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Journal articles on the topic 'Contact parameters'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

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1

Duman, S., K. Ejderha, Ö. Yiğit, and A. Türüt. "Determination of contact parameters of Ni/n-GaP Schottky contacts." Microelectronics Reliability 52, no. 6 (2012): 1005–11. http://dx.doi.org/10.1016/j.microrel.2011.12.018.

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2

Wessels, Nicola, and Klaus Hackl. "Relating DEM contact parameters to macroscopic material parameters." PAMM 16, no. 1 (2016): 563–64. http://dx.doi.org/10.1002/pamm.201610270.

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3

Sivitski, Alina, and Priit Põdra. "Contact Stiffness Parameters for Finite Element Modeling of Contact." Key Engineering Materials 799 (April 2019): 211–16. http://dx.doi.org/10.4028/www.scientific.net/kem.799.211.

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Contact modeling could be widely used for different machine elements normal contact pressure calculations and wear simulations. However, classical contact models as for example Hertz contact models have many assumptions (contact bodies are elastic, the contact between bodies is ellipse-shaped, contact is frictionless and non-conforming). In conditions, when analytical calculations cannot be performed and experimental research is economically inexpedient, numerical methods have been applied for solving such engineering tasks. Contact stiffness parameters appear to be one of the most influential

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Kowalik, Piotr, Edyta Wrobel, and Janusz Mazurkiewicz. "Electrical parameters of solar cells with electrodes made by selective metallization." Microelectronics International 33, no. 1 (2016): 36–41. http://dx.doi.org/10.1108/mi-03-2015-0028.

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Purpose – This paper aims to present the results of measurements of the photovoltaic structures made by electroless selective metallization technology. The developed technology provides low-cost contacts in any form, and parameters of photovoltaic cells made in this technology provide reliable results, comparable with those usually used. Design/methodology/approach – In this paper, photovoltaic cells with contacts based on Nip and NiCuP alloy were performed. As a substrate, mono- and multicristaline silicon was used. After photovoltaic cells have been prepared, sheet resistance of the contact

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Petrov, A. R., E. I. Gracheva, and S. Valtchev. "Study of technical parameters of magnetic starters and switches installed in workshop networks." Vestnik MGTU 26, no. 4 (2023): 384–94. http://dx.doi.org/10.21443/1560-9278-2023-26-4-384-394.

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The study of technical parameters of low-voltage switching devices of Russian production – magnetic starters PML and switches RE19 has been carried out. The problem of evaluating energy efficiency of operation of magnetic starters and switches installed in in-plant power supply systems has been presented. The main destabilizing factors significantly affecting the technical characteristics of switching devices with voltage up to 1 kV have been given. Reliability of functioning of the investigated devices, first of all, depends on the degree of wear of switching contacts. The dependences of the

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Shi, Xi, and Andreas A. Polycarpou. "Measurement and Modeling of Normal Contact Stiffness and Contact Damping at the Meso Scale." Journal of Vibration and Acoustics 127, no. 1 (2005): 52–60. http://dx.doi.org/10.1115/1.1857920.

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Modeling of contact interfaces that inherently include roughness such as joints, clamping devices, and robotic contacts, is very important in many engineering applications. Accurate modeling of such devices requires knowledge of contact parameters such as contact stiffness and contact damping, which are not readily available. In this paper, an experimental method based on contact resonance is developed to extract the contact parameters of realistic rough surfaces under lightly loaded conditions. Both Hertzian spherical contacts and flat rough surfaces in contact under normal loads of up to 100

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Ait Ahmed, S., Yaovi Gagou, B. Jonckheere, and R. Bouzerar. "Electrical capturing system for train supplying and involving parameters." OAJ Materials and Devices 6, no. 1 (2022): 1127–1. http://dx.doi.org/10.23647/ca.md20221127.

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Electric trains are powered by a current distribution device which depends on several parameters. The research works presented in this paper are located upstream of two types of important applications in the railway field: the electrical supply of trains involving the sliding or stationary pantograph/catenary contact and the famous problem of shunting of trains involving the wheel/rail rolling contact. These cannot be assumed without energy loss. In the case of train navigation, electric current can be transmitted by spots established between sources and the carbon strip. The quality of the pa

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8

Hamadouche, Fella, Habib Benzaama, Mohamed Mokhtari, and Miloud Abbes Tahar. "Influence of contact parameters in fretting-fatigue contact 3D problems." Frattura ed Integrità Strutturale 15, no. 55 (2020): 228–40. http://dx.doi.org/10.3221/igf-esis.55.17.

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A numerical study on the influence of contact parameters on fretting fatigue behavior is carried out by using a new method SFEM (Stretching Finite Element Method) is presented in this article. Several parameters are made to vary: geometric shapes of the mesh, materials and contact parameters. The three-dimensional parametric model is composed by specimen and a pad in full contact. A Fortran Code is used to generate the parametric mesh. The stress intensity factors are calculated by varying the above contact parameters and the stress intensity factor under modes I, II and III are computed..

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9

Spinu, S., and D. Cerlinca. "Numerical simulation of elastic bilayered contact. Part I – Contact parameters." IOP Conference Series: Materials Science and Engineering 400 (September 18, 2018): 042054. http://dx.doi.org/10.1088/1757-899x/400/4/042054.

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10

Spinu, S., and D. Cerlinca. "The Fretting Contact of Coated Bodies. Part I – Contact Parameters." IOP Conference Series: Materials Science and Engineering 724 (January 11, 2020): 012026. http://dx.doi.org/10.1088/1757-899x/724/1/012026.

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11

Plohov, Igor, Alexander Ilyin, Oksana Kozyreva, and Igor Savraev. "The simulation model of sliding contact with three degrees of freedom and distributed parameters of the transition layer." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (June 16, 2015): 182. http://dx.doi.org/10.17770/etr2015vol1.229.

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The development of theoretical approaches to determining mechanical characteristics of sliding contacts by the creation of a simulation model of a sliding contact with three degrees of freedom and distributed parameters of the transition layer is considered. This model enables to obtain dynamic and integral characteristics of the sliding contact on design parameters given and characteristics of materials of contact pairs.

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12

McCarthy-McClean, Andrew. "Expanding parameters of care." Optician 271, no. 6995 (2025): 13. https://doi.org/10.12968/opti.2025.271.6995.13.

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13

Palchik, Vyacheslav. "Grain Boundary Parameters in Sandstone and Limestone." Defect and Diffusion Forum 312-315 (April 2011): 82–86. http://dx.doi.org/10.4028/www.scientific.net/ddf.312-315.82.

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In this paper, length of grain-to-grain contact, number of contacts per grain and ratios between the length of contacts and geometric characteristics of grains in heterogeneous Berea sandstone and Indiana limestone are studied. It is shown how hydrostatic pressure up to 40 MPa influences these grain boundary parameters. Observations show that there are different types of influence of hydrostatic pressure on grain boundary parameters in the studied sandstone and limestone.

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14

Petrov, E. P. "Method for Direct Parametric Analysis of Nonlinear Forced Response of Bladed Disks With Friction Contact Interfaces." Journal of Turbomachinery 126, no. 4 (2004): 654–62. http://dx.doi.org/10.1115/1.1776588.

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An effective method for direct parametric analysis of periodic nonlinear forced response of bladed disks with friction contact interfaces has been developed. The method allows, forced response levels to be calculated directly as a function of contact interface parameters such as the friction coefficient, contact surface stiffness (normal and tangential coefficients), clearances, interferences, and the normal stresses at the contact interfaces. The method is based on exact expressions for sensitivities of the multiharmonic interaction forces with respect to variation of all parameters of the fr

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15

Turgunov, K. K., N. U. Annaev, and Sh I. Khurramov. "Parameters of contact lines of rolls." Journal of Physics: Conference Series 2373, no. 7 (2022): 072003. http://dx.doi.org/10.1088/1742-6596/2373/7/072003.

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Abstract The article defines the parameters of the contact lines of the rolls. Calculation formulas are found for determining such parameters as the ratio of strain rates in roll pairs when the deformation of the semi-finished leather product and the coating of are given by rheological models. It was revealed that the forms of contact lines in roll pairs do not depend on the methods of specifying the deformation of the leather material and the coating of the rolls.

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16

Mistele, D., J. Aderhold, H. Klausing, et al. "Influence of pre-etching on specific contact parameters for metal-GaN contacts." Semiconductor Science and Technology 14, no. 7 (1999): 637–41. http://dx.doi.org/10.1088/0268-1242/14/7/309.

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17

Korolkov, Oleg, Natalja Sleptsuk, Toomas Rang, A. Syrkin, and Vladimir Dmitriev. "The Schottky Parameter Test for Combined Diffusion Welded and Sputter Large Area Contacts." Materials Science Forum 556-557 (September 2007): 737–40. http://dx.doi.org/10.4028/www.scientific.net/msf.556-557.737.

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For more authentic comparison of Schottky parameters between combined sputter (Ti/Ni/Au) and diffusion welded (DW) Al contact and direct DW Al contact to SiC the forward current-voltage characteristics were measured at the temperature range 293-473 K on full-packed 0.3 cm2 Schottky diodes. Surprising fact was discovered that the temperature behaviour of parameters remains of the same character for both kind of contacts but for the combined sputter- DW samples the values of parameters is much closer in magnitude to sputter contacts. Apparently, chemical treatment before the DW process preserves

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18

Verscheure, Diederik, Inna Sharf, Herman Bruyninckx, Jan Swevers, and Joris De Schutter. "Identification of Contact Parameters from Stiff Multi-point Contact Robotic Operations." International Journal of Robotics Research 29, no. 4 (2009): 367–85. http://dx.doi.org/10.1177/0278364909336805.

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19

Baeza, L., F. J. Fuenmayor, J. Carballeira, and A. Roda. "Influence of the wheel-rail contact instationary process on contact parameters." Journal of Strain Analysis for Engineering Design 42, no. 5 (2007): 377–87. http://dx.doi.org/10.1243/03093247jsa247.

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The rapid convergence of the tangential rolling contact parameters to their stationary values, combined with the high computational cost associated with calculations using instationary models, has meant that stationary models are usually employed in railway dynamics. However, the validity of stationary models when the applied contact conditions are subjected to rapid changes has not been sufficiently investigated. With the objective of deducing the effects of the evolution of the instationary process on the contact parameters, the tangential contact problem is solved for a set of reference con

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20

Koidl, H. P., W. F. Rieder, and Q. R. Salzmann. "Influence of contact material parameters on contact compatibility of organic vapors." IEEE Transactions on Components and Packaging Technologies 23, no. 2 (2000): 222–26. http://dx.doi.org/10.1109/6144.846757.

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21

Czapiewska, Marta, Piotr Bilski, Aleksandra Kruszka, Andrzej Winnicki, and Jerzy Krysiński. "Contact lenses – parameters, characteristics of the polymers." Farmacja Polska 74, no. 12 (2018): 722–26. http://dx.doi.org/10.32383/farmpol/118625.

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22

Puiu, George Constantin, and Vasile Puiu. "The Influence of the Operating Conditions on the Lubrication Regimes of Ball Screws." Applied Mechanics and Materials 371 (August 2013): 581–85. http://dx.doi.org/10.4028/www.scientific.net/amm.371.581.

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In point contact related applications (ball bearings, ball-screws) the minimum and the central film thickness of lubricant have a particular importance. The literature presents various numerical solutions to determine these parameters in the case of elliptical contacts [1-4]. Most of them refer to the fully developed elastohydrodynamic lubrication regime (EHD). Hamrock [5] proposes four different lubrication regimes depending on the size and importance of two physical phenomena that occur in contact: elastic deformation of the bodies in contact under a given load and lubricant viscosity variat

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23

Schurig, Sandra, Lucas Armster, Eric Steingruber, Sebastian Marx, and Wolfgang Sickenberger. "Temperaturabhängige Vermessung weicher Kontaktlinsen." Optometry & Contact Lenses 4, no. 1 (2023): 20–27. http://dx.doi.org/10.54352/dozv.dkor3596.

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Purpose. The study objective was to measure the tempera- ture-dependent change in the refractive index, base curve, and back vertex power of soft contact lenses. Material and Methods. For each material group according to ISO 18369-1 a representative soft contact lens brand was selected according to ISO 18369-1 (polymacon, nelfilcon A, ocufilcon D, balafilcon A, somofilcon A, lotrafilcon B). The parameters were measured in vitro at 20 °C and 35 °C. First, the refractive index was determined using the automatic refractometer (VariRef C, Schmidt + Haensch), followed by the base curve measurement

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24

Bahadirov, Gayrat, Kakhramon Aliboev, and Zukhriddin Absamatov. "Parameters of technological machine roll contact curves." E3S Web of Conferences 471 (2024): 03012. http://dx.doi.org/10.1051/e3sconf/202447103012.

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The main parameters of the contact curve of each roll are its shape and length, and the extent of the slip and no-slip zones. Analytical dependencies were obtained that determine the parameters of the contact curves of the rolls of technological machines. It was revealed that at the beginning of the contact zone the skin points are distant from the roll covering point, in the zone at the end of the contact zone it is ahead of it. At the end of the contact zone, the angle between the corresponding points of the skin layer and the roller coating is equal to the modulus of the difference between

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25

Berger, Clément, Daniel Alquier, and Jean François Michaud. "Optimisation of Ti Ohmic Contacts Formed by Laser Annealing on 4H-SiC." Materials Science Forum 1062 (May 31, 2022): 219–23. http://dx.doi.org/10.4028/p-6z36aj.

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This work is focused on the fabrication of Titanium-based ohmic contacts by Laser Thermal Annealing (LTA) on n-type silicon carbide (4H-SiC). Their morphologies and electrical properties were studied by using two sets of parameters impacting the laser pulse overlap. With both sets, the ohmic contact transition was reached. The high overlap conditions produced a massive degradation of the contact morphology by leaving uncovered SiC. An optimisation of the annealing parameters was successfully performed by reducing the overlap. With the low overlap configuration, a specific contact resistance of

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26

Mikosianchyk, O., O. Yakobchuk, R. Mnatsakanov, and A. Khimko. "Evaluation of operational properties of aviation oils by tribological parameters." Problems of tribology 99, no. 1 (2021): 43–50. http://dx.doi.org/10.31891/2079-1372-2021-99-1-43-50.

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The quality of aviation oils was evaluated online on the basis of their lubricating, antifriction, rheological and antiwear properties in the friction contact. The use of the software and hardware complex for evaluation of operational characteristics of triboelements is offered. Approbation of the proposed methodology was performed on aviation oils SM-9. The increase in antifriction properties of the “Bora B” SM-9 oil was established to be due to the formation of limiting adsorption layers of lubricant on friction-activated contact surfaces, which are characterized by low shear stresses of the

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Xiu, Shi Chao, Zhi Jie Geng, and Peng Bo Xiu. "Experimental Study on Point Grinding Technical Parameters Affecting Coolant Jet Parameters." Key Engineering Materials 416 (September 2009): 13–17. http://dx.doi.org/10.4028/www.scientific.net/kem.416.13.

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Point grinding is a new type of high and super-high speed grinding process with a point contact zone and less grinding force. Because of the lower grinding power, the grinding heat in point grinding process is much less than that of the conventional grinding process. Therefore, the less grinding coolant jet parameters can be used during point grinding process. That is very propitious to the environment and resource, as well as the green manufacturing. Based on the mathematic model of the edge contact area of point grinding, the simulations of the edge contact area with point grinding angles an

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28

Matlin, M. M., V. A. Kazankin, E. N. Kazankina, and E. V. Kapinosova. "INFLUENCE OF CONTACT PARAMETERS OF ROUGH SURFACES ON THE CONTACT THERMAL CONDUCTIVITY." Izvestia Volgograd State Technical University, no. 10 (2022): 62–64. http://dx.doi.org/10.35211/1990-5297-2022-10-269-62-64.

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Leitans, Armands, Oskars Linins, and Irina Boiko. "Contact Estimation Using 3D Surface Roughness Parameters." Key Engineering Materials 721 (December 2016): 373–77. http://dx.doi.org/10.4028/www.scientific.net/kem.721.373.

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This work is devoted to the elaboration of the new methodology for the wear parts contact estimation using 3D surface roughness parameters defined in the standard ISO 25178-2:2012 for friction and wear rate determination. In our research the random surface model was used, where the height of surface asperities h (x,y) has a normal probability distribution. As a result of research the equations for estimation of the elastic contact area and friction coefficient were derived. The existence of the correlation between friction coefficient and 3D surface roughness parameters was proven as well. The

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30

Turusov, R. A. "Adhesion Mechanics. Estimation of Contact-Layer Parameters." Polymer Science, Series D 15, no. 1 (2022): 1–9. http://dx.doi.org/10.1134/s1995421222010221.

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31

McCloskey, Rosemary M., Richard H. Liang, and Art F. Y. Poon. "Reconstructing contact network parameters from viral phylogenies." Virus Evolution 2, no. 2 (2016): vew029. http://dx.doi.org/10.1093/ve/vew029.

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32

HARRIS, MICHAEL G., CHESLYN M. GAN, TIMOTHY GRANT, TANIA LYCHO, and BRIEN A. HOLDEN. "Microwave Irradiation and Soft Contact Lens Parameters." Optometry and Vision Science 70, no. 10 (1993): 843–48. http://dx.doi.org/10.1097/00006324-199310000-00012.

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33

Gong, Yuqi, Jingfang Shen, Wenwei Liu, and Ling Chen. "Fractal Characteristics of Mechanical Interface Contact Parameters." MATEC Web of Conferences 175 (2018): 03009. http://dx.doi.org/10.1051/matecconf/201817503009.

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The contact performance of various mechanical parts has important influence on the static, dynamic and motion response of mechanical equipment. The characterization of rough surface topography is the basis for the study of friction, wear and contact deformation between mechanical bonding surfaces. By analyzing the various models of the characteristic parameters of mechanical interface, we provide a systematic research idea for the model of mechanical joint surface in the future. For further details on rough surface profile, the G-W model is put forward. Then the M-B model perfects its lack of

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34

Enyakov, A. M. "Measuring Vibration Parameters for Ultrasonic Contact Lithotripters." Measurement Techniques 59, no. 3 (2016): 303–9. http://dx.doi.org/10.1007/s11018-016-0962-9.

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35

Fan, Qiang, and Kaiyang Li. "Non-contact remote estimation of cardiovascular parameters." Biomedical Signal Processing and Control 40 (February 2018): 192–203. http://dx.doi.org/10.1016/j.bspc.2017.09.022.

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36

Marchak, F. M. "Non-contact physiological recording of ocular parameters." International Journal of Psychophysiology 85, no. 3 (2012): 311–12. http://dx.doi.org/10.1016/j.ijpsycho.2012.06.064.

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37

Królikowski, J., and J. Szczepek. "Prediction of contact parameters using ultrasonic method." Wear 148, no. 1 (1991): 181–95. http://dx.doi.org/10.1016/0043-1648(91)90216-h.

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38

Souza, Ronimack T., George R. S. Lira, Edson G. Costa, Adriano C. Oliveira, and Antonio F. Leite Neto. "Methodology for Circuit Breaker Contact Diagnosis through Dynamic Resistance Measurements and Fuzzy-Logic-Based Analysis." Energies 17, no. 8 (2024): 1869. http://dx.doi.org/10.3390/en17081869.

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This paper presents a methodology capable of measuring, processing, and extracting contact resistance parameters that enable the identification of the contact degradation level inside arc extinction chambers in medium- and high-voltage circuit breakers (CB). To determine the contact degradation level, an algorithm was developed to extract the characteristic parameters from the results of dynamic resistance measurement (DRM). To analyze the dataset parameters, this work employs the combination of different statistical tools, such as boxplots and fuzzy logic, enabling the evaluation to be conduc

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Tomov, Rade, and Mariya Aleksandrova. "Overview of the Metallization Approaches for Carbyne-Based Devices." Molecules 28, no. 17 (2023): 6409. http://dx.doi.org/10.3390/molecules28176409.

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Metallization for contacts in organic electronic nanodevices is of great importance for their performance. A lot of effects can appear at the contact/organic interface and modify the contact parameters, such as contact resistance, adhesive strength, and bonding ability. For novel materials, it is important to study the interactions with metal atoms to develop a suitable technology for contacts, fulfilling to the greatest extent the above-mentioned parameters. A novel material is carbyne, which is still under intensive research because of its great potential in electronics, especially for sensi

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40

Zuo, Xue, Mengdi Du, and Yuankai Zhou. "Influence of contact parameters on the coupling temperature of copper-brass electrical contacts." Engineering Failure Analysis 136 (June 2022): 106205. http://dx.doi.org/10.1016/j.engfailanal.2022.106205.

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Antonov, Andrii V., and Víctor G. Sychenko. "Resource evaluation of friction pair “contact wire – contact strip”." Archives of Transport 44, no. 4 (2017): 7–15. http://dx.doi.org/10.5604/01.3001.0010.6157.

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Purpose. Investigate the impact of current collection system parameters and external factors on the resource of friction pair “contact wire – contact strip”. Relevance. The level of electrified railways reliability depends on the reliability and durability of the individual objects of power supply system and the locomotive facilities, in turn, the current collection quality depends on design of contact network and pantographs, contact wires materials, contact strips and external influencing factors. The resource system “contact wire – contact strip” is an important technical and economic chara

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42

Hattori, Gabriel, and Alberto Luiz Serpa. "Influence of the Main Contact Parameters in Finite Element Analysis of Elastic Bodies in Contact." Key Engineering Materials 681 (February 2016): 214–27. http://dx.doi.org/10.4028/www.scientific.net/kem.681.214.

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One of the key issues in solving contact problems is the correct choice of the contact parameters. The contact stiffness, the penetration limit and the contact algorithm are some of the parameters that have to be adjusted. There are no methodologies available in the literature for choosing the contact parameters, relying only on the user experience for this important task. In this work we investigate how the contact parameters behave in a commercial finite element analysis software. We will show that while the contact stiffness has great influence on the finite element analysis, other paramete

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Martín, Gemma, Marta Bosch, Elisenda Coll, Robert G. Parton, Albert Pol, and Maria Calvo. "ContactJ: Lipid droplets-mitochondria contacts characterization through fluorescence microscopy and image analysis." F1000Research 10 (April 1, 2021): 263. http://dx.doi.org/10.12688/f1000research.51900.1.

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Lipid droplets (LDs) are the major lipid storage organelles of eukaryotic cells and together with mitochondria key regulators of cell bioenergetics. LDs communicate with mitochondria and other organelles forming “metabolic synapse” contacts to ensure that lipid supply occurs where and when necessary. Although transmission electron microscopy analysis allows an accurate and precise analysis of contacts, the characterization of a large number of cells and conditions can become a long-term process. In order to extend contact analysis to hundreds of cells and multiple conditions, we have combined

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Kingston, David C., and Stacey M. Acker. "Prediction of thigh-calf contact parameters from anthropometric regression." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 233, no. 4 (2019): 414–23. http://dx.doi.org/10.1177/0954411919832037.

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High knee flexion postures are common in industry and cultural practices, but the mechanical effect of intersegmental force, particularly thigh-calf contact force, on knee joint compressive force is poorly understood. Although some studies have measured thigh-calf contact parameters occurring in a number of high flexion postures, joint contact modeling would benefit from efforts to predict thigh-calf contact force for use in computational models. Therefore, this study assessed the strength of correlations and linear multiple regression models on the following five high flexion thigh-calf conta

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45

Ivanov, Valentin. "Analysis of Tire Contact Parameters Using Visual Processing." Advances in Tribology 2010 (2010): 1–11. http://dx.doi.org/10.1155/2010/491723.

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This paper discusses the application of noncontact methods to analyze the tire-surface contact interaction. This approach uses the tire test bench with the set of contact patch monitoring based on image processing procedures. The first part of this paper presents the results of experimental estimation of the contact patch area depending on the normal wheel load and inflation pressure for different car tires. The data were obtained for test bench conditions on the basis of the visual processing of tread footprint. Further, the contact length in the cohesion area during wheel rolling for single

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46

Adams, George G., Sinan Mu¨ftu¨, and Nazif Mohd Azhar. "A Scale-Dependent Model for Multi-Asperity Contact and Friction." Journal of Tribology 125, no. 4 (2003): 700–708. http://dx.doi.org/10.1115/1.1573232.

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As loading forces decrease in applications such as MEMS and NEMS devices, the size of the asperity contacts which comprise the real contact area tend to decrease into the nano scale regime. This reduction in size of the contacts is only partially offset by the nominally increased smoothness of these contacting surfaces. Because the friction force depends on the real area of contact, it is important to understand how the material and topographical properties of surfaces contribute to friction forces at this nano scale. In this investigation, the single asperity nano contact model of Hurtado and

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47

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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Sahli, R., G. Pallares, C. Ducottet, et al. "Evolution of real contact area under shear and the value of static friction of soft materials." Proceedings of the National Academy of Sciences 115, no. 3 (2018): 471–76. http://dx.doi.org/10.1073/pnas.1706434115.

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The frictional properties of a rough contact interface are controlled by its area of real contact, the dynamical variations of which underlie our modern understanding of the ubiquitous rate-and-state friction law. In particular, the real contact area is proportional to the normal load, slowly increases at rest through aging, and drops at slip inception. Here, through direct measurements on various contacts involving elastomers or human fingertips, we show that the real contact area also decreases under shear, with reductions as large as 30%, starting well before macroscopic sliding. All data a

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Bioglio, Livio, Mathieu Génois, Christian L. Vestergaard, Chiara Poletto, Alain Barrat, and Vittoria Colizza. "Recalibrating disease parameters for increasing realism in modeling epidemics in closed settings." BMC Infectious Diseases 16, no. 1 (2016): 676. https://doi.org/10.1186/s12879-016-2003-3.

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<strong>Background: </strong>The homogeneous mixing assumption is widely adopted in epidemic modelling for its parsimony and represents the building block of more complex approaches, including very detailed agent-based models. The latter assume homogeneous mixing within schools, workplaces and households, mostly for the lack of detailed information on human contact behaviour within these settings. The recent data availability on high-resolution face-to-face interactions makes it now possible to assess the goodness of this simplified scheme in reproducing relevant aspects of the infection dynam

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Khurramov, Shavkat, and Feruza Kurbanova. "Force parameters of roller machines." E3S Web of Conferences 417 (2023): 06011. http://dx.doi.org/10.1051/e3sconf/202341706011.

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To facilitate the force analysis of the roller machine under consideration, the previously obtained model of the pattern of distribution of normal contact forces is approximated by an empirical dependence. The moduli of the main vector of elementary normal and tangential forces of each roll, the main moments of elementary forces relative to the axis of each roll are determined. It is revealed that the qualitative distribution pattern of normal contact forces gives the magnitude of forces and moments, expressed through the maximum of the normal force.

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