Many Tribology Group publications are Open Access thanks to funding from the EPSRC.

Search or filter publications

Filter by type:

Filter by publication type

Filter by year:

to

Results

  • Showing results for:
  • Reset all filters

Search results

  • Journal article
    Bae SC, Wong JSS, Kim M, Jiang S, Hong L, Granick Set al., 2008,

    Using light to study boundary lubrication: spectroscopic study of confined fluids

    , Philosophical Transactions of the Royal Society A. Mathematical, Physical and Engineering Sciences, Vol: 366
  • Journal article
    Reddyhoff T, Dwyer-Joyce RS, Zhang J, Drinkwater BWet al., 2008,

    Auto-calibration of ultrasonic lubricant-film thickness measurements

    , Measurement Science & Technology, Vol: 19, ISSN: 0957-0233

    The measurement of oil film thickness in a lubricated component is essential information for performance monitoring and design. It is well established that such measurements can be made ultrasonically if the lubricant film is modelled as a collection of small springs. The ultrasonic method requires that component faces are separated and a reference reflection recorded in order to obtain a reflection coefficient value from which film thickness is calculated. The novel and practically useful approach put forward in this paper and validated experimentally allows reflection coefficient measurement without the requirement for a reference. This involves simultaneously measuring the amplitude and phase of an ultrasonic pulse reflected from a layer. Provided that the acoustic properties of the substrate are known, the theoretical relationship between the two can be fitted to the data in order to yield reflection coefficient amplitude and phase for an infinitely thick layer. This is equivalent to measuring a reference signal directly, but importantly does not require the materials to be separated. The further valuable aspect of this approach, which is demonstrated experimentally, is its ability to be used as a self-calibrating routine, inherently compensating for temperature effects. This is due to the relationship between the amplitude and phase being unaffected by changes in temperature which cause unwanted changes to the incident pulse. Finally, error analysis is performed showing how the accuracy of the results can be optimized. A finding of particular significance is the strong dependence of the accuracy of the technique on the amplitude of reflection coefficient input data used. This places some limitations on the applicability of the technique.
  • Journal article
    Choo JW, Olver AV, Spikes HA, Dumont M-L, Ioannides Eet al., 2008,

    Interaction of asperities on opposing surfaces in thin film, mixed elastohydrodynamic lubrication

    , JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, Vol: 130, ISSN: 0742-4787
  • Journal article
    Miklozic KT, Forbus TR, Spikes HA, 2007,

    Performance of friction modifiers on ZDDP-Generated surfaces

    , TRIBOLOGY TRANSACTIONS, Vol: 50, Pages: 328-335, ISSN: 1040-2004
  • Journal article
    Qiu H, Paynter RJH, Dini D, Hills DAet al., 2008,

    The state of stress induced by ring dislocations in a semi-infinite stepped shaft

    , EUROPEAN JOURNAL OF MECHANICS A-SOLIDS, Vol: 27, Pages: 269-284, ISSN: 0997-7538
  • Journal article
    Qiu H, Hills DA, Nowell D, Dini Det al., 2008,

    Skew sliding of an elastic cylinder: An investigation of convection in contact

    , INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, Vol: 50, Pages: 293-298, ISSN: 0020-7403
  • Journal article
    Kadiric A, Sayles RS, Ioannides E, 2008,

    Thermo-mechanical model for moving layered rough surface contacts

    , Journal of Tribology-Transactions of the Asme, Vol: 130, ISSN: 1528-8897

    A numerical model designed to simulate a moving line contact of two rough layered bodies is presented. Fourier transforms are used to obtain fundamental solutions to relevant differential equations and then these solutions are used as kernel functions in a numerical scheme designed to provide a full thermomechanical solution for real layered contacts. The model assumes steady state heat transfer and predicts contact pressures and deformations, contact temperature rise, and resulting thermal stresses. The heat division between the contacting components is fully accounted for, as are the interactions between the mechanical and thermal displacements. Some results are presented to illustrate the potential importance of a full thermomechanical analysis as compared to a purely mechanical one as well as to demonstrate the influence of coating properties and surface roughness structure on the contact temperatures.
  • Journal article
    Spikes H, 2008,

    Low- and zero-sulphated ash, phosphorus and sulphur anti-wear additives for engine oils

    , LUBRICATION SCIENCE, Vol: 20, Pages: 103-136, ISSN: 0954-0075
  • Journal article
    Korsunsky AM, Dini D, Walsh MJ, 2008,

    Prediction of fatigue crack growth rates in Ti-6Al-4V alloy

    , Solid Mechanics and its Applications, Vol: 152, Pages: 47-64, ISSN: 0925-0042

    Crack initiation under thermo-mechanical fatigue is analyzed with consideration given to oxidation and creep strain accumulation. Transitions and interactions between different mechanisms, crack initiation and crack propagation rates display significant scaling and size effects. The objective of this work is to present experimental data for crack initiation and propagation in aerospace alloys, and to offersome means of describing these data so as to develop improved capabilities for life prediction in aerospace materials and assemblies. © Springer Science+Business Media B.V. 2008.
  • Journal article
    Topolovec-Miklozic K, Forbus TR, Spikes H, 2008,

    Film forming and friction properties of overbased calcium sulphonate detergents

    , TRIBOLOGY LETTERS, Vol: 29, Pages: 33-44, ISSN: 1023-8883
  • Book chapter
    Korsunsky AM, Dini D, Walsh MJ, 2008,

    Prediction of Fatigue Crack Growth Rates in Ti-6Al-4V Alloy

    , Multiscale Fatigue Crack Initiation and Propagation of Engineering Materials: Structural Integrity and Microstructural Worthiness, Editors: SIh, Netherlands, Publisher: Springer, Pages: 47-64, ISBN: 978-1-4020-8519-2
  • Conference paper
    Topolovec-Miklozic K, Forbus TR, Lockwood F, Spikes Het al., 2008,

    Behaviour of boundary lubricating additives on DLC coatings

    , ASME/STLE International Joint Tribology Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 141-143
  • Conference paper
    Hartinger M, Gosman D, Ioannides S, Spikes Het al., 2008,

    Thermal effects in an elastohydrodynamic line contact using a CFD approach

    , ASME/STLE International Joint Tribology Conference, Publisher: AMER SOC MECHANICAL ENGINEERS, Pages: 179-180
  • Conference paper
    Song X, Zhang SY, Dini D, Korsunsky AMet al., 2008,

    Inter-granular residual stresses in polycrystalline aggregates: finite element modelling and diffraction post-processing

    , MECASENS 4th International Conference on Stress Evaluation using Neutrons and Synchrotron Radiation, Publisher: TRANS TECH PUBLICATIONS LTD, Pages: 271-+, ISSN: 0255-5476
  • Journal article
    Reddyhoff T, Dwyer-Joyce RS, Zhang J, Drinkwater BWet al., 2008,

    Auto-calibration of ultrasonic lubricant-film thickness measurements

    , Measurement Science and Technology, Vol: 19, ISSN: 0957-0233

    The measurement of oil film thickness in a lubricated component is essential information for performance monitoring and design. It is well established that such measurements can be made ultrasonically if the lubricant film is modelled as a collection of small springs. The ultrasonic method requires that component faces are separated and a reference reflection recorded in order to obtain a reflection coefficient value from which film thickness is calculated. The novel and practically useful approach put forward in this paper and validated experimentally allows reflection coefficient measurement without the requirement for a reference. This involves simultaneously measuring the amplitude and phase of an ultrasonic pulse reflected from a layer. Provided that the acoustic properties of the substrate are known, the theoretical relationship between the two can be fitted to the data in order to yield reflection coefficient amplitude and phase for an infinitely thick layer. This is equivalent to measuring a reference signal directly, but importantly does not require the materials to be separated. The further valuable aspect of this approach, which is demonstrated experimentally, is its ability to be used as a self-calibrating routine, inherently compensating for temperature effects. This is due to the relationship between the amplitude and phase being unaffected by changes in temperature which cause unwanted changes to the incident pulse. Finally, error analysis is performed showing how the accuracy of the results can be optimized. A finding of particular significance is the strong dependence of the accuracy of the technique on the amplitude of reflection coefficient input data used. This places some limitations on the applicability of the technique. 2008 IOP Publishing Ltd.
  • Journal article
    Reddyhoff T, Dwyer-Joyce RS, Harper P, 2008,

    A new approach for the measurement of film thickness in liquid face seals

    , Tribology Transactions, Vol: 51, Pages: 140-149, ISSN: 1040-2004

    Face seals operate by allowing a small volume of the sealed fluid to escape and form a thin film between the contacting parts. The thickness of this film must be optimized to ensure that the faces are separated, yet the leakage is minimized. In this work the liquid film is measured using a novel ultrasonic approach with a view to developing a condition monitoring tool. The trials were performed in two stages. Initially tests were based on a lab simulation, where it was possible to compare the ultrasonic film thickness measurements with optical interference methods and capacitance methods. A direct correlation was seen between ultrasonic measurements and capacitance. Where ultrasonic and optical methods overlap, good correlation is observed; however, the optical method will not record film thickness above 0.72 m. A second set of trials was carried out, where the film thickness was monitored inside a seal test apparatus. Film thickness was successfully recorded as speed and load were varied. The results showed that while stationary the film thickness varied noticeably with load. When rotating, however, the oil film remained relatively stable around 2 m. During the normal operation of the seal, both sudden speed and load changes were applied in order to initiate a seal failure. During these events, the measured film thickness was seen to drop dramatically down to 0.2 m. This demonstrated the ability of the technique to predict failure in a face seal and therefore its aptitude for condition monitoring.
  • Conference paper
    Korsunsky AM, Dini D, Walsh MJ, 2008,

    Fatigue crack growth rate analysis in a titanium alloy

    , 7th International Conference on Fracture and Damage Mechanics, Publisher: TRANS TECH PUBLICATIONS LTD, Pages: 5-+, ISSN: 1013-9826
  • Journal article
    Wong JSS, Granick S, 2007,

    Open questions about polymer friction

    , Journal of Polymer Science. Part B, Polymer Physics, Vol: 45
  • Journal article
    Olver AV, Dini D, Lainé E, Beveridge TA, Hua DYet al., 2007,

    Roughness and lubricant chemistry effects in micropitting

    , American Gear Manufacturers Association - Fall Technical Meeting of the American Gear Manufacturers Association 2007, AGMA, Pages: 151-160

    Micropitting has been studied using a disc machine in which a central carburised steel test roller contacts three, harder, counter-rollers ("rings") with closely controlled roughness. We varied the roughness using different finishing techniques and investigated the effects of different oil base-stocks and additives, whilst keeping the viscosity approximately constant. We also developed a predictive model for the approximate analysis of rough-surface elastohydrodynamic lubrication based on the FFT approach of Hooke. Damage on the test rollers included dense micropitting and "micropitting erosion" in which tens of microns of the test surface were completely removed. This phenomenon is particularly damaging in gear teeth where it has the potential to destroy profile accuracy. It was found that anti-wear additives led to a high rate of micropitting erosion and that the effect correlated more or less inversely with simple sliding wear results. There were also appreciable effects from base-stock chemistry. The key parameter affecting the severity of damage seemed to be the near-surface shear stress amplitude arising from the evolved roughness; different chemistries led to the evolution of different roughness during initial running and thence to different contact stresses and different levels of damage. © AGMA 2007 - All rights reserved.
  • Journal article
    Zhang SY, Song X, Dini D, Korsunsky AMet al., 2007,

    Formulation and calibration of a crystal plasticity finite element model for HCP polycrystals

    , Computational Plasticity - Fundamentals and Applications, COMPLAS IX, Pages: 639-642
  • Journal article
    Song X, Zhang SY, Dini D, Korsunsky AMet al., 2007,

    Microscopic energy dissipation and fatigue crack initiation in polycrystalline metallic alloys

    , Computational Plasticity - Fundamentals and Applications, COMPLAS IX, Pages: 709-712

    In this paper we propose an energy-based criterion for life-prediction of fatigue crack initiation via a 3D, elastically anisotropic FE model for cyclic deformation and hardening of face-centred cubic (FCC) materials. © CIMNE, 2007.
  • Journal article
    Fan J, Mueller M, Stoehr T, Spikes HAet al., 2007,

    Reduction of friction by functionalised viscosity index improvers

    , TRIBOLOGY LETTERS, Vol: 28, Pages: 287-298, ISSN: 1023-8883
  • Journal article
    Müller M, Fan J, Spikes H, 2007,

    Design of functionalized PAMA viscosity modifiers to reduce friction and wear in lubricating oils

    , Journal of ASTM International, Vol: 4, Pages: 116-125, ISSN: 0066-0558

    Polyalkylmethacrylates (PAMAs) are widely used as both viscosity index improvers and dispersant boosters in engine, hydraulic, and transmission oils. Since they are employed in a relatively high concentration in these roles, it is desirable that they be able to enhance other characteristics of a lubricant and, in particular, its boundary lubricating properties. A series of functionalized PAMAs have been synthesized that can adsorb from oil solution onto rubbing surfaces to produce thick boundary films. These films enhance lubricant film formation in slow speed and high temperature conditions and thus make a significant contribution to their lubricating ability. The current paper describes a systematic study of the influence of functionallzed PAMAs on boundary lubrication performance. The high frequency reciprocating test rig (HFRR) was applied to investigate friction and wear under pure sliding. A new test method has been developed which allows wear to be monitored in a rolling and sliding contact based on the mini traction machine (MTM). This, in combination with other tests, is employed to investigate the influence of polymer architecture, functionality, concentration and molecular weight on friction and wear in a range of lubricant formulations. This enables the tailored design of polymers which offer low friction and wear properties. Copyright © 2007 by ASTM International.
  • Journal article
    Olver AV, Dini D, 2007,

    Roughness in lubricated rolling contact: the dry contact limit

    , P I MECH ENG J-J ENG, Vol: 221, Pages: 787-791, ISSN: 1350-6501

    A difficulty with the standard fast Fourier transform (FFT) perturbation model of roughness in lubricated rolling contacts is that it does not necessarily converge towards the elastic case as the film thickness is reduced; rather it leads to a situation in which all the roughness is completely flattened. This is rarely the case for real engineering surfaces.Here, it is shown that this difficulty can be avoided by carrying out a Fourier transform of the elastostatically flattened roughness and using the resulting (complex) amplitude as the low-film thickness limit of each Fourier component in the elastohydrodynamic lubrication (EHL) analysis.Results give a plausible convergence to the elastostatic solution, which is nevertheless consistent with the expected near-full-film EHL behaviour and which becomes identical to the earlier model for roughness that, statically, can be fully flattened. As expected, hydrodynamic action persists at the finest scale, even for very thin films.
  • Conference paper
    Müller M, Bartels T, Hedrich K, Wincierz C, Spikes Het al., 2007,

    Tailor-made polyalkylmethacrylate additives to meet the stringent requirements of current and future generations of engine, transmission, gear and hydraulic oils

    A discussion covers an introduction into polyalkylmethacrylates (PAMA) and their chemistry; viscometric and tribological effects of PAMA in lubricant formulations; recent findings from a scientific study of EHD film formation, friction and wear reduction through specifically designed PAMA; results of various performance and application tests demonstrating the effect of PAMA on different performance aspects of modern lubricants; wear reduction and fuel economy engine oils, including pitting performance, operating temperature control, and energy efficiency in transmission and gear oils; and the effect of PAMA on hydraulic pump efficiency and delivered hydraulic work in different performance and field tests. This is an abstract of a paper presented at the 13th Annual Fuels and Lubes Asia Conference (Bangkok, Thailand 3/7-9/2007).
  • Journal article
    Chapkov AD, Bair S, Cann P, Lubrecht AAet al., 2007,

    Film thickness in point contacts under generalized Newtonian EHL conditions: Numerical and experimental analysis

    , TRIBOLOGY INTERNATIONAL, Vol: 40, Pages: 1474-1478, ISSN: 0301-679X
  • Journal article
    Olver AV, Wilson D, Crofton PSJ, 2007,

    Investigation of service failures of steel music wire

    , Engineering Failure Analysis, Vol: 14, Pages: 1224-1232, ISSN: 1350-6307
  • Journal article
    Cann PME, Stack MM, 2007,

    A celebration of 25 years of the Tribology Group: from tribo-physics to tribo-chemistry

    , JOURNAL OF PHYSICS D-APPLIED PHYSICS, Vol: 40, ISSN: 0022-3727
  • Journal article
    Cann PME, Lubrecht AA, 2007,

    Bearing performance limits with grease lubrication: the interaction of bearing design, operating conditions and grease properties

    , JOURNAL OF PHYSICS D-APPLIED PHYSICS, Vol: 40, Pages: 5446-5451, ISSN: 0022-3727
  • Conference paper
    Korsunsky AM, Dini D, Dunne FPE, Walsh MJet al., 2007,

    Comparative assessment of dissipated energy and other fatigue criteria

    , 6th International Conference on Fatique Damage of Structural Materials, Publisher: ELSEVIER SCI LTD, Pages: 1990-1995, ISSN: 0142-1123
  • Journal article
    Nikas GK, Burridge G, Sayles RS, 2007,

    Modelling and optimization of rotary vane seals

    , PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, Vol: 221, Pages: 699-715, ISSN: 1350-6501
  • Journal article
    Choo J-H, Forrest AK, Spikes HA, 2007,

    Influence of organic friction modifier on liquid slip: A new mechanism of organic friction modifier action

    , TRIBOLOGY LETTERS, Vol: 27, Pages: 239-244, ISSN: 1023-8883
  • Journal article
    Cann PM, 2007,

    Grease lubrication of rolling element bearings - Role of the grease thickener

    , Lubrication Science, Vol: 19, Pages: 183-196, ISSN: 0954-0075

    The contribution of grease thickener to lubricant film formation was examined in this paper. Lubricant film thickness and friction were measured for different grease thickener types in a bearing simulation device. The results showed that the greases formed thick (20-80 nm), low friction surface layers at low speeds, which were much greater than the corresponding base oil film. These films appeared to be formed by the physical deposition of thickener in the track during overrolling of the grease. This was confirmed by infrared reflection analysis, which showed the deposited films to have increased thickener content. The ability of grease to form renewable physically deposited solid films has significant implications for optimising lubricant formulation for certain applications, e.g. bearings operating at high temperatures and low speeds where a conventional elastohydrodynamic lubricating film would be inadequate. Copyright © 2007 John Wiley & Sons, Ltd.
  • Journal article
    Fan J, Spikes H, 2007,

    New test for mild lubricated wear in rolling-sliding contacts

    , TRIBOLOGY & LUBRICATION TECHNOLOGY, Vol: 63, Pages: 36-45, ISSN: 1545-858X
  • Journal article
    Qiu H, Hills DA, Dini D, 2007,

    The influence function for self-equilibrating forces on a semi-infinite wedge

    , JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, Vol: 42, Pages: 351-359, ISSN: 0309-3247
  • Journal article
    Choo JH, Glovnea RP, Forrest AK, Spikes HAet al., 2007,

    A low friction bearing based on liquid slip at the wall

    , JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, Vol: 129, Pages: 611-620, ISSN: 0742-4787
  • Conference paper
    Dini D, Hills DA, 2007,

    Frictional Energy Dissipation In A Rough Hertzian Contact (MCMAT2007-30565)

    , ASME Applied Mechanics and Materials Conference
  • Journal article
    Karuppanan S, Dini D, Hills DA, 2007,

    Fretting fatigue test analysis of contact

    , FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, Vol: 30, Pages: 499-509, ISSN: 8756-758X
  • Journal article
    Sackfield A, Dini D, Hills DA, 2007,

    Contact of a rotating wheel with a flat

    , INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, Vol: 44, Pages: 3304-3316, ISSN: 0020-7683
  • Journal article
    Topolovec-Miklozic K, Forbus TR, Spikes HA, 2007,

    Film thickness and roughness of ZDDP antiwear films

    , TRIBOLOGY LETTERS, Vol: 26, Pages: 161-171, ISSN: 1023-8883
  • Journal article
    Fan J, Spikes H, 2007,

    New test for mild lubricated wear in rolling-sliding contacts

    , TRIBOLOGY TRANSACTIONS, Vol: 50, Pages: 145-153, ISSN: 1040-2004
  • Journal article
    Cann PM, Webster MN, Doner JP, Wikstrom V, Lugt Pet al., 2007,

    Grease degradation in R0F bearing tests

    , TRIBOLOGY TRANSACTIONS, Vol: 50, Pages: 187-197, ISSN: 1040-2004
  • Journal article
    Fowell M, Olver AV, Gosman AD, Spikes HA, Pegg Iet al., 2007,

    Entrainment and inlet suction: Two mechanisms of hydrodynamic lubrication in textured bearings

    , JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, Vol: 129, Pages: 336-347, ISSN: 0742-4787
  • Journal article
    Duo P, Liu J, Dini D, Golshan M, Korsunsky AMet al., 2007,

    Evaluation and analysis of residual stresses due to foreign object damage

    , MECHANICS OF MATERIALS, Vol: 39, Pages: 199-211, ISSN: 0167-6636
  • Journal article
    Choo JH, Spikes HA, Ratoi M, Glovnea R, Forrest Aet al., 2007,

    Friction reduction in low-load hydrodynamic lubrication with a hydrophobic surface

    , TRIBOLOGY INTERNATIONAL, Vol: 40, Pages: 154-159, ISSN: 0301-679X
  • Journal article
    Xu X, Spikes H, 2007,

    Study of zinc dialkyldithiophosphate in di-ethylhexyl sebacate using electrochemical techniques

    , TRIBOLOGY LETTERS, Vol: 25, Pages: 141-148, ISSN: 1023-8883
  • Journal article
    Masen MA, De Rooij MB, Schipper DJ, Adachi K, Kato Ket al., 2007,

    Single asperity abrasion of coated nodular cast iron

    , TRIBOLOGY INTERNATIONAL, Vol: 40, Pages: 170-179, ISSN: 0301-679X
  • Journal article
    Choo JW, Olver AV, Spikes HA, 2007,

    The influence of transverse roughness in thin film, mixed elastohydrodynamic lubrication

    , TRIBOLOGY INTERNATIONAL, Vol: 40, Pages: 220-232, ISSN: 0301-679X
  • Journal article
    Müller M, Fan J, Spikes H, 2007,

    Influence of polymethacrylate viscosity index improvers on friction and wear of lubricant formulations

    , SAE Technical Papers, ISSN: 0148-7191

    Polyalkylmethacrylates (PAMAs) are widely used as viscosity index improvers and dispersant boosters in engine, transmission and hydraulic oils. They have been shown to be able to adsorb from oil solution on to metal surfaces, to produce thick, viscous boundary films. These films enhance lubricant film formation in slow speed and high temperature conditions and thus produce a significant reduction of friction and wear. In a recent systematic study a range of dispersant and non-dispersant PAMAs has been synthesized. The influence of different functionalities, molecular weights and architectures on both boundary film formation and friction has been explored using optical interferometry and friction-speed charting. From the results, guidelines have been developed for designing PAMAs having optimal boundary lubricating properties. In the current paper the film forming, friction and wear properties of solutions of two functionalised PAMAs is first described. Then the impact of different lubricant additives on these friction and wear properties is explored. A number of components from all major classes of additives commonly used in commercial DI packages have been investigated. The results help the performance of PAMAs in fully formulated oils to be predicted and thus their design to be optimized.
  • Journal article
    Vorster WJJ, Zhang SY, Golshan M, Laundy D, Dini D, Korsunsky AMet al., 2007,

    Comparison of X-ray diffraction measurement of residual elastic strains: monochromatic beam and image plate versus white beam energy-dispersive analysis

    , JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, Vol: 42, Pages: 23-37, ISSN: 0309-3247

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://www.imperial.ac.uk:80/respub/WEB-INF/jsp/search-t4-html.jsp Request URI: /respub/WEB-INF/jsp/search-t4-html.jsp Query String: id=391&limit=50&page=15&respub-action=search.html Current Millis: 1732263992282 Current Time: Fri Nov 22 08:26:32 GMT 2024

Organisations

Tribology Journals

Tribology Links