Gotowe bibliografie tematyczne / Interfacial asperities

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Gotowa bibliografia na temat „Interfacial asperities”

Autor: Grafiati

Data publikacji: 7 września 2024

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Interfacial asperities"

Yuan-hao, Xing, Li Chi, Li Shuan-hu, and Gao Yu. "Revealing asperity-controlled failure patterns in landslides: A case study of Hushuo Expressway, Inner Mongolia." PLOS One 20, no. 5 (2025): e0323903. https://doi.org/10.1371/journal.pone.0323903.

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This study systematically investigates the failure mechanism of interfacial landslides through experimental validation and engineering applications of interfacial asperity theory. An innovative scaled physical modeling approach was developed, incorporating artificially prefabricated asperities along the sliding interface. Using 3D laser scanning to monitor slope deformation, the physical experiments provide the first direct evidence linking asperity rupture to landslide initiation. The interfacial asperity theory proves particularly effective in analyzing the three recurrent landslides along t

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Han, Yujin, Pierre-Marie Thebault, Corentin Audes, et al. "Temperature and chemical effects on the interfacial energy between a Ga–In–Sn eutectic liquid alloy and nanoscopic asperities." Beilstein Journal of Nanotechnology 13 (August 23, 2022): 817–27. http://dx.doi.org/10.3762/bjnano.13.72.

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The interfacial energies between a eutectic Ga–In–Sn liquid alloy and single nanoscopic asperities of SiOx, Au, and PtSi have been determined in the temperature range between room temperature and 90 °C by atomic force spectroscopy. For all asperities used here, we find that the interfacial tension of the eutectic Ga–In–Sn liquid alloy is smaller than its free surface energy by a factor of two (for SiOx) to eight (for PtSi). Any significant oxide growth upon heating studied was not detected here, and the measured interfacial energies strongly depend on the chemistry of the asperities. We also o

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Wiertlewski, Michaël, Rebecca Fenton Friesen, and J. Edward Colgate. "Partial squeeze film levitation modulates fingertip friction." Proceedings of the National Academy of Sciences 113, no. 33 (2016): 9210–15. http://dx.doi.org/10.1073/pnas.1603908113.

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When touched, a glass plate excited with ultrasonic transverse waves feels notably more slippery than it does at rest. To study this phenomenon, we use frustrated total internal reflection to image the asperities of the skin that are in intimate contact with a glass plate. We observed that the load at the interface is shared between the elastic compression of the asperities of the skin and a squeeze film of air. Stroboscopic investigation reveals that the time evolution of the interfacial gap is partially out of phase with the plate vibration. Taken together, these results suggest that the ski

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Wu, Chu Han, Liang Chi Zhang, Shan Qing Li, Zheng Lian Jiang, and Pei Lei Qu. "Effect of Asperity Plastic Deformation on the Interface Friction in Metal Forming." Key Engineering Materials 626 (August 2014): 222–27. http://dx.doi.org/10.4028/www.scientific.net/kem.626.222.

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This paper investigates the effect of the plastic deformation of surface asperities on the interface friction in metal forming involving multi-scale deformation with random surface topography. The equivalent interfacial layer (EIL) introduced by the authors previously was used to integrate the Reynolds equation with the plastic deformation of the randomly distributed surface asperities. The contributions of solid-lubricant interaction, lubricant viscosity and microscopic deformation were therefore included efficiently in a conventional macroscopic finite element analysis. The merit of the meth

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Komvopoulos, K., and D. H. Choi. "Elastic Finite Element Analysis of Multi-Asperity Contacts." Journal of Tribology 114, no. 4 (1992): 823–31. http://dx.doi.org/10.1115/1.2920955.

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The plane-strain contact problem of an elastic half-space indented by a nominally flat rigid surface having a finite number of regularly spaced cylindrical asperities is investigated using the finite element method to gain an understanding of the interactions in multi-asperity contacts. The significance of the number and spacing of asperities on the contact behavior at the center and edges of the interfacial region is examined. Subsurface stress fields of multi-asperity contacts are presented for various asperity distributions and indentation depths. Asperity interaction effects are quantified

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Komvopoulos, K., N. Saka, and N. P. Suh. "The Mechanism of Friction in Boundary Lubrication." Journal of Tribology 107, no. 4 (1985): 452–62. http://dx.doi.org/10.1115/1.3261108.

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The primary friction mechanism between boundary-lubricated sliding surfaces was investigated. Experiments were performed on well-polished aluminum, copper, and chromium using mineral oil lubricant. It was found that the prevailing boundary lubrication model, which is based on the adhesion between asperities and shearing of the lubricant film, cannot account for the formation of plowing grooves on polished surfaces. Scanning electron micrographs of the worn surfaces and surface profiles have shown that plowing is the dominant mechanism of friction in boundary lubrication. Theoretical analysis h

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Komvopoulos, K., and W. Yan. "Three-Dimensional Elastic-Plastic Fractal Analysis of Surface Adhesion in Microelectromechanical Systems." Journal of Tribology 120, no. 4 (1998): 808–13. http://dx.doi.org/10.1115/1.2833783.

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High adhesion is often encountered at contact interfaces of miniaturized devices, known as microelectromechanical systems, due to the development of capillary, electrostatic, and van der Waals attractive forces. In addition, deformation of contacting asperities on opposing surfaces produces a repulsive interfacial force. Permanent surface adhesion (referred to as stiction) occurs when the total interfacial force is attractive and exceeds the micromachine restoring force. In the present study, a three-dimensional fractal topography description is incorporated into an elastic-plastic contact mec

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Komvopoulos, K., N. Saka, and N. P. Suh. "Plowing Friction in Dry and Lubricated Metal Sliding." Journal of Tribology 108, no. 3 (1986): 301–12. http://dx.doi.org/10.1115/1.3261181.

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Experimental evidence for plowing under dry and lubricated sliding conditions is presented and analytical expressions for the coefficient of friction due to plowing are obtained. The theoretical friction coefficient was found to be a function of the sharpness of the hard asperities, the interfacial “friction” conditions and the shape of the plastic zone. The agreement between theoretical and experimental friction coefficients from lubricated sliding and cutting experiments was remarkably good. The discrepancy between theory and experiment in the case of dry sliding between like metals was show

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Takahashi, Yasuo, Terumi Nakamura, Yoshihiro Asakura, and Masakatsu Maeda. "Influence of surface asperities on interfacial extension during solid state pressure welding." IOP Conference Series: Materials Science and Engineering 61 (August 1, 2014): 012001. http://dx.doi.org/10.1088/1757-899x/61/1/012001.

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Maciejewski, Jan, Sebastian Bąk, and Paweł Ciężkowski. "Modelling of Rock Joints Interface under Cyclic Loading." Studia Geotechnica et Mechanica 42, no. 1 (2020): 36–47. http://dx.doi.org/10.2478/sgem-2019-0030.

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AbstractThe problem of numerical simulation of the material interface response under monotonic and cyclic loading is of fundamental scientific and engineering importance. In fact, such interfaces occur in most engineering and geotechnical structures. The present work is devoted to the deformational response analysis of contact interfaces under monotonic and cyclic loads. The class of materials includes rock and structural joints, soil structure interfaces, masonry and cementitious joints, localized shear bands and so on.The aim of the proposed model is to simulate the cyclic shear test under c

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Rozprawy doktorskie na temat "Interfacial asperities"

Shu, Weiwei. "Analogical modelling of frictional slip on faults : implications for induced and triggered seismicity." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAH004.

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La rugosité multi-échelle de l'interface d'une faille est à l'origine de multiples aspérités qui établissent un ensemble complexe et discret de contacts réels. Puisque les aspérités contrôlent l'initiation et l'évolution du glissement de la faille, il est important d'explorer les relations intrinsèques entre le comportement collectif des aspérités locales et la stabilité frictionnelle de la faille globale. Nous proposons ici une nouvelle approche expérimentale analogique, qui nous permet de capturer l'évolution temporelle du glissement de chaque aspérité sur une interface de faille. Nous const

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Części książek na temat "Interfacial asperities"

"predicting the permissible external loading that a diamond-coated cutting tool can withstand without premature de-bonding. 3.1.6. Wear mechanisms. The failure of CVD diamond-coated inserts during machining can be in the form of flaking (interfacial failure) or abrasive wear (gradual cohesive failure) [22]. Ideally, a test of superb adhesion is when the diamond coating fully deteriorates by wear rather than flaking. Flaking will occur primarily due to poor adhesion between the diamond coating and the carbide substrate [6]. Therefore, flaking is clearly undesirable because the benefit of using a diamond coating is lost, except for the chip breaking assistance of faceted diamond crystals at the rake surface [29, 75]. If the adhesion strength of the CVD diamond coating is sufficient to withstand the machining stresses, then the abrasive action between the workpiece material and the diamond coating becomes the primary failure mechanism. Unless the CVD diamond coating is polished, a two-step wear mechanism is ex pected to occur. The first step is caused by the initial high surface roughness of the CVD diamond coating in which crack initiation occurs at the surface. The mecha nism that describes such behavior was proposed by Gunnars and Alahelisten [56]. They described a three-zone wear model as shown in Fig. 6. In this model, the role of residual stresses becomes significant in controlling crack propagation from the surface to the interface that could lead to interface failure (flaking). As outlined earlier, the high total compressive residual stress present in CVD diamond coatings on carbide inserts was assumed to be biaxial and oriented parallel to the interface. Wear starts to occur at the surface, which, because of geometry, allows stress to relax. A crack is more likely to initiate at protruding grains in zone I and propa gate preferentially along the (111) easy cleavage planes of diamond. The geometry at deeper depths, however, prevents the compressive residual stress from relaxing. Therefore, as the crack propagates deeper in the coating, it encounters higher com pressive stresses that cause the cracks to redirect their paths deviating from cleavage planes to a direction parallel to the interface in region II. The high compressive stress now causes cracks to propagate fast parallel to the interface resulting in a smooth surface in region III. Due to the smoother surface, fewer asperities will be present and it becomes harder to nucleate cracks." In Adhesion Aspects of Thin Films, Volume 1. CRC Press, 2014. http://dx.doi.org/10.1201/b11971-20.

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Streszczenia konferencji na temat "Interfacial asperities"

Jayadeep, U. B., R. Krishna Sabareesh, R. Nirmal, K. V. Rijin, and C. B. Sobhan. "Molecular Dynamics Modeling of the Effect of Thermal Interface Material on Thermal Contact Conductance." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52204.

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Thermal contact conductance is used to indicate the resistance offered by a contact interface to the flow of heat. When an interface material is applied as nano-layered coatings on super-finished contacting surfaces, the possibility of size effects necessitates the use of a discrete computation method for its analysis. Hence, a methodology is proposed which utilizes Molecular Dynamics (MD) simulations to obtain the size affected thermal conductivity of the interfacial layer, which in turn characterizes the thermal contact conductance behavior. Molecular Dynamics codes have been developed, maki

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Jiang, Jishen, Bingqian Xu, Weizhe Wang, Richard Amankwa Adjei, Xiaofeng Zhao, and Yingzheng Liu. "FE Analysis of the Effects of TGO Thickness and Interface Asperity on the Cracking Behavior Between the TGO and the Bond Coat." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56755.

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Finite element simulations based on an interface cohesive zone model (CZM) have been developed to mimic the interfacial cracking behavior between the α-Al2O3 thermally grown oxide (TGO) and the aluminum rich Pt–Al metallic bond coat (BC) during cooling from high temperature to ambient temperature. A two dimensional half-periodic sinusoidal geometry corresponding to interface undulation is modelled. The effects of TGO thickness and interface asperity on the stress distribution and the cracking behavior are examined by parametric studies. The simulation results show that cracking behavior due to

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Jeng, Yeau-Ren, and Pay-Yau Huang. "A Material Removal Rate Model Considering Interfacial Micro-Contact Wear Behavior for Chemical Mechanical Polishing." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63260.

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Chemical Mechanical Polishing (CMP) is a highly effective technique for planarizing wafer surfaces. Consequently, considerable research has been conducted into its associated material removal mechanisms. The present study proposes a CMP material removal rate model based upon a micro-contact model which considers the effects of the abrasive particles located between the polishing interfaces, thereby the down force applied on the wafer is carried both by the deformation of the polishing pad asperities and by the penetration of the abrasive particles. It is shown that the current theoretical resu

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Dini, Daniele. "Between Continuum and Atomistic Contact Mechanics: Could We Bridge the Gap?" In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44446.

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Recently various attempts have been made to compare continuum contact mechanics to atomistic simulations. The general conclusion of these studies is that continuum mechanics is not adequate to study nanoscopic interactions. Although the use of continuum mechanics at the nanometre scale has a number of limitations, some of the results obtained at atomic level using atomistic simulations can be explained at the continuum level by modelling the interacting surfaces as idealised rough contacts. This will be explicitly proven in this paper. The interfacial contact pressure distribution is found for

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Xiao, Huifang, Yunyun Sun, Xiaojun Zhou, and Zaigang Chen. "Study on the Normal Contact Stiffness of Rough Surface in Mixed Lubrication." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85034.

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In this paper, a general contact stiffness model is proposed to study the mixed lubricated contact between a rough surface and a rigid flat plate, which is the equivalent model for the contact between two rough surfaces and is the general case for engineering contact interfaces. The total interfacial contact stiffness is composed of the dry rough surface contact stiffness and the liquid lubricant contact stiffness. The GW model is used for surface topography description and the contact stiffness of a single asperity is derived from the Hertz contact theory. The whole dry rough contact stiffnes

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DelRio, Frank W., Maarten P. de Boer, Leslie M. Phinney, Chris J. Bourdon, and Martin L. Dunn. "Van der Waals and Capillary Adhesion of Microelectromechanical Systems." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15169.

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Interfacial adhesion is an important factor in determining the performance and reliability of microelectromechanical systems (MEMS). Van der Waals dispersion forces are the dominant adhesion mechanism in the low relative humidity (RH) regime. At small roughness values, adhesion is mainly due to van der Waals dispersion forces acting across extensive non-contacting areas and is related to 1/Dave2, where Dave is the average surface separation. These contributions must be considered due to the close proximity of the surfaces, which is a result of the planar deposition technology. At large roughne

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Hofmeister, Marius, Felix Fischer, Lukas Boden, and Katharina Schmitz. "Simulative Prediction of Leakage for Seat Valves and Bio-Hybrid Fuels." In International Sealing Conference. VDMA Fluidtechnik, 2024. http://dx.doi.org/10.61319/htxaf9px.

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Seat valves play a critical role in various technical applications, such as automotive injectors. Here, predicting leakage is vital, as it can lead to poor combustion behavior or complete system failure. To address this, a simulation model originally designed for predicting leakage of air and hydrogen in ball seat valves was adapted for the use with bio-hybrid fuels. The simulation model uses a modified flow equation based on the Hagen–Poiseuille equation and the effective medium approach to calculate leakage flow. The corresponding input parameters are calculated according the Persson’s conta

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