A new numerical model for investigating the effect of surface roughness on the stick and slip of contacting surfaces with identical materials

Wang, Dongze; Boer, Gregory de; Neville, Anne; Ghanbarzadeh, Ali

doi:10.1016/j.triboint.2021.106947

Cited by 11 publications

(8 citation statements)

References 52 publications

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“…The appearance of a rather large defect (3.3 cm-by-1 cm) can be revealed through 296 the mapping of these nonlinearities in the acoustic spectrum, as these harmonics are 297 originating from the defect, cfr. Figure 5,6,9 and 10 [17,21,22]. In addition, the zone of 298 the surface breaking crack that activates these higher harmonics is similar to literature 299 reportings.…”

supporting

confidence: 68%

Qualitative analysis of a 3D multiphysics model for nonlinear ultrasonics and vibration induced heating at closed defects

Truyaert

Aleshin

Abeele

2022

Research in Nondestructive Evaluation

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Upon exciting a material using elastic waves, the locally induced deformation at the 1 interfaces of internally closed defects may cause nonlinear wave mechanics and dynamics in 2 the form of clapping and friction. As a result, both phenomena instigate spectral broadening of 3 the excitation spectrum as well as the production of heat, directly originating from the defect. 4To better understand and account for the physics behind the dissipation of energy by internally 5 closed defects as a result of the wave-interface interaction, dedicated models can be developed. In 6 this work, we propose a 3D finite element multiphysics model that is capable of simultaneously 7 describing the generation of nonlinearities and heating at a defect's interface experiencing clapping 8 and friction induced by elastic wave propagation. The model consists of three different modules. 9 The first module describes the elastic wave propagation in a virgin/bulk material, whereas the 10 second module captures the contact physics at the defect level. The third module is implemented 11 to calculate the diffusion of thermal energy in the specimen. The contact physics module accounts 12 for anharmonic and hysteretic effects, describing the nonlinear behavior of the defect's interfaces, 13 which is echoed in both the ultrasound spectrum and in the vibration induced heating. A qualita-14 tive analysis of the computational model, integrating the three modules, is performed to validate 15 the approach. Examples show that nonlinear spectral components are indeed observed as a result 16 of the friction and the clapping experienced by the faces of the defect. At the same time, a localized 17 temperature increase due to the induced friction is noted, and its response at the outer surface of 18 the sample is examined. The qualitative validation approves that the model is ready to be tested 19 further quantitively, and to compare its predictions to experiments.

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supporting

confidence: 68%

Qualitative analysis of a 3D multiphysics model for nonlinear ultrasonics and vibration induced heating at closed defects

Truyaert

Aleshin

Abeele

2022

Research in Nondestructive Evaluation

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“…The ZnO molecular layers are built along the (0 0 1) crystal plane. Lennard-Jones (LJ) potential 12 − 6 was employed to describe the non-bonded interaction between nhexadecane molecules, moreover, the mixed potentials including Coulomb potential and LJ 12 − 10 potential were used to pay electrostatic and van der Waals interaction between the n-hexadecane molecules and the ZnO molecules, respectively [36][37][38]. The force eld of the embedded atom method (EAM) was used to describe the interaction between metal atoms, moreover, the parameters of the force eld were obtained from the LAMMPS program.…”

Section: Models and Parametersmentioning

confidence: 99%

Lubrication Behavior of n-hexadecane on ZnO Layer at the Nanoscale: A Molecular Dynamic Exploration

Ren

Liu

et al. 2022

Tribol Lett

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In this work, the lubricating models of Cu-Zn alloy with and without the Zinc oxide (ZnO) layer were established. Molecular dynamics (MD) simulation is employed to investigate the lubrication behavior of n-hexadecane on the ZnO layer at the nanoscale. The diffusion of lubricant molecules, and the interaction and stick-slip effect between the friction pairs and the lubricants are systematically explored. The results show that the ZnO layer limits the diffusion of n-hexadecane molecules and the formed lubricating lms in the model of the substrate with the ZnO layer are obvious and stable. During the sliding process, ZnO molecules have strong interaction with lubricants molecules and adsorb lubricants molecules on the surface to form adsorption lm. The stick-slip effect in the lubricating lms generates periodic shear stress and reduces the wear of the friction pair. The ZnO layer causes lubricants molecules to be arranged regularly on the surface into a stable structure to sustain the greater load. HighlightsZnO layer limits the diffusion of n-hexadecane molecules.ZnO molecules have stronger interaction with lubricants molecules. n-hexadecane gathers and forms adsorption lm near the ZnO surface. stick-slip effect in the lubricating lms reduces the wear. lubricants molecules arrange regularly on the ZnO surface to sustain high load.

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“…The contact surface is formed by squeezing two rough surfaces and is widely present on all mechanical interfaces, plays an important role in contact characteristics on the mechanical interfaces (e.g. stiffness [4], damping [5], slip [6,7], wear [8,9], stickiness [10], lubrication [11]) and the overall characteristics of mechanical systems (e.g. inherent frequencies [12], modal vibrations [13]).…”

Section: Graphical Abstractmentioning

confidence: 99%

“…Only the contact area between asperities whose contact radius is larger than the sampling resolution can be calculated with a certain degree of credibility. 6 The equivalent calculation method of contact area between two 3D surfaces based on 2D profiles…”

Section: D Numerical Simulationmentioning

confidence: 99%

An equivalent calculation method for 3D contact area between two rough surfaces based on 2D profiles

Jing

Meng

Dai

et al. 2022

Preprint

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The calculation of the real contact area between rough surfaces is an important prerequisite for studying the contact characteristics of mechanical joints. However, it is challenging to accurately calculate the real contact area between rough surfaces by existing theoretical and experimental methods. Therefore, an efficient and practical equivalent calculation method for the real contact area between three-dimensional(3D) rough surfaces based on two-dimensional(2D) profiles is presented in this paper. The main advantage of the presented method as compared with those available in the literature is that the real contact area can be predicted only by the section of the 3D rough surfaces in contact, which greatly reduces the computational cost. The sampling strategy of sections is studied to improve the accuracy of the proposed method. The accuracy of the proposed equivalent calculation method is verified by numerical simulation. The results show that the proposed equivalent calculation method can efficiently predict the real contact area between rough surfaces within the scope of engineering application.

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A new numerical model for investigating the effect of surface roughness on the stick and slip of contacting surfaces with identical materials

Cited by 11 publications

References 52 publications

Qualitative analysis of a 3D multiphysics model for nonlinear ultrasonics and vibration induced heating at closed defects

Qualitative analysis of a 3D multiphysics model for nonlinear ultrasonics and vibration induced heating at closed defects

Lubrication Behavior of n-hexadecane on ZnO Layer at the Nanoscale: A Molecular Dynamic Exploration

An equivalent calculation method for 3D contact area between two rough surfaces based on 2D profiles

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