Relevant bibliographies by topics / Interface à contact intermittent

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Interface à contact intermittent'

Author: Grafiati
Published: 19 January 2023

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Journal articles on the topic "Interface à contact intermittent"

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Labardi, M., P. Tripathi, S. Capaccioli, and R. Casalini. "Intermittent-contact local dielectric spectroscopy of nanostructured interfaces." Nanotechnology 33, no. 21 (2022): 210002. http://dx.doi.org/10.1088/1361-6528/ac52be.

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Abstract Local dielectric spectroscopy (LDS) is a scanning probe method, based on dynamic-mode atomic force microscopy (AFM), to discriminate dielectric properties at surfaces with nanometer-scale lateral resolution. Until now a sub-10 nm resolution for LDS has not been documented, that would give access to the length scale of fundamental physical phenomena such as the cooperativity length related to structural arrest in glass formers (2–3 nm). In this work, LDS performed by a peculiar variant of intermittent-contact mode of AFM, named constant-excitation frequency modulation, was introduced a
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Peng, Wei, James Kiely, and Yiao-Tee Hsia. "Wear Analysis of Head-Disk Interface During Contact." Journal of Tribology 127, no. 1 (2005): 171–79. http://dx.doi.org/10.1115/1.1843832.

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To achieve a higher storage density in a hard disk drive, the fly height of the air bearing slider, as part of the magnetic spacing, has to be minimized. At an ultralow fly height, the intermittent–continuous contact at the head–disk interface (HDI) is unavoidable and directly affects the mechanical and magnetic performance of the hard disk drive, and is of great interest. The HDI wear has a nonlinear and time-varying nature due to the change of contact force and roughness. To predict the HDI wear evolution, an iterative model of Coupled Head And Disk (CHAD) wear, is developed based on the con
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Lotfi, Mohammad, Saeid Amini, and Hossein Ashrafi. "Theoretical and numerical modeling of tool–chip friction in ultrasonic-assisted turning." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 4 (2018): 824–38. http://dx.doi.org/10.1177/0954408918812271.

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Decrease of friction in tool–chip contact zone is a key subject in metal cutting operation. Therefore, effect of ultrasonic vibration in this area is analyzed by using experimental and simulation methods. In this study, a theoretical model is firstly developed based on the shear friction model, and then sticking–sliding contact zones plus their contact lengths are defined in order to simulate conventional and ultrasonic-assisted turning. Accordingly, shear angle, sticky length, and cutting forces were measured in experiments as input parameters for the calculation of friction coefficients. As
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Ayala, Jose R. Ruiz, Kwangjin Lee, Mujibur Rahman, and J. R. Barber. "Effect of Intermittent Contact on the Stability of Thermoelastic Sliding Contact." Journal of Tribology 118, no. 1 (1996): 102–8. http://dx.doi.org/10.1115/1.2837063.

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In many sliding systems, the sliding surfaces are not coextensive, so that points on one surface experience alternating periods of contact and separation. This intermittent process can be expected to influence the sliding speed at which the system is susceptible to frictionally-induced thermoelastic instability (TEI). This question is explored in the context of a simple system consisting of a rotating thin-walled cylinder whose end face slides against a rigid surface. The results show that at low Fourier number—i.e., when the frequency of the process is high compared with the thermal transient
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Maeno, Takashi, and David B. Bogy. "Effect of the Rotor/Stator Interface Condition Including Contact Type, Geometry, and Material on the Performance of Ultrasonic Motor." Journal of Tribology 116, no. 4 (1994): 726–32. http://dx.doi.org/10.1115/1.2927326.

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The purpose of this paper is to show the dynamic contact characteristics and the motor performance of several types of ultrasonic motors. First, we compare the performance of “intermittent” and “traveling” contact type ultrasonic motors by using the locally deforming rotor model. We show that the motor performances are the same when the shape of the stator’s amplitude, and the rotor’s interpenetration are the same. Then, we show that the performance of these two types of motors are different according to the effects of inertia and actual three dimensional displacement by using the FE (finite e
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Polycarpou, A. A., and A. Soom. "A Two-Component Mixed Friction Model for a Lubricated Line Contact." Journal of Tribology 118, no. 1 (1996): 183–89. http://dx.doi.org/10.1115/1.2837076.

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A two-component, two-dimensional friction model for a lubricated line contact, operating in boundary and mixed lubrication regimes, is developed. The friction is explicitly decomposed into the solid and the fluid shear components. The solid component is due to the asperity interactions and the fluid shear arises from the lubricant present at the interface. The friction model includes the sliding velocity, the instantaneous separation of the sliding bodies, normal to the sliding direction, the normal load and fluid properties. The model is based on unsteady friction experiments carried out unde
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Li, Yufeng, and Aric R. Kumaran. "The Determination of Flash Temperature in Intermittent Magnetic Head/Disk Contacts Using Magnetoresistive Heads: Part II—Experimental Investigation." Journal of Tribology 115, no. 1 (1993): 179–84. http://dx.doi.org/10.1115/1.2920973.

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The flash temperature during intermittent head/disk contacts was measured using specially fabricated magnetoresistive heads. Microasperities were intentionally created on disk substrates, and ZrO2 was sputtered on disc surfaces as overcoat. It was found that with a disk spinning speed of 20 m/s, flash temperature could reach 50 to 100°C for transient contact (head was moving in disk radial direction), but less than 40°C for dwell on track contact (head was stationary). The contact times were in the range from submicroseconds to several microseconds, contact widths on the order of several micro
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Li, Yufeng, and Aric R. Kumaran. "The Determination of Flash Temperature in Intermittent Magnetic Head/Disk Contacts Using Magnetoresistive Heads: Part I—Model and Laser Simulation." Journal of Tribology 115, no. 1 (1993): 170–78. http://dx.doi.org/10.1115/1.2920972.

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The feasibility of using a magnetoresistive magnetic head to determine the flash temperature of intermittent magnetic head/disk contacts is investigated. A finite difference model is developed to study the effects of the magnetoresistive sensor height, the contact power intensity and the contact duration on the temperature response characteristics of the magnetoresistive sensor. A pulsed neody-minum:yttrium-aluminum-garnet laser is used as the heat source to simulate the contact and verify the model. The simulation results agree well with the theoretical model. Based on the theoretical model a
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Annakodi, Vivek Anand, Ramachandra Arvind Singh, Subramanian Jayalakshmi, et al. "Patterning SS304 Surface at Microscale to Reduce Wettability and Corrosion in Saline Water." Metals 12, no. 7 (2022): 1137. http://dx.doi.org/10.3390/met12071137.

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Stainless steel 304 (SS304) experiences corrosion when it is exposed to a saline atmosphere, which attains severity due to its high surface wettability. Topographical modification of metallic surfaces is an effective route to reduce wettability and thereby mitigate liquid-mediated corrosion. In this work, topographical modification of stainless steel 304 flat surface in the form of micropillars was done (pillar width: 100 μm, inter-pillar distance: 100 μm and height: 80 μm). Micropillars were fabricated by a chemical etching process. Wetting and corrosion of the micropillars was studied over l
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Santhosh, B., S. Narayanan, and C. Padmanabhan. "Nonlinear Dynamics of Shrouded Turbine Blade System with Impact and Friction." Applied Mechanics and Materials 706 (December 2014): 81–92. http://dx.doi.org/10.4028/www.scientific.net/amm.706.81.

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Dry friction dampers are passive devices used to reduce the resonant vibration amplitudes in turbine bladed systems. In shrouded turbine blade systems, in addition to the stick- slip motion induced by dry friction during the contact state in the tangential direction, the interface also undergoes intermittent separation in the normal direction. The problem can thus be treated as a combination of impact and friction. In this work, the dynamics of dry friction damped oscillators which are representative models of dry friction damped bladed system is investigated. A one dimensional contact model w
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Dissertations / Theses on the topic "Interface à contact intermittent"

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Cruz, Fierro Oscar Eduardo de la. "Contributions to the Study of Intermittent Contact Haptic Interfaces." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS071.

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Les interfaces à retour d'effort sont des systèmes robotisés permettant d'interagir gestuellement de façon naturelle avec des environnements virtuels ou distants. Ces dispositifs sont utilisés dans différents contextes tels que la téléopération (e.g. nucléaire, sous-marine, spatiale), le manufacturing, les jeux vidéo, l'éducation, la médecine ou la rééducation, pour ne citer que quelques exemples. Pour les applications en réalité virtuelle, les utilisateurs manipulent généralement ces interfaces à l'aide d'une poignée qui est reliée mécaniquement au robot. Ce lien a une influence importante pu
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Gonzalez, Franck. "Contributions au développement d'une interface haptique à contacts intermittents." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066068/document.

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Les interfaces haptiques permettent à un opérateur d'interagir avec un environnement virtuel ou distant via le sens du toucher.La majorité des interfaces de l'état de l'art restent au contact de l’utilisateur pendant toute la durée de la manipulation. La liaison permanente entre le robot et l’opérateur nuit à la qualité de l’interaction, notamment en réduisant la transparence en espace libre. Ce problème est d’autant plus prégnant dans le cadre des interfaces haptiques dextres.Cette thèse a pour objectif d'étudier la possibilité d'augmenter la transparence et le réalisme de l'interaction à tra
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Guda, Vamsi Krishna. "Contributions à l'utilisation de cobots comme interfaces haptiques à contact intermittent en réalité virtuelle." Thesis, Ecole centrale de Nantes, 2022. http://www.theses.fr/2022ECDN0033.

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La réalité virtuelle (RV) est de plus en plus utilisée dans des simulations industrielles mais la possibilité de toucher les objets manque rapidement par exemple pour juger de la qualité perçue dans la conception de véhicule automobile. Les interfaces haptiques actuels ne permettent de restituer aisément la notion de texture, l’approche envisagée est donc une interface à contact intermittent. Un cobot vient positionner une surface mobile à l’endroit du contact avec un objet virtuel pour permettre un contact physique avec la main de l’opérateur.Les contributions de cette thèse portent sur plusi
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Mercado, Garcia Victor Rodrigo. "Contribution to the Study of Usability and Haptic Feedback of Encountered-Type Haptic Displays." Thesis, Rennes, INSA, 2021. https://tel.archives-ouvertes.fr/tel-03789676.

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Les interfaces à contact intermittent (ICIs) sont des dispositifs robotisés qui suivent la main de l'utilisateur et se placent en position de rencontre lorsque l'utilisateur souhaite toucher des objets dans une réalité virtuelle (RV) immersive. Malgré ces avantages, plusieurs défis doivent encore être résolus en matière d'utilisabilité et de retour haptique. Cette thèse présente une série de contributions pour tirer profit des ICIs à travers des axes de recherche l'utilisabilité et le retour haptique.La première contribution dans l'axe de l'utilisabilité a étudié la conception de techniques de
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Chabrier, Anthony. "Etude théorique et expérimentale d'une interface à retour d'effort augmenté." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066383/document.

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Les interactions physiques comportent divers gestes dextres et sont sources d’échanges d’informations très variées. Différentes interfaces haptiques ont été développées pour reproduire ces mouvements dextres et ces interactions. Cependant il est impossible actuellement de concevoir une interface simulant tous les types d’interactions avec un retour haptique réaliste. Je propose d’identifier les interactions les plus importantes et les zones de la main les plus intéressantes à stimuler, et ensuite d’étudier comment associer certains dispositifs pour améliorer le ressenti de l’utilisateur. Il se
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Dubourg, Fabien. "Nanomécanique et dynamique des polymères par microscopie de force en contact intermittent." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2002. http://tel.archives-ouvertes.fr/tel-00007198.

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Ce mémoire présente une étude des propriétés de polymères à petite (nano) échelle, par les modes de modulation d'amplitude (« Tapping ») et de modulation de fréquence (« Non-contact » résonant) de la Microscopie à Force Atomique. Il débute par la détermination des origines physiques du contraste d'images obtenues sur une surface de copolymère tri- séquencé : la reconstruction d'une section d'image grâce aux courbes d'approche- retrait permet d'en attribuer le contraste aux seules variations de la réponse viscoélastique du copolymère (i.e. de montrer l'absence de contribution topographique au c
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Dubourg, Fabien. "Nanomécanique et dynamique des polymères par microscopie de force en contact intermittent." Phd thesis, Bordeaux 1, 2002. http://www.theses.fr/2002BOR12630.

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Ce travail est une étude des propriétés de matériaux polymères à l'échelle du nanomètre par les modes dynamiques de modulation d'amplitude dit " Tapping " et de modulation de fréquence dit " Non-Contact Résonant" de la microscopie à force atomique. Il débute par la détermination des origines physiques du contraste d'images obtenues sur des surfaces de coplymères triséquencés. Ce contraste se révèle être dû aux variations nanométriques des propriétés viscoélastiques. L'étape suivante est une évaluation des constantes physiques des deux nanophases du copolymère triséquencé par l'analyse des cour
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Jason, Bronwin Anastasia. "An adaptive user interface model for contact centres." Thesis, Nelson Mandela Metropolitan University, 2008. http://hdl.handle.net/10948/989.

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Contact centres (CC), are the primary interaction point between a company and its customers and these are rapidly expanding in terms of both workforce and economic scope. An important challenge for today's CC solutions is to increase the speed at which CCAs retrieve information to answer customer queries. CCAs, however, differ in their ability to respond to these queries and do not interact with the computer user interface (UI) in the same way as they each have different capabilities, experience and expertise. Studies have provided empirical support that user performance can be increased when
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Quinn, Amy May. "The study of contact phenomena using ultrasound." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271847.

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Singh, Akash. "An intelligent user interface model for contact centre operations." Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/d1011399.

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Contact Centres (CCs) are at the forefront of interaction between an organisation and its customers. Currently, 17 percent of all inbound calls are not resolved on the first call by the first agent attending to that call. This is due to the inability of the contact centre agents (CCAs) to diagnose customer queries and find adequate solutions in an effective and efficient manner. The aim of this research is to develop an intelligent user interface (IUI) model to support and improve CC operations. A literature review of existing IUI architectures, modelbased design and existing CC software toget
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Books on the topic "Interface à contact intermittent"

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Kikuchi, Masato. A non-contact computer interface. UMIST, 1994.

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(Firm), Knovel, ed. Wheel-rail interface handbook. CRC Press, 2009.

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Vladimír, Kolář. Contact stress and settlement in the structure-soil interface. Academia, 1991.

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Association, International Heavy Haul. Guidelines to best practices for heavy haul railway operations: Wheel and rail interface issues. International Heavy Haul Association, 2001.

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McKay, Iain. The strategic desktop: Usability engineering for the contact centre workstation. Spotlight, 2003.

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Clack, Timothy, and Marcus Brittain. Archaeologies of Cultural Contact: At the Interface. Oxford University Press, 2022.

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Olofsson, U., and Lewis R. Wheel-Rail Interface Handbook. Elsevier Science & Technology, 2009.

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R, Lewis. Wheel - Rail Interface Handbook. Taylor & Francis Group, 2009.

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Lipski, John M. Palenquero and Spanish in Contact: Exploring the Interface. Benjamins Publishing Company, John, 2020.

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Lipski, John M. Palenquero and Spanish in Contact: Exploring the Interface. Benjamins Publishing Company, John, 2020.

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Book chapters on the topic "Interface à contact intermittent"

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Voigtländer, Bert. "Intermittent Contact Mode/Tapping Mode." In Scanning Probe Microscopy. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-45240-0_15.

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Voigtländer, Bert. "Intermittent Contact Mode/Tapping Mode." In Atomic Force Microscopy. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13654-3_14.

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Tadros, Tharwat. "Contact Angle." In Encyclopedia of Colloid and Interface Science. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-20665-8_55.

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Storz, Matthias, and Peter Vielsack. "Numerical Sensitivity of a Dynamical System with Dry Friction and Unilateral and Intermittent Constraints." In Contact Mechanics. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-1983-6_58.

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Collins, W. D., M. S. Khalil, S. Quegan, D. Smith, and D. A. W. Taylor. "Interface Pressures in Contact Zones." In European Consortium for Mathematics in Industry. Vieweg+Teubner Verlag, 1992. http://dx.doi.org/10.1007/978-3-663-09834-8_20.

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Wang, Yansong. "Friction in Conformal Contact Interface." In Encyclopedia of Tribology. Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_31.

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Langbein, Dieter. "Interface Tension and Contact Angle." In Springer Tracts in Modern Physics. Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45267-2_2.

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Fitzgerald, R. H. "Calcar/Collar Contact in Cemented Total Hip Arthroplasty." In Implant Bone Interface. Springer London, 1990. http://dx.doi.org/10.1007/978-1-4471-1811-4_20.

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Pastor, Elsa. "Direct Flame Contact." In Encyclopedia of Wildfires and Wildland-Urban Interface (WUI) Fires. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-51727-8_64-1.

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Pastor, Elsa. "Direct Flame Contact." In Encyclopedia of Wildfires and Wildland-Urban Interface (WUI) Fires. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-52090-2_64.

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Conference papers on the topic "Interface à contact intermittent"

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Mugisha, Stanley, Matteo Zoppi, Rezia Molfino, Vamsi Guda, Christine Chevallereau, and Damien Chablat. "Safe Collaboration Between Human and Robot in a Context of Intermittent Haptique Interface." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-71518.

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Abstract In the list of interfaces used to make virtual reality, haptic interfaces allow users to touch a virtual world with their hands. Traditionally, the user’s hand touches the end effector of a robotic arm. When there is no contact, the robotic arm is passive; when there is contact, the arm suppresses mobility to the user’s hand in certain directions. Unfortunately, the passive mode is never completely seamless to the user. Haptic interfaces with intermittent contacts are interfaces using industrial robots that move towards the user when contact needs to be made. As the user is immersed v
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Peng, Wei, James Kiely, and Yiao-Tee Hsia. "Wear Analysis of Head-Disk Interface During Contact." In ASME/STLE 2004 International Joint Tribology Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/trib2004-64050.

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To achieve a higher storage density in a hard disk drive, the fly height of the air bearing slider, as part of the magnetic spacing, has to be minimized. At an ultra-low fly height, the intermittent / continuous contact at the head–disk interface (HDI) is unavoidable and directly affects the mechanical and magnetic performance of the hard disk drive, and is of great interest. The HDI wear has a non-linear and time-varying nature due to the change of contact force and roughness. To predict the HDI wear evolution, an iterative model of Coupled Head And Disk (CHAD) wear, is developed based on the
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Petrov, E. P. "Multiharmonic Analysis of Nonlinear Whole Engine Dynamics With Bladed Disc-Casing Rubbing Contacts." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68474.

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A method has been developed for frequency domain analysis of steady state forced response in gas turbine engines in the presence of rubbing and snubbing contacts between bladed discs and casing and between other rotor and stator engine components. The multiharmonic contact interface elements have been derived for modelling the nonlinear contact interactions: (i) at bearings and (ii) bladed disc-casing rubbing contacts with using flexible models for rotor and stator structures. The elements allow for the asymmetry of the casing, the discrete blade contacts with casing, individual blade-casing g
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Ito, Takahiro, Jun Shimizu, Hideyuki Nakayama, and Yutaka Kukita. "Effects of Contact Line Condition on Excitation of Internal Waves Confined by a Cylindrical Wall." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49187.

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Standing internal waves can be excited when fluids overlaid in a stationary enclosure are subjected to harmonic, vertical oscillations. The oscillatory deformation of the fluid-fluid interface near the wall, due to the limited mobility of the fluid-fluid-wall contact line, can play an important role in the excitation of waves. The contact line may or may not move depending on the amplitude of fluid excitation. When it moves, it may do so only in a limited portion of each cycle. We analyze numerically the wave excitation associated with such nonlinear, intermittent motions of the contact line.
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Chuprakov, Dimitry, and Romain Prioul. "Hydraulic Fracture Height Containment by Weak Horizontal Interfaces." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173337-ms.

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Abstract Weak formation bedding planes create a unique mechanism for hydraulic fracture height containment. They arrest the vertical growth of hydraulic fracture. The propagation across them may or may not occur. To quantify this fracture behavior, first we developed an analytical model of the elastic T-shaped fracture contact with frictional and cohesional interfaces. The model evaluates the fracture blunting and the shear activation of the interfaces. It predicts the buildup of the net pressure necessary for the fracture to cross the given interface. Next we conduct numerical simulations of
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Frammelsberger, Werner, Guenther Benstetter, Thomas Schweinboeck, Richard Stamp, and Janice Kiely. "Advanced Analysis of Thin and Ultrathin SiO2 Films and SiO2/Si Interfaces with Combined Atomic Force Microscopy Methods." In ISTFA 2003. ASM International, 2003. http://dx.doi.org/10.31399/asm.cp.istfa2003p0406.

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Abstract In this work a procedure is presented to look beneath the surface of a SiO2 film and to study the impact of the SiO2/Si interface morphology on the tunneling current, with high lateral resolution, by use of combined Conductive Atomic Force Microscopy (C-AFM) and Intermittent-Contact AFM (IC-AFM) measurements. Evidence is given that interface structures do have direct influence on the distribution of high current spots in MOS capacitors.
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Wang, Zhaofeng. "Flip-Chip Bump Interface Failure Mechanisms In Plastic BGA Packages and Failure Analysis Process Flow." In ISTFA 2008. ASM International, 2008. http://dx.doi.org/10.31399/asm.cp.istfa2008p0036.

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Abstract The present paper studies several failure mechanisms at both UBM and Cu substrate side for flip-chip die open contact failures in multi-chip-module plastic BGA-LGA packages. A unique failure analysis process flow, starting from non-disturbance inspection of x-ray, substrate and die level C-SAM, bump x-section followed by a bump interface integrity test including under-fill etching and bump pull test and/or substrate etch has been developed. Four different types of failure mechanism in multiple chip module that are associated with open/intermittent contact, ranging from device layout d
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Kiely, James, and Yiao-Tee Hsia. "A Novel Method of Characterizing Slider Dynamic Motion During Intermittent Head-Disk Contact." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63195.

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Characterization of slider motion induced by contact is becoming a critical aspect of developing advanced head-disc interfaces. While vertical motion induced by contact has been studied, very little is known about down-track motion. We have introduced a new technique where the down-track motion is captured and the dynamics in three dimensions are analyzed. We have applied this technique to measure the position of a slider as it transitions from flying to making full contact with the media surface. We find that slider motion varies considerably with varying levels of interference and that motio
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Gu, Weiwei, Zili Xu, and Lv Qiang. "Forced Response of Shrouded Blades With Intermittent Dry Friction Force." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51041.

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The gap friction damper model is presented in this paper, which is employed to simulate the friction forces at the contact points of the shroud interface. Using the harmonic balance method (HBM), the friction force can be approximated by a series of harmonic functions. The governing differential equations of blade motion are transformed into a set of nonlinear algebraic equations, which can be solved iteratively to yield the steady-state response. The results show that the forced response is attenuated due to the additional damping introduced by frictional slip. The predicted results agree wel
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Lee, Sung-Chang, and Andreas A. Polycarpou. "Predicting Fly-Height Modulation and Contact Forces in Ultra-Low Flying Head-Disk Interfaces Using a Tri-State Switching Dynamic Contact Model." In STLE/ASME 2001 International Joint Tribology Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/trib-nano2001-104.

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Abstract In order to achieve higher recording densities up to 1 Tbit/In2 using conventional recording technologies, the recording slider will need to “fly” within 5 nm or less from the rotating disk. In such ultra-low flying height regimes, intermittent head/disk contact is unavoidable. Head/disk contact can cause large vibrations of the recording slider in the normal and lateral (off-track) directions as well as damage the disk due to large dynamic contact forces. This paper describes a simple continuum mechanics-based model that includes the dynamics of a flying head/disk interface (HDI) as
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Reports on the topic "Interface à contact intermittent"

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McMichael, L. Contact Interface Verification for DYNA3D Scenario 1: Basic Contact. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/898003.

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McMichael, L. Contact Interface Verification for DYNA3D Scenario 2: Multi-Surface Contact. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/898011.

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Khounsary, A. M., D. Chojnowski, L. Assoufid, and W. M. Worek. Thermal contact resistance across a copper-silicon interface. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/554855.

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Phelan, P. E., R. C. Niemann, and T. H. Nicol. Thermal contact resistance for a CU/G-10CR interface in a cylindrical geometry. Office of Scientific and Technical Information (OSTI), 1996. http://dx.doi.org/10.2172/285441.

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Lever, James, Susan Taylor, Arnold Song, Zoe Courville, Ross Lieblappen, and Jason Weale. The mechanics of snow friction as revealed by micro-scale interface observations. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42761.

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The mechanics of snow friction are central to competitive skiing, safe winter driving and efficient polar sleds. For nearly 80 years, prevailing theory has postulated that self-lubrication accounts for low kinetic friction on snow: dry-contact sliding warms snow grains to the melting point, and further sliding produces meltwater layers that lubricate the interface. We sought to verify that self-lubrication occurs at the grain scale and to quantify the evolution of real contact area to aid modeling. We used high-resolution (15 μm) infrared thermography to observe the warming of stationary snow
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Mozley, Peter, James Evans, and Thomas Dewers. Area of Interest 1, CO2 at the Interface: Nature and Dynamics of the Reservoir/Caprock Contact and Implications for Carbon Storage Performance. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1177773.

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Lever, James, Susan Taylor, Garrett Hoch, and Charles Daghlian. Evidence that abrasion can govern snow kinetic friction. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42646.

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The long-accepted theory to explain why snow is slippery postulates self-lubrication: frictional heat from sliding melts and thereby lubricates the contacting snow grains. We recently published micro-scale interface observations that contradicted this explanation: contacting snow grains abraded and did not melt under a polyethylene slider, despite low friction values. Here we provide additional observational and theoretical evidence that abrasion can govern snow kinetic friction. We obtained coordinated infrared, visible-light and scanning-electron micrographs that confirm that the evolving sh
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Lever, James, Emily Asenath-Smith, Susan Taylor, and Austin Lines. Assessing the mechanisms thought to govern ice and snow friction and their interplay with substrate brittle behavior. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/1168142742.

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Sliding friction on ice and snow is characteristically low at temperatures common on Earth’s surface. This slipperiness underlies efficient sleds, winter sports, and the need for specialized tires. Friction can also play micro-mechanical role affecting ice compressive and crushing strengths. Researchers have proposed several mechanisms thought to govern ice and snow friction, but directly validating the underlying mechanics has been difficult. This may be changing, as instruments capable of micro-scale measurements and imaging are now being brought to bear on friction studies. Nevertheless, gi
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Heymsfield, Ernie, and Jeb Tingle. State of the practice in pavement structural design/analysis codes relevant to airfield pavement design. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/40542.

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An airfield pavement structure is designed to support aircraft live loads for a specified pavement design life. Computer codes are available to assist the engineer in designing an airfield pavement structure. Pavement structural design is generally a function of five criteria: the pavement structural configuration, materials, the applied loading, ambient conditions, and how pavement failure is defined. The two typical types of pavement structures, rigid and flexible, provide load support in fundamentally different ways and develop different stress distributions at the pavement – base interface
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Shmulevich, Itzhak, Shrini Upadhyaya, Dror Rubinstein, Zvika Asaf, and Jeffrey P. Mitchell. Developing Simulation Tool for the Prediction of Cohesive Behavior Agricultural Materials Using Discrete Element Modeling. United States Department of Agriculture, 2011. http://dx.doi.org/10.32747/2011.7697108.bard.

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The underlying similarity between soils, grains, fertilizers, concentrated animal feed, pellets, and mixtures is that they are all granular materials used in agriculture. Modeling such materials is a complex process due to the spatial variability of such media, the origin of the material (natural or biological), the nonlinearity of these materials, the contact phenomenon and flow that occur at the interface zone and between these granular materials, as well as the dynamic effect of the interaction process. The lack of a tool for studying such materials has limited the understanding of the phen
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