Log in

Relevant bibliographies by topics / Contact patch shape / Journal articles

To see the other types of publications on this topic, follow the link: Contact patch shape.

Journal articles on the topic 'Contact patch shape'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Contact patch shape.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Marshall, M. B., R. Lewis, R. S. Dwyer-Joyce, U. Olofsson, and S. Björklund. "Experimental Characterization of Wheel-Rail Contact Patch Evolution." Journal of Tribology 128, no. 3 (2006): 493–504. http://dx.doi.org/10.1115/1.2197523.

Full text

Abstract:

The contact area and pressure distribution in a wheel/rail contact is essential information required in any fatigue or wear calculations to determine design life, re-grinding, and maintenance schedules. As wheel or rail wear or surface damage takes place the contact patch size and shape will change. This leads to a redistribution of the contact stresses. The aim of this work was to use ultrasound to nondestructively quantify the stress distribution in new, worn, and damaged wheel-rail contacts. The response of a wheel/rail interface to an ultrasonic wave can be modeled as a spring. If the cont

APA, Harvard, Vancouver, ISO, and other styles

2

De Beer, Morris, James W. Maina, Yvette van Rensburg, and Jan M. Greben. "Toward Using Tire-Road Contact Stresses in Pavement Design and Analysis." Tire Science and Technology 40, no. 4 (2012): 246–71. http://dx.doi.org/10.2346/tire.12.400403.

Full text

Abstract:

ABSTRACT: Optimization of road pavement design, especially close to the surface of the pavement, requires a more rational approach, which will inevitably include modeling of truck tire-road contact stresses. Various road-surfacing failures have been recorded as evidence that the traditional road pavement engineering tire model idealized by a single uniformly distributed vertical contact stress of circular shape may be inadequate to properly explain and assist in the design against road surface failures. This article therefore discusses the direct measurement of three-dimensional (3D) tire pave

APA, Harvard, Vancouver, ISO, and other styles

3

Ovaert, T. C. "On the Indentation of a Transversely Isotropic Half-Space With Application to Thin Solid Lubricant Films." Journal of Tribology 115, no. 4 (1993): 650–57. http://dx.doi.org/10.1115/1.2921689.

Full text

Abstract:

In this investigation, the contact between a model rigid ellipsoidal asperity and the surface of an oriented solid lubricant film has been simulated using an analysis developed previously for contact of a transversely isotropic half-space. In this case, unlike most previous work, the plane of isotropy is oriented normal to the plane of contact, instead of parallel. Under this condition, the contact patch is of a general elliptical form, depending on the shape and orientation of the model asperity and on the elastic constants of the solid lubricants. Several applicable material compositions are

APA, Harvard, Vancouver, ISO, and other styles

4

WILSON, S. K., B. R. DUFFY, and S. H. DAVIS. "On a slender dry patch in a liquid film draining under gravity down an inclined plane." European Journal of Applied Mathematics 12, no. 3 (2001): 233–52. http://dx.doi.org/10.1017/s095679250100417x.

Full text

Abstract:

In this paper two similarity solutions describing a steady, slender, symmetric dry patch in an infinitely wide liquid film draining under gravity down an inclined plane are obtained. The first solution, which predicts that the dry patch has a parabolic shape and that the transverse profile of the free surface always has a monotonically increasing shape, is appropriate for weak surface-tension effects and far from the apex of the dry patch. The second solution, which predicts that the dry patch has a quartic shape and that the transverse profile of the free surface has a capillary ridge near th

APA, Harvard, Vancouver, ISO, and other styles

5

Hryciów, Z., J. Jackowski, and M. Żmuda. "The Influence of Non-Pneumatic Tyre Structure on its Operational Properties." International Journal of Automotive and Mechanical Engineering 17, no. 3 (2020): 8168–78. http://dx.doi.org/10.15282/ijame.17.3.2020.10.0614.

Full text

Abstract:

A non-pneumatic tyre (NPT) is a novel type of safety tyre that is designed to provide similar elastic properties to those offered by conventional pneumatic tyres. The main advantage of NPT is the lack of compressed air (like in a pneumatic tire) to ensure adequate traction forces and directional control. Suitable materials and the appropriate geometry of the supporting structure allows to achieve properties provides by pneumatic tires. Flexible spokes and closed structure like honeycomb are the most common solutions of supporting structure. Appropriate geometry, thickness and materials of this

APA, Harvard, Vancouver, ISO, and other styles

6

Kamai, Kazuto, and Ryosuke Matsuzaki. "20409 Measuring shape of tire contact patch and estimating coefficient of friction using triaxial acceleration meter." Proceedings of Conference of Kanto Branch 2015.21 (2015): _20409–1_—_20409–2_. http://dx.doi.org/10.1299/jsmekanto.2015.21._20409-1_.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Kamai, Kazuto, and Ryosuke Matsuzaki. "PS06 Measuring shape of tire contact patch and estimating road friction coefficient usin triaxial acceleration meter." Proceedings of the Materials and Mechanics Conference 2014 (2014): _PS06–1_—_PS06–3_. http://dx.doi.org/10.1299/jsmemm.2014._ps06-1_.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

KAMAI, Kazuto, and Ryosuke MATSUZAKI. "J0450401 Measuring shape of tire contact patch and estimating road surface condition using an acceleration meter." Proceedings of Mechanical Engineering Congress, Japan 2014 (2014): _J0450401——_J0450401—. http://dx.doi.org/10.1299/jsmemecj.2014._j0450401-.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

KAMAI, Kazuto, and Ryosuke MATSUZAKI. "223 Measuring shape of tire contact patch and estimating road surface condition using triaxial acceleration meter." Proceedings of the Materials and processing conference 2013.21 (2013): _223–1_—_223–3_. http://dx.doi.org/10.1299/jsmemp.2013.21._223-1_.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sarkisov, Pavel, Günther Prokop, Jan Kubenz, and Sergey Popov. "Physical Understanding of Transient Generation of Tire Lateral Force and Aligning Torque." Tire Science and Technology 47, no. 4 (2019): 308–33. http://dx.doi.org/10.2346/tire.19.180192.

Full text

Abstract:

ABSTRACT Increasing vehicle performance requirements and virtualization of the development process require more understanding of the physical background of tire behavior, especially in transient rolling conditions with combined slip. The focus of this research is the physical description of the transient generation of tire lateral force and aligning torque. Apart from tire force and torque measurements, two further issues were investigated experimentally. Using acceleration measurement on the tire inner liner, it was observed that the contact patch shape of the rolling tire changes nonlinearly

APA, Harvard, Vancouver, ISO, and other styles

11

Aymerich, Francesco, and Massimiliano Pau. "Assessment of Nominal Contact Area Parameters by Means of Ultrasonic Waves." Journal of Tribology 126, no. 4 (2004): 639–45. http://dx.doi.org/10.1115/1.1760764.

Full text

Abstract:

In this paper the application of an ultrasonic method to evaluate size and shape of the nominal contact area between two contacting bodies is studied. The technique is based on the analysis of the quota of the ultrasonic wave reflected by the interface, which may be related to the level of contact between the surfaces. A simple deconvolution procedure is applied to the raw ultrasonic data so as to remove the blurring effect introduced by the ultrasonic beam size. The ultrasonic data acquired on a simple sphere-plane contact interface are compared with those obtained by means of a commercial pr

APA, Harvard, Vancouver, ISO, and other styles

12

Zaydess, Semen, Nguen Van Hin, and Igor Bobrovskij. "Forming a regular surface topography of a cylindrical part using oscillating ironing." MATEC Web of Conferences 297 (2019): 02009. http://dx.doi.org/10.1051/matecconf/201929702009.

Full text

Abstract:

A new technological practice for the formation of a regular surface topography by means of oscillating ironing is presented. The results are based on analytical calculations and experimental studies. Surface topography after oscillating ironing depends on workpiece rotation frequency, deforming tool advance, oscillation frequency, deforming tool amplitude and tilt angle. The influence of the oscillating ironing process parameters on the size and shape of contact patch is confirmed.

APA, Harvard, Vancouver, ISO, and other styles

13

Xi, Li, Yang Lin, and Wang Min. "Novel design of strip line L-shape probe-fed wideband metallic contact stacked patch antenna for GNSS application." Journal of Electromagnetic Waves and Applications 27, no. 16 (2013): 2010–19. http://dx.doi.org/10.1080/09205071.2013.830076.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Sakalo, V. I., and A. V. Sakalo. "Criteria for predicting the initiation of rolling contact fatigue damage in the railway wheels and rails." Vestnik of the Railway Research Institute 78, no. 3 (2019): 141–48. http://dx.doi.org/10.21780/2223-9731-2019-78-3-141-148.

Full text

Abstract:

The development of the methods for modeling the processes of accumulation of the rolling contact fatigue damage and wear of the wheels of the railway rolling stock and the rails is particularly relevant due to the increase in the number of damage in the recent times. The work is underway to improve the chemical composition and the technology of production of the wheel and rail steels in order to improve their mechanical properties and ability to resist the action of the cyclic loads. The methods of modeling allow predict the possibility of initiation of the fatigue cracks during operation with

APA, Harvard, Vancouver, ISO, and other styles

15

Dolwichai, T., J. Limtragool, and S. Bureerat. "Optimization of a Triangular Slot Shape in a Tire Tread Block by Using the Finite Element Analysis and MPSO." Advanced Materials Research 505 (April 2012): 424–28. http://dx.doi.org/10.4028/www.scientific.net/amr.505.424.

Full text

Abstract:

The work of this paper presents the use of MPSO which is an evolutionary optimizer. The work objective is finding the optimal shape of triangular slot in a tire tread block. The numbers of design parameters with triangular slot are 9. They are used to characterize size and position of the triangular slot in a tire tread block. The optimization methods are implemented to solve two objectives. First, the normal contact stress at contact patch region must be lowest and second, the friction contact stress at the same region must be highest. Therefore, the problem type is bi-objective optimization.

APA, Harvard, Vancouver, ISO, and other styles

16

Xu, Jingmang, Ping Wang, Xiaochuan Ma, Jieling Xiao, and Rong Chen. "Comparison of calculation methods for wheel–switch rail normal and tangential contact." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 231, no. 2 (2016): 148–61. http://dx.doi.org/10.1177/0954409715624939.

Full text

Abstract:

Wheel–rail contact is more complex in railway a turnout than in ordinary track and, thus, necessitates an advanced model to simulate dynamic interaction and predict rail wear. The main aim of the present work is to assess the application of several wheel–rail rolling contact models in railway turnout. For normal contact problems, wheel–rail contact models based on four different methods are compared: Hertz theory, the semi-Hertzian method, CONTACT, and the finite element method. The assessment is based on the results of contact patch shape and size and contact pressure for several wheelset lat

APA, Harvard, Vancouver, ISO, and other styles

17

Pau, Massimiliano, Bruno Leban, and Antonio Baldi. "Ultrasonic Measurements of Contact Area and Pressure Distribution of a Pneumatic Tire on a Rigid Surface3." Tire Science and Technology 36, no. 1 (2008): 43–62. http://dx.doi.org/10.2346/1.2804126.

Full text

Abstract:

Abstract Contact phenomena which occur at the tire-ground interface play a crucial role in most issues related to optimal performances of the vehicle, safety, comfort, and energy consumption. Thus, it is essential to have available experimental tools capable of supplying detailed information about the main contact parameters (size and shape of nominal contact area and contact pressure distribution), especially when unknown or unpredictable external conditions make it difficult to use numerical tools in assessing them. Although a number of laboratory techniques have been devised to address this

APA, Harvard, Vancouver, ISO, and other styles

18

Lu, Yongjie, Yun Yang, Jianxi Wang, and Bowen Zhu. "Optimization and Design of a Railway Wheel Profile Based on Interval Uncertainty to Reduce Circular Wear." Mathematical Problems in Engineering 2020 (October 20, 2020): 1–10. http://dx.doi.org/10.1155/2020/9579510.

Full text

Abstract:

Wheel tread wear is a form of wheel damage that can seriously affect the performance of freight vehicles. A new numerical approach to optimizing wheel profiles can reduce circular wear on the LM wheel in the design cycle. This approach considers the influence of different line conditions and speed fluctuation on wheel wear, along with the performance of the wheel and the rail as the materials wear. In this approach, a nonlinear numerical optimization model for the wheel tread profile is built through a backpropagation (BP) neural network method. The multipoint Kik–Piotrowski (KP) contact mecha

APA, Harvard, Vancouver, ISO, and other styles

19

Kanoulas, Dimitrios, Jinoh Lee, Darwin G. Caldwell, and Nikos G. Tsagarakis. "Visual Grasp Affordance Localization in Point Clouds Using Curved Contact Patches." International Journal of Humanoid Robotics 14, no. 01 (2017): 1650028. http://dx.doi.org/10.1142/s0219843616500286.

Full text

Abstract:

Detecting affordances on objects is one of the main open problems in robotic manipulation. This paper presents a new method to represent and localize grasp affordances as bounded curved contact patches (paraboloids) of the size of the robotic hand. In particular, given a three-dimensional (3D) point cloud from a range sensor, a set of potential grasps is localized on a detected object by a fast contact patch fitting and validation process. For the object detection, three standard methods from the literature are used and compared. The potential grasps on the object are then refined to a single

APA, Harvard, Vancouver, ISO, and other styles

20

Linke, Tim, Klaus Wiese, Matthias Wangenheim, Burkhard Wies, and Jörg Wallaschek. "Investigation of Snow Milling Mechanics to Optimize Winter Tire Traction." Tire Science and Technology 45, no. 3 (2017): 162–74. http://dx.doi.org/10.2346/tire.17.450302.

Full text

Abstract:

ABSTRACT A detailed understanding of effects occurring in the contact patch between tire tread and snow surface is needed to maximize tire grip in winter conditions. The main focus of this study is quantifying the snow milling effects of individual tire tread block elements during sliding. Tests are carried out using the high-speed linear friction tester (HiLiTe), located at the Institute of Dynamics and Vibration Research at Leibniz University of Hannover, Germany. Test tracks are prepared using artificially produced snow. To solely investigate snow milling effects and exclude material proper

APA, Harvard, Vancouver, ISO, and other styles

21

Vytvytskyi, V. M., A. Ya Karvatskyi, I. O. Mikulionok, and O. L. Sokolskyi. "Research of the polymer granules shape and size influence on their tribological properties." Prospecting and Development of Oil and Gas Fields, no. 2(75) (June 30, 2020): 52–61. http://dx.doi.org/10.31471/1993-9973-2020-2(75)-52-61.

Full text

Abstract:

The use of a mathematical model of discrete motion of bulk material were justified for movement of polymer granules in the working channel of feeding zone of the screw extruder as a set of particles moving relative to each other based on the Discrete Element Method taking into account the influence of the shape and the size of polymer granules on their tribological properties on the example of the problem of forming the angle of repose. The study of the interaction among the granules of the following four polymers has been conducted: high-density polyeth-ylene of brand Marlex HHM 5502BN (HDPE)

APA, Harvard, Vancouver, ISO, and other styles

22

Mandal, Mrinmay, and Nilanjana Das Chatterjee. "Elephant’s habitat suitability assessment through geo spatial quantification in Panchet forest division, West Bengal." Ecofeminism and Climate Change 1, no. 3 (2020): 127–40. http://dx.doi.org/10.1108/efcc-05-2020-0012.

Full text

Abstract:

Purpose Ecologically habitat is an area of a particular species wherefrom its play every relationship with the surrounding. Therefore, every species hold habitat that supports to survive its life. The large terrestrial herbivore animal elephant (Elephas maximus) requires deferent kind of habitat for their biological behaviour. Forest habitat one of the landscapes entire their home range is very much responsible for selecting suitable habitat. The nature of habitat selection by an elephant is deeply concerned with landscape attributes. Design/methodology/approach The present study started in th

APA, Harvard, Vancouver, ISO, and other styles

23

Yi, Eunyoung, Isabelle Roux, and Elisabeth Glowatzki. "Dendritic HCN Channels Shape Excitatory Postsynaptic Potentials at the Inner Hair Cell Afferent Synapse in the Mammalian Cochlea." Journal of Neurophysiology 103, no. 5 (2010): 2532–43. http://dx.doi.org/10.1152/jn.00506.2009.

Full text

Abstract:

Synaptic transmission at the inner hair cell (IHC) afferent synapse, the first synapse in the auditory pathway, is specialized for rapid and reliable signaling. Here we investigated the properties of a hyperpolarization-activated current ( Ih), expressed in the afferent dendrite of auditory nerve fibers, and its role in shaping postsynaptic activity. We used whole cell patch-clamp recordings from afferent dendrites directly where they contact the IHC in excised postnatal rat cochlear turns. Excitatory postsynaptic potentials (EPSPs) of variable amplitude (1–35 mV) were found with 10–90% rise t

APA, Harvard, Vancouver, ISO, and other styles

24

Abdelaziz, Lebied, Necib Brahim, and Sahli Mohamed Lakhdar. "Modeling and simulation of a deformed smart structure using piezoelectric patch." World Journal of Engineering 14, no. 2 (2017): 165–72. http://dx.doi.org/10.1108/wje-08-2016-0053.

Full text

Abstract:

Purpose Safety improvement and cost reduction have a strong influence on the way to achieve maintenance operations of complex structures, in particular in air transportation, in civil engineering and others. In this case, piezoelectric ceramics such as sensors and actuators have been used. The advantages of piezoelectric materials include high achievable bandwidth, reliability, compactness, lightness and ease of implementation, thus making them well-suited to be used as actuators and sensors in the case of onboard structures. In this context, this study based around the examination of health a

APA, Harvard, Vancouver, ISO, and other styles

25

Dobre, George, Viorel Mateescu, Mihai Tica, and Radu Florin Mirica. "Study of Car Multi-Link Rear Axle Considering Their Kinematic Incompatibilities." Key Engineering Materials 450 (November 2010): 316–19. http://dx.doi.org/10.4028/www.scientific.net/kem.450.316.

Full text

Abstract:

Multi-link rear axles offer some important advantages relative to vehicle handling. But the structure of the multilink split type generally determines kinematic incompatibilities in its operation. The paper studies some aspects surrounding constructive solutions that could minimize these kinematic incompatibilities. Some rear axle mechanisms from different cars were measured and analyzed as component shape by authors; this process allows the geometrical modeling and animation of systems using specialized software (Autodesk Inventor Professional 8). The effects of these modeled structures (the

APA, Harvard, Vancouver, ISO, and other styles

26

Schmeitz, A. J. C., and A. P. Teerhuis. "Robustness and Applicability of a Model-Based Tire State Estimator for an Intelligent Tire." Tire Science and Technology 46, no. 2 (2018): 105–26. http://dx.doi.org/10.2346/tire.18.460204.

Full text

Abstract:

ABSTRACT Tire states can be estimated by measuring the tire contact patch shape as it varies with vertical load, longitudinal and lateral slip, and so on. In this study, a miniature triaxial accelerometer is used to measure the centripetal accelerations at the tire inner liner. A tire state estimator (TSE) algorithm is developed to transform the measured accelerations to actual tire states, in this case vertical load. The approach used for the TSE is the extended Kalman filter (EKF), but an additional peak detection algorithm is used to synchronize the simulation model with the measurement sig

APA, Harvard, Vancouver, ISO, and other styles

27

Katta, Samata, Alessandro Sanzeni, Alakananda Das, Massimo Vergassola, and Miriam B. Goodman. "Progressive recruitment of distal MEC-4 channels determines touch response strength in C. elegans." Journal of General Physiology 151, no. 10 (2019): 1213–30. http://dx.doi.org/10.1085/jgp.201912374.

Full text

Abstract:

Touch deforms, or strains, the skin beyond the immediate point of contact. The spatiotemporal nature of the touch-induced strain fields depend on the mechanical properties of the skin and the tissues below. Somatosensory neurons that sense touch branch out within the skin and rely on a set of mechano-electrical transduction channels distributed within their dendrites to detect mechanical stimuli. Here, we sought to understand how tissue mechanics shape touch-induced mechanical strain across the skin over time and how individual channels located in different regions of the strain field contribu

APA, Harvard, Vancouver, ISO, and other styles

28

Terryn, Joke, Marleen Welkenhuysen, Olga Krylychkina, et al. "Topographical Guidance of PSC-Derived Cortical Neurons." Journal of Nanomaterials 2018 (October 18, 2018): 1–10. http://dx.doi.org/10.1155/2018/5238901.

Full text

Abstract:

Background and Aims. Human pluripotent stem cell- (PSC-) derived neurons are increasingly used in the study of neurodevelopmental and neurodegenerative diseases. Electrophysiological activity is a crucial and defining function of these neurons. Patch clamping and the more recently developed multielectrode arrays are used to evaluate this complex function. In this study, we assess the effect of topography on PSC-derived neurons as a baseline for the development of next-generation silicon oxide substrates (in direct relation to MEA fabrication) that integrate topography as a means to guide netwo

APA, Harvard, Vancouver, ISO, and other styles

29

Kang, Sungchul, Yonk K. Hwang, Munsang Kim, Chongwon Lee, and Kyo-Il Lee. "A compliant controller dynamically updating the compliance center by contact localization." Robotica 16, no. 5 (1998): 543–50. http://dx.doi.org/10.1017/s0263574798000058.

Full text

Abstract:

This paper presents a compliant control method for insertion of complex objects with concavities. Most work on robot assembly using compliant motion control schemes focuses on overcoming jamming conditions for simple peg-in-hole problems, and cannot be used for complex shapes frequently encountered in assembly applications. When an object is being inserted to a hole or slot with a small clearance, a contact path is issued to compensate for uncertainties. When the object shape is complex, however, the contact state changes several times and severely, making compliant control difficult. The algo

APA, Harvard, Vancouver, ISO, and other styles

30

Tarigan, Theresia, and Ismet Danial Nasution. "Alveolar arch shapes and its relation to complete denture retention." Journal of Syiah Kuala Dentistry Society 5, no. 1 (2021): 30–36. http://dx.doi.org/10.24815/jds.v5i1.18426.

Full text

Abstract:

The alveolar ridge consists of denture bearing mucosa, sub-mucosa and periosteum, and residual alveolar bone. After tooth extraction, the remaining alveolar bone undergoes a remodeling process that leads to morphological reduction and alteration, which results in the change in alveolar ridge forms. However, it does not change alveolar arch shapes. This literature review aimed to analyze the relationship of alveolar arch shapes with complete denture retention. According to House (1958), alveolar arch shapes classified into three classes: Class I-square, Class II-tapering, Class III-ovoid. Those

APA, Harvard, Vancouver, ISO, and other styles

31

Kohler, Verena, and Sabrina Büttner. "Remodelling of Nucleus-Vacuole Junctions During Metabolic and Proteostatic Stress." Contact 4 (January 2021): 251525642110166. http://dx.doi.org/10.1177/25152564211016608.

Full text

Abstract:

Cellular adaptation to stress and metabolic cues requires a coordinated response of different intracellular compartments, separated by semipermeable membranes. One way to facilitate interorganellar communication is via membrane contact sites, physical bridges between opposing organellar membranes formed by an array of tethering machineries. These contact sites are highly dynamic and establish an interconnected organellar network able to quickly respond to external and internal stress by changing size, abundance and molecular architecture. Here, we discuss recent work on nucleus-vacuole junctio

APA, Harvard, Vancouver, ISO, and other styles

32

Grafinger, M. "USING KINEMATIC ANALYSIS TO DEVELOP A NEW TOOTH SYSTEM FOR GEARINGS WITH VARIABLE SHAFT ANGLE." Proceedings of the Design Society: DESIGN Conference 1 (May 2020): 2505–10. http://dx.doi.org/10.1017/dsd.2020.8.

Full text

Abstract:

AbstractThe belt units of an omnidirectional treadmill need to be connected for a continuous rotational transmission with variating axes angle. Torus gearing is not appropriate due to kinematic reasons, therefore a crown gearing with cone-shaped teeth is proposed. Parameter analysis on a virtual kinematics model show that depending on the cone angle, overlaps occur at different axis angles. Consequently, the shape of the teeth is modified with tip and foot relief and optimized so that no overlapping of the teeth occurs while a large path of contact is provided.

APA, Harvard, Vancouver, ISO, and other styles

33

Arimoto, Suguru, and Morio Yoshida. "A Mathematical and Numerically Integrable Modeling of 3D Object Grasping under Rolling Contacts between Smooth Surfaces." Modelling and Simulation in Engineering 2011 (2011): 1–8. http://dx.doi.org/10.1155/2011/684034.

Full text

Abstract:

A computable model of grasping and manipulation of a 3D rigid object with arbitrary smooth surfaces by multiple robot fingers with smooth fingertip surfaces is derived under rolling contact constraints between surfaces. Geometrical conditions of pure rolling contacts are described through the moving-frame coordinates at each rolling contact point under the postulates: (1) two surfaces share a common single contact point without any mutual penetration and a common tangent plane at the contact point and (2) each path length of running of the contact point on the robot fingertip surface and the o

APA, Harvard, Vancouver, ISO, and other styles

34

Zorko, Damijan, Jože Duhovnik, and Jože Tavčar. "Tooth bending strength of gears with a progressive curved path of contact." Journal of Computational Design and Engineering 8, no. 4 (2021): 1037–58. http://dx.doi.org/10.1093/jcde/qwab031.

Full text

Abstract:

Abstract The article presents a comprehensive study on the tooth bending strength of spur gears with a progressive curved path of contact, or so-called S-gears. Systematic gear meshing simulations were conducted to study the effects of S-gear geometry parameters on tooth bending strength. Different S-gear geometries were analysed in a systematically organized manner, and a comparison was made against a standard 20° pressure angle involute shape. Furthermore, different material combinations, e.g. polymer/polymer, steel/polymer, and steel/steel, of both drive and driven gear were analysed within

APA, Harvard, Vancouver, ISO, and other styles

35

Hannes, Dave, and B. Alfredsson. "Rolling Contact Fatigue Crack Growth Prediction by the Asperity Point Load Mechanism." Key Engineering Materials 488-489 (September 2011): 101–4. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.101.

Full text

Abstract:

The crack path and growth life of surface initiated rolling contact fatigue was investigated numerically based on the asperity point load mechanism. Data for the simulation was captured from a gear contact with surface initiated rolling contact fatigue. The evolvement of contact parameters was derived from an FE contact model where the gear contact had been transferred to an equivalent contact of a cylinder against a plane with an asperity. Crack propagation criteria were evaluated with practically identical crack path predictions. It was noted that the trajectory of largest principal stress i

APA, Harvard, Vancouver, ISO, and other styles

36

Chee, Sze Keat, Hirofumi Suzuki, Junchi Uehara, Takeshi Yano, Toshiro Higuchi, and Weimin Lin. "A Low Contact Force Polishing System for Micro Molds that Utilizes 2-Dimensional Low Frequency Vibrations (2DLFV) with Piezoelectric Actuators (PZT) and a Mechanical Transformer Mechanism." International Journal of Automation Technology 7, no. 1 (2013): 71–82. http://dx.doi.org/10.20965/ijat.2013.p0071.

Full text

Abstract:

This study proposes and develops a novel polishing system for micro molds which need high precision polishing, high aspect ratio of micro channel structure, or further miniaturization for micro channel structure. The proposed system has been named a “low contact force polishing system for micro mold utilizing 2-dimensional low frequency vibrations (2DLFV) with piezoelectric actuators (PZTs) and a mechanical transformer mechanism.” The system consists of 2DLFV with PZTs incorporated into the mechanical transformer structure, a low contact force loader, and a polishing tool. The shape of the pol

APA, Harvard, Vancouver, ISO, and other styles

37

Hingee, K. L. "STATISTICS FOR PATCH OBSERVATIONS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B6 (June 17, 2016): 235–42. http://dx.doi.org/10.5194/isprsarchives-xli-b6-235-2016.

Full text

Abstract:

In the application of remote sensing it is common to investigate processes that generate patches of material. This is especially true when using categorical land cover or land use maps. Here we view some existing tools, landscape pattern indices (LPI), as non-parametric estimators of random closed sets (RACS). This RACS framework enables LPIs to be studied rigorously. A RACS is any random process that generates a closed set, which encompasses any processes that result in binary (two-class) land cover maps. RACS theory, and methods in the underlying field of stochastic geometry, are particularl

APA, Harvard, Vancouver, ISO, and other styles

38

Hingee, K. L. "STATISTICS FOR PATCH OBSERVATIONS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B6 (June 17, 2016): 235–42. http://dx.doi.org/10.5194/isprs-archives-xli-b6-235-2016.

Full text

Abstract:

In the application of remote sensing it is common to investigate processes that generate patches of material. This is especially true when using categorical land cover or land use maps. Here we view some existing tools, landscape pattern indices (LPI), as non-parametric estimators of random closed sets (RACS). This RACS framework enables LPIs to be studied rigorously. A RACS is any random process that generates a closed set, which encompasses any processes that result in binary (two-class) land cover maps. RACS theory, and methods in the underlying field of stochastic geometry, are particularl

APA, Harvard, Vancouver, ISO, and other styles

39

DE BERG, MARK, and DIRK H. P. GERRITS. "COMPUTING PUSH PLANS FOR DISK-SHAPED ROBOTS." International Journal of Computational Geometry & Applications 23, no. 01 (2013): 29–48. http://dx.doi.org/10.1142/s0218195913500027.

Full text

Abstract:

Suppose we want to move a passive object along a given path, among obstacles in the plane, by pushing it with an active robot. We present two algorithms to compute a push plan for the case that the object and robot are disks and the obstacles are non-intersecting line segments. (When only the object's destination and not its full path is given these algorithms can still be used as subroutines in a larger algorithm to compute such a path.) The first algorithm assumes that the robot must maintain contact with the object at all times, and produces a shortest path. There are also situations, howev

APA, Harvard, Vancouver, ISO, and other styles

40

Ainsworth, I., M. Ristic, and D. Brujic. "CAD-Based Measurement Path Planning for Free-Form Shapes Using Contact Probes." International Journal of Advanced Manufacturing Technology 16, no. 1 (2000): 23–31. http://dx.doi.org/10.1007/pl00013128.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Sheng, Wei, Zhengminqing Li, Hong Zhang, and Rupeng Zhu. "Geometry and design of spur gear drive associated with low sliding ratio." Advances in Mechanical Engineering 13, no. 4 (2021): 168781402110125. http://dx.doi.org/10.1177/16878140211012547.

Full text

Abstract:

The relative sliding between tooth surfaces is the main cause of tooth wear and power loss, which directly affects the transmission efficiency and durability of gear. The aim of this paper is to provide a method to design such spur gear with low sliding ratio (LSR). Based on kinematics, differential geometry and contact path, the general mathematical models of the generating rack, the pinion and the mating gear tooth profiles are established in turn. Then, according to the relationship between the contact path and sliding ratio, a contact path described by a cubic function is proposed to const

APA, Harvard, Vancouver, ISO, and other styles

42

Selvadurai, A. P. S. "Rupture and Damage at Dilatant Geological Interfaces." Key Engineering Materials 827 (December 2019): 422–27. http://dx.doi.org/10.4028/www.scientific.net/kem.827.422.

Full text

Abstract:

The work discusses the processes that can be present at fractures and defects at geological interfaces. The introductory comment clearly indicates that the computational approaches offer the most appropriate methods for examining complex contact problems at geomaterial interfaces. There are, however, certain types of contact problems that are amenable to analytical treatment. The paper examines the problem of a circular dilatant-frictional patch located at an otherwise frictionless interface. The dilatancy processes are induced at the circular patch by the relative shear of the elastic regions

APA, Harvard, Vancouver, ISO, and other styles

43

Kumar, Gautam, and Kuntal Maji. "Formability of AA7075 Sheet in Single Point Incremental Forming." International Journal of Manufacturing, Materials, and Mechanical Engineering 11, no. 2 (2021): 40–54. http://dx.doi.org/10.4018/ijmmme.2021040103.

Full text

Abstract:

This article presents formability analysis of aluminium alloy 7075 thin sheets in single point incremental forming (SPIF) through prediction of forming limit curve (FLC) and maximum formable wall angle. Deformation instability method based on tool-sheet contact and non-contact zones in incremental forming was used for the prediction of limit strains for plane strain and equi-biaxial stretching strain path. FLC of the material was also determined experimentally, after measuring limit strains for deformed sheet through groove test for the process. Further, maximum forming wall angle of the mater

APA, Harvard, Vancouver, ISO, and other styles

44

Kohya, Masahide, Hiroyuki Narahara, and Hiroshi Suzuki. "Development of CAM System Based on Simulation of the Copy Operation - An Application to the Boundary Representation Method and High Efficiency Machining -." Journal of Robotics and Mechatronics 9, no. 6 (1997): 439–45. http://dx.doi.org/10.20965/jrm.1997.p0439.

Full text

Abstract:

A CAM system, based on a simulation of the servo data generation method of a copy milling machine, was developed. In this system, the tool path data can be calculated directly using the coordinates of the contact point between the defined shape and an imaginary stylus, without the preceding processes of generating an offset surface and checking the tool interference. For application of this algorithm to a model which is expressed using the boundary representation method, the algorithm was modified slightly. Since the contact point is regarded as the point nearest to the center of the imaginary

APA, Harvard, Vancouver, ISO, and other styles

45

Mori, Souma. "A Cognitive Analysis of the PrepositionOVER: Image-schema transformations and metaphorical extensions." Canadian Journal of Linguistics/Revue canadienne de linguistique 64, no. 3 (2019): 444–74. http://dx.doi.org/10.1017/cnj.2018.43.

Full text

Abstract:

AbstractDewell (1994), following Brugman (1981) and Lakoff (1987), provides a semantic analysis ofoverby relying more exclusively on image-schema transformations than did Brugman and Lakoff. The Brugman-Lakoff-Dewell analysis, however, can be improved by using simpler image-schemas, more natural image-schema transformations, and metaphorical extensions. A key idea adopted in the present article is to capture both trajectors and landmarks three-dimensionally and topologically. This modification brings about the elimination of unessential features such as the shape and size of the trajector and

APA, Harvard, Vancouver, ISO, and other styles

46

Wang, Fu Ji, Zhen Yuan Jia, Ming Xing Li, Jian Wei Ma, and Lei Ding. "Generation of Geometric Measurement Collision-Free Path for Curved Part." Applied Mechanics and Materials 421 (September 2013): 427–32. http://dx.doi.org/10.4028/www.scientific.net/amm.421.427.

Full text

Abstract:

Collision between the contact probe and the measuring part will occur easily when conducting geometric measurement of the curved parts with complex surface shape. To solve the security problem of geometric measurement, a generation method of collision-free measurement path was proposed. First, collision check was simplified into the calculation of line-surface intersection. Meanwhile, we used bounding box method and triangulation method as auxiliary tools. Then, when dealing with collision avoidance, we utilized bounding box in parametric directions to avoid collisions caused by neighboring su

APA, Harvard, Vancouver, ISO, and other styles

47

Semjon, Ján, Peter Demeč, and Jozef Svetlík. "Virtual Model of Tool Path for Milling Machine at Classical Design Base." Applied Mechanics and Materials 282 (January 2013): 235–41. http://dx.doi.org/10.4028/www.scientific.net/amm.282.235.

Full text

Abstract:

This article focuses on issue of proposal ideal tool paths for machine tools. Model of machine consists from 6 basic knots where milling machine disposes spindle placed in the horizontal direction are. Based on mathematical analysis we can detect the movement of machine axes for uncertainty investigated. The calculated values can be compared with machine model developed in Computer - Aided Design. Defining the shape of workpiece as well as assigning an appropriate instrument can be determined by true value of precision workpiece. After substituting the values of specific dimensions we get the

APA, Harvard, Vancouver, ISO, and other styles

48

Pang, Minghua, Lijie Ma, Fanjing Meng, Zhankui Wang, and Jianxiu Su. "Fluid wetting infiltration mechanism at the micro-contact zone boundary of rubber–glass interfaces." Industrial Lubrication and Tribology 72, no. 3 (2020): 279–84. http://dx.doi.org/10.1108/ilt-10-2019-0453.

Full text

Abstract:

Purpose This paper aims to clarify the fluid infiltration mechanism at the micro-contact zone boundary of rubber-glass interfaces. Design/methodology/approach An in situ observation instrument was putted up; then the fluid infiltration process was recorded. Experimental results indicated that the fluid infiltration was more likely to occur in a high-contact-area-ratio zone, and the path order of fluid infiltration was first inner normal to the boundary of micro-contact area, and then along the boundary, at last external normal to the direction of boundary. Findings By analysis, capillary press

APA, Harvard, Vancouver, ISO, and other styles

49

Gong, Xun, and Hsi-Yung Feng. "Cutter-workpiece engagement determination for general milling using triangle mesh modeling." Journal of Computational Design and Engineering 3, no. 2 (2015): 151–60. http://dx.doi.org/10.1016/j.jcde.2015.12.001.

Full text

Abstract:

Abstract Cutter-workpiece engagement (CWE) is the instantaneous contact geometry between the cutter and the in-process workpiece during machining. It plays an important role in machining process simulation and directly affects the calculation of the predicted cutting forces and torques. The difficulty and challenge of CWE determination come from the complexity due to the changing geometry of in-process workpiece and the curved tool path of cutter movement, especially for multi-axis milling. This paper presents a new method to determine the CWE for general milling processes. To fulfill the requ

APA, Harvard, Vancouver, ISO, and other styles

50

Vogelaar, Bouko, David Smeulders, and Jerry Harris. "Exact expression for the effective acoustics of patchy-saturated rocks." GEOPHYSICS 75, no. 4 (2010): N87—N96. http://dx.doi.org/10.1190/1.3463430.

Full text

Abstract:

Seismic effects of a partially gas-saturated subsurface have been known for many years. For example, patches of nonuniform saturation occur at the gas-oil and gas-water contacts in hydrocarbon reservoirs. Open-pore boundary conditions are applied to the quasi-static Biot equations of poroelasticity to derive an exact analytic expression of the effective bulk modulus for partially saturated media with spherical gas patches larger than the typical pore size. The pore fluid and the rock properties can have different values in the central sphere and in the surrounding region. An analytic solution

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!