Contact area and maximum equivalent stress in elastic spherical contact with thin hard coating

Goltsberg, Roman; Etsion, I.

doi:10.1016/j.triboint.2015.09.034

Cited by 36 publications

(25 citation statements)

References 21 publications

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“…Hence, the effects of the coating mechanical properties on contact behavior are rarely studied. An exception is that the finite element method is applied in coated contact problems [7,8]. Recently, Wang et al developed a model for elastohydrodynamic lubrication of multilayered materials under point contact cases, in which the frequency response functions, relating pressure to surface displacements and stress components, are derived from the Papkovich-Neuber potentials [9].…”

Section: Introductionmentioning

confidence: 99%

Tribological behavior of coated spur gear pairs with tooth surface roughness

Liu

Zhu

et al. 2018

Friction

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Abstract:Coating is an effective way to reduce friction and wear and to improve the contact-fatigue lives of gear components, which further guarantees a longer service life and better reliability of industrial machinery. The fact that the influence coefficient linking the tractions and stress components could not be expressed explicitly increases the difficulty of coated solids contact analysis. The complicated tribological behavior between tooth surfaces influenced by lubrication and surface roughness further adds difficulty to the coated gear pair contact problems. A numerical elastohydrodynamic lubricated (EHL) contact model of a coated gear pair is proposed by considering the coupled effects of gear kinematics, coating properties, lubrication, and surface roughness. The frequency response function and the discrete convolute, fast Fourier transformation (DC-FFT) method are combined to calculate the surface deformation and the subsurface stress fields at each meshing position along the line of action (LOA). The Ree-Eyring fluid is assumed to incorporate the non-Newtonian effect, which is represented in the generalized Reynolds equation. Influences of the ratio between the Young's modulus of the coating and the substrate on the contact performance, such as pressure, film thickness, tooth friction coefficient, and subsurface stress field, are studied. The effect of the root mean square (RMS) value of the tooth surface roughness is studied by introducing the roughness data, deterministically measured by an optical profiler.

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Section: Introductionmentioning

confidence: 99%

Tribological behavior of coated spur gear pairs with tooth surface roughness

Liu

Zhu

et al. 2018

Friction

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“…This is similar to the results shown in Refs. [29,30] for the slip contact condition in the elastic regime [29]. For large interferences (>  c1 ), varying the Poisson's ratio in the range 0.25 < < 0.45 had negligible effect (less than 8%) on the results of the contact load and contact area.…”

Section: Plasticity Evolutionmentioning

confidence: 97%

“…[28]. Further studies by Goltsberg and Etsion [29,30] provided universal relations for various contact parameters in the elastic regime of a coated spherical contact. Sun et al [31] used FEM to analyze the plastic deformation of a coated spherical contact for the indentation approach.…”

Section: Introductionmentioning

confidence: 95%

A comparison of stick and slip contact conditions for a coated sphere compressed by a rigid flat

Ronen¹,

Goltsberg²,

Etsion³

2017

Friction

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Abstract:A finite element analysis is used to study the elastic-plastic contact of a coated sphere compressed by a rigid flat under the stick contact condition. This was done for a wide range of hard coating material properties and coating thicknesses. A comparison with the slip contact condition is presented in terms of the critical contact parameters (at yield inception) and plasticity evolution. Empirical expressions are provided for critical interferences of the first and second yield inceptions, in the coating and on the substrate side of the interface, respectively.

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“…For the collision behaviors between the coal gangue particles and the impact-contact problems between the coal gangue particles and the hydraulic support metal plate, through the theories, simulations and experiments [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], and other methods, many scholars have carried out similar studies on the contact behavior between particles [20] and the contact behavior between particles and plates [21][22][23][24][25] in the early stage, which provides the basis for the research of the collision behavior between coal gangue particles or between the coal gangue and the hydraulic support in the top-coal caving. Jackson et al [26] investigated the restitution coefficient of the impacting elastic-perfectly plastic spheres.…”

Section: Introductionmentioning

confidence: 99%

Study on the Vibroimpact Response of the Particle Elastic Impact on the Metal Plate

Yang

Wan

2019

Shock and Vibration

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In order to study the contact and vibration response in the reciprocating impact between coal gangue particles and metal plate, on the basis of the Hertz contact theory, L-N contact model, and the Lagrange equation, this paper established an impact-contact model when the particles free falling to vertically impacts on the metal plate. The variable damping simulation method is proposed, and the accuracy of the variable damping simulation in the medium reciprocating collision is verified by combining the constant damping simulation, the variable damping simulation, and the falling body impact-contact model. The functional relationship between the damping term and the initial impact velocity in Adams simulation is also obtained. Then, through the rigid-flexible coupling method which is combined by Adams and Hypermesh, the three types of variable damping simulations are conducted: the simulation that the free-falling rigid rock sphere impact on the rigid metal plate, the simulation that the elastic rock sphere impact on the rigid metal plate, and the simulation that the elastic rock sphere impact on the elastic metal plate, respectively. Furthermore, contact and vibrate responses of the rock sphere and the metal plate in the three types of the simulation are studied. The results show that the impact-contact response of the rock sphere obtained from the simulation that the elastic rock sphere impact on the elastic metal plate is more accurate. After the flexible treatment of the rock sphere and the metal plate, most of the system energy is consumed during the impact. The conclusions will provide a theoretical calculation method for the medium vertical reciprocating impact and a theoretical basis for the setting of the damping term in Adams simulation and support the research basis for the study of the impact behavior between coal gangue particles and the metal plate.

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Contact area and maximum equivalent stress in elastic spherical contact with thin hard coating

Cited by 36 publications

References 21 publications

Tribological behavior of coated spur gear pairs with tooth surface roughness

Tribological behavior of coated spur gear pairs with tooth surface roughness

A comparison of stick and slip contact conditions for a coated sphere compressed by a rigid flat

Study on the Vibroimpact Response of the Particle Elastic Impact on the Metal Plate

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