

confidence: 99%

Influence of the form of axisymmetric load on the stress-strain state of an elastoplastic half-space

et al. 2019

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The problems of elastic sinking of materials and elastic restoration of an imprint under loading of an elastic-plastic half-space with an axisymmetric load of the form,P(r)=P0(1-r2/a2)β where 0<β<0.5 are considered. Expressions are obtained that describing the stress-strain state of an elastoplastic half-space. The conditions of the onset of plastic deformation in the near-surface layer and on the half-space of surface are considered depending on the parameter β.

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A comprehensive study of the elasto-plastic contact of a sphere and a flat

Cited by 99 publications

References 44 publications

Extended Greenwood–Williamson Models for Rough Spheres

Extended Greenwood–Williamson Models for Rough Spheres

Characterization of Impacts of Elastic-plastic Spheres

Influence of the form of axisymmetric load on the stress-strain state of an elastoplastic half-space

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