Three-Dimensional Local Yield Maps of Hard Coating Under Sliding Contact

Zhang, P. Y.; Dongfeng, Diao; Wang, Z. J.

doi:10.1115/1.4005265

Cited by 17 publications

(7 citation statements)

References 37 publications

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“…It should be noted here that in some prior studies, e.g., [59,60], the coating thickness was normalized by the Hertzian contact radius in the absence of coating. However, since the Hertzian contact radius depends on the normal load, this normalization does not seem to be very convenient to evaluate the dimensional coating thickness of an actual coated system.…”

Section: Experimental Validation and Correlationmentioning

confidence: 99%

Recent Development in Modeling of Coated Spherical Contact

Zhou

Etsion

2020

Materials

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Since a coated rough surface can be modeled as a collection of many spherical coated asperities, in order to understand the coated rough surface contact, it is required to first model a single coated spherical contact. This review paper presents a comprehensive summary of the coated spherical contact modeling and its experimental validation that was done mostly by the authors’ group at the Technion and published in the relevant literature. The coated spherical contact is considered under two loading modes, namely pure normal loading and combined normal and tangential loading. Based on the normally loaded spherical contact results, a coated rough surface contact modeling is presented. In addition, experimental results that show an interesting correlation with the coated spherical modeling are briefly discussed. Finally, some limited work on the bilayer/multilayer coated spherical contact is introduced.

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Section: Experimental Validation and Correlationmentioning

confidence: 99%

Recent Development in Modeling of Coated Spherical Contact

Zhou

Etsion

2020

Materials

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“…A detailed description of the numerical method was reported in Refs. [25,38]. Then the von Mises stress r vm in the contact zone was calculated with the normal stresses and shear stresses, where r vm was defined as follows [11], and a difference of less than 1% was obtained (see Ref.…”

Section: Contact Stresses Analysismentioning

confidence: 99%

“…Then the von Mises stress r vm in the contact zone was calculated with the normal stresses and shear stresses, where r vm was defined as follows [11], and a difference of less than 1% was obtained (see Ref. [25]). Figure 4 shows the distribution of normal stress r xx normalized by the maximum Hertzian contact pressure P max on the diagram of x/a 0 and z/a 0 in the y ¼ 0 plane.…”

Section: Contact Stresses Analysismentioning

confidence: 99%

“…On the other hand, Diao et al [23,24] introduced the local yield map and interface yield map of a hard coating under sliding contact, showing the yielding position by evaluating the critical maximum contact pressures for yielding at the different positions using the FEM method. Recently, Zhang et al [25] studied the three-dimensional local yield initiation of the coated substrate system in the contact region of a ball on disk model by SAM. The studies mentioned above provided valuable knowledge about the contact stresses of an ideal flat coating sliding against a surface with a certain radius.…”

Section: Introductionmentioning

confidence: 99%

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Evolution of Maximum Contact Stresses in Amorphous Carbon Coated Silicon During Sliding Wear Against Si3N4 Ball

Zhang

Diao

2013

Journal of Tribology

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The evolution of the maximum contact stresses in amorphous carbon coated silicon during sliding wear against a Si3N4 ball was investigated. Amorphous carbon coating was prepared on a silicon substrate by the electron cyclotron resonance (ECR) plasma sputtering method. Surface morphologies of the coating and counterpart were measured by an atomic force microscope (AFM). The friction and wear behavior of the coating was studied by a ball-on-disk tribometer. The cross-sections of the wear tracks at different wear stages were observed with a scanning electron microscope (SEM). Maximum contact stresses with different coating thicknesses were calculated by the three-dimensional semi-analytical method (SAM). The results demonstrated that when taking surface asperities into consideration, maximum shear stress at the bonding interface and adjacent substrate showed a dramatic increase during wear and should be responsible for the initiation and propagation of the cracks observed at the final stage of sliding.

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“…The mechanism of layer decohesion and subsurface crack initiation was explained according to the results. Zhang et al 22 plotted yield maps around the plastic yield onset on the 3D elastic hard coating flat under fully sliding condition. Semi-analytical method (SAM), conjugate gradient method (CGM), and discrete convolutional fast Fourier transform (DC-FFT) technique were used to calculate the von Mises stress distribution under different coating thickness, friction coefficient, and elastic modulus of coating and substrate.…”

Section: Introductionmentioning

confidence: 99%

A finite element model of the elastic planar and spherical contact with hard and soft coatings

Sun

Wen

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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A finite element model of a rigid sphere contact with a deformable coating flat was used to study the elastic contact between the soft and hard coatings. Meanwhile, the contact of a rigid flat and a deformable coating sphere under the same condition was used for comparison. The contact area, load, interference, and maximum equivalent von Mises stresses in the coating system were normalized by the corresponding elastic contact parameters. The empirical expressions for the above two models which contained a wide range of the mechanical and geometric properties in soft and hard coatings were established by fitting the numerical results. The changes in the location of the maximum von Mises stress distribution in the models’ soft and hard coatings were compared when the displacement loads were used. The relationships between the dimensionless maximum von Mises stress on the substrate and coating and the dimensionless contact parameters were provided when the elastic limit (plastic yield onset) occurred. The range of the dimensionless coating thickness which led to the onset of plastic yield in the coating was determined when the rigid sphere was contacting with the deformable coating flat.

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Three-Dimensional Local Yield Maps of Hard Coating Under Sliding Contact

Cited by 17 publications

References 37 publications

Recent Development in Modeling of Coated Spherical Contact

Recent Development in Modeling of Coated Spherical Contact

Evolution of Maximum Contact Stresses in Amorphous Carbon Coated Silicon During Sliding Wear Against Si3N4 Ball

A finite element model of the elastic planar and spherical contact with hard and soft coatings

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