Artykuły w czasopismach: „Wear Test Rig”

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Burgess, Stuart C., Torquil Pyper i Chung Seng Ling. "A linear actuated chain test rig capable of accelerated test speeds and continuous wear measurements". Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, nr 5 (22.06.2012): 1047–55. http://dx.doi.org/10.1177/0954406212451546.

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This article presents a novel linear actuated chain test rig, which is capable of accelerated test speeds and continuous wear measurements. The ability to measure chain wear in situ saves time and expense compared to a conventional sprocket driven rig because the traditional rig requires the chain to be dismantled in order to monitor wear. In situ chain measurement reduces errors significantly. The novel test rig does not have a traditional set up of rotary driven sprocket and chain but uses a pneumatic linear actuator to articulate a short section of chain, which is preloaded between two cantilevers. This design leads to a compact rig with only few moving parts and allows accelerated testing at high frequencies. Linear encoder displacement transducers are used to measure changes in chain length down to 0.06 µm at a rate of 4000 readings per second. Sample wear tests on different chains have been conducted to compare life test results with conventional sprocket-driven tests rig. A good correlation was obtained between the steady-state wear rate for three different brands of roller chain.

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Leonard, Benjamin D., Farshid Sadeghi, Sachin Shinde i Marc Mittelbach. "A novel modular fretting wear test rig". Wear 274-275 (styczeń 2012): 313–25. http://dx.doi.org/10.1016/j.wear.2011.09.015.

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Sevik, Yasar, i Ertugrul Durak. "Investigation of fretting wear in journal bearings". Industrial Lubrication and Tribology 68, nr 4 (13.06.2016): 466–75. http://dx.doi.org/10.1108/ilt-11-2015-0171.

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Purpose Fretting wear takes place when two contacting solid surfaces are subjected to relatively small amplitude oscillatory motion in the order of a few microns. The purpose of this paper is the design and manufacture of a fretting wear test rig that can analyze fretting wear on journal bearings. Design/methodology/approach This study included the manufacturing and operating principles of the test rig. In the test rig, the shaft was fixed and vibrational motion was given to the bearing housing. Vibration motion the amplitude of which could be adjusted was used on the test rig. The vibration motion was applied to a two-piece journal bearing on a fixed shaft supported from both ends. Findings Vibration amplitude was provided by a micro vibration engine (motor) to be under 100 μm. Originality/value Also, scanning electron microscopy, energy dispersive X-ray and X-ray diffraction analyses of the samples were investigated.

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Meuronen, Jaakko, Antti Mäntylä, Joona Vaara, Jouko Hintikka, Janne Juoksukangas, Arto Lehtovaara i Tero Frondelius. "Fretting test rig with variable normal force". Rakenteiden Mekaniikka 53, nr 4 (13.10.2020): 308–28. http://dx.doi.org/10.23998/rm.83573.

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Fretting is small amplitude reciprocating sliding between surfaces, and it may quickly causes surface cracks, which can continue growing under cyclic loads, until the structure breaks entirely as a result of the fretting fatigue. Fretting can also produce hardened wear particles as a result of adhesive wear, which then accelerates abrasive wear. In this case, the community uses the term fretting wear. The design of heavily loaded contacts, susceptible to fretting, is a difficult task because there is no generally accepted design guide. More extensive fretting research is needed to create them. This paper introduces detailed design phases for a equipment (rig) for a variable normal force fretting test. Supporting high radial and normal forces such that there is minimal run-out between the specimens was the most significant design challenge. The combination of a hydrostatic radial bearing and elastic torque shaft was selected for the detail design phase based on FE-analyses, calculations, and overall evaluation. The frame of the test rig consists of the main frame, which supports mainly the normal force and two torque frames, which support torque cylinders. Many solutions, which were found to be working in the current "ring-ring" apparatus of Tampere University, could be utilized in the new test rig like the tapered connections of the specimens, the elastic rod of the torque lever, axial displacement plate, and contact pressure adjustment system. The designed test rig enables fretting tests with 0 Hz to 20 Hz cycle frequency so that normal and tangential force or displacement can be controlled independently of each other. The normal force cannot change from compression to tension dynamically, but the adhesive force of the contact can be measured by slowly increasing the tension force. The designed fretting test rig fulfills all essential requirements, which were set.

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Furze, D. C., B. J. Griffiths i M. C. Carrey. "Wear Analysis Using a Quick Stop Device". Journal of Tribology 114, nr 3 (1.07.1992): 524–29. http://dx.doi.org/10.1115/1.2920914.

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This paper describes a new type of wear test rig which is based on a quick stop principle. The advantages of using such a rig and the associated testing method are described with respect to the analysis of prow formation.

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Dhokey, N. B., A. Raskar, A. R. Hake i G. Mohapatra. "Abrasive wear response of cryotreated EN45 steel in simulated wear test rig fixture". Tribology - Materials, Surfaces & Interfaces 9, nr 3 (3.07.2015): 159–64. http://dx.doi.org/10.1080/17515831.2015.1107240.

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Hammarsten, Åsa, i Sture Hogmark. "A high temperature test rig for sliding and rolling wear". Wear 115, nr 1-2 (marzec 1987): 139–50. http://dx.doi.org/10.1016/0043-1648(87)90205-5.

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Delaune, X., E. de Langre i C. Phalippou. "A Probabilistic Approach to the Dynamics of Wear Tests". Journal of Tribology 122, nr 4 (24.02.2000): 815–21. http://dx.doi.org/10.1115/1.1286257.

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Wear predictions of components belonging to pressurized water reactors require impact-sliding wear tests. Some scatter of the results have often been related to the complex dynamics of the test rig, which may be sensitive to small variations of parameters such as gaps or eccentricities. A probabilistic method is proposed here, which takes into account the actual dispersion of test parameters and the uncertainties on physical parameters for the computation of the test rig dynamics. The probability density function of wear work rate is used to assess the suitability of test parameters in terms of motion stability. An application of the method to some room temperature wear tests is presented. [S0742-4787(00)02403-6]

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Quintelier, Jan, Patrick de Baets, Joris Degrieck, Alessandro Ledda, W. Philips, Hugo Sol i Danny Van Hemelrijck. "On-Line Wear Monitoring of Polymer Matrix Composites". Materials Science Forum 475-479 (styczeń 2005): 1083–86. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1083.

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The Laboratory Soete developed a new test setup, based on the well-known pin-on-disc test rig. Instead of the standard composite specimen and steel disc, a rotating composite disc and a steel pin is presently used to have a visible wear track. Other measurement techniques (Acoustic Emission, vibrations, temperature) can be used on the test rig. Continuous monitoring of the wear track combined with standard wear and friction measurements, give results of the current state of the wear track. Fourier frequency analysis (FFT) of these signals gives an indication of the change in condition and contact geometry of the resulting pin-disc combination. A high-speed camera will be used to acquire digital images of the worn composite surface. These online measurements yield to the gradual evolution in damage of the composite specimens.

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Tamatam, Lakshminarayana Reddy, Daniele Botto i Stefano Zucca. "A novel test rig to study the effect of fretting wear on the forced response dynamics with a friction contact". Nonlinear Dynamics 105, nr 2 (lipiec 2021): 1405–26. http://dx.doi.org/10.1007/s11071-021-06658-y.

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AbstractThis paper presents a novel test rig to study the effect of fretting wear and of the contact surface evolution on the forced response of systems with dry friction contact. This rig allows simulating contacts similar to the type of contacts present between the shrouds at the blade tip. Several research groups have been studying how fretting wear affects the dynamic response of mechanical systems, developing numerical prediction tools that consider dry friction contact and nonlinearity. The aim of this work is to experimentally study the evolution of contact interfaces and how this evolution affects the system dynamics. Experimental results will aid to validate the numerical predictions. The test rig developed for this activity is made of a cantilever beam fixed at one end and with a friction contact at the free end. The contact couple is made of two replaceable specimens. The contact is loaded via a lifting mechanism through a screw with fine thread. Fretting wear test was performed at a constant frequency and force amplitude, exciting the beam with an electromagnetic shaker. To emphasize the change of the dynamic response, frequency sweeps were performed at various intervals during the wear test. The full range test with ‘changing preload’ due to progressing wear was performed until a full loss of contact. This paper describes the test rig design, intent, set-up, instrumentation, test plan and results. Results include the frequency response curves for unworn contact, wear profiles at multiple intervals and the effect of wear on the frequency response. Though energy dissipation per cycle is quite small, wear leads to material loss at the contact with a sufficiently large number of cumulative cycles and substantially affects the dynamic response. Results collected in this research activity are of particular importance to validate numerical tool that aim to simulate the dynamic behaviour of systems with dry friction contacts that undergo material loss caused by wear.

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Buckley-Johnstone, L., M. Harmon, R. Lewis, C. Hardwick i R. Stock. "A comparison of friction modifier performance using two laboratory test scales". Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 233, nr 2 (4.09.2018): 201–10. http://dx.doi.org/10.1177/0954409718787045.

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This paper describes two methods, carried out at two different test scales, for assessing the friction modifier performance. Study A used the wear data from a full-scale rig test at the voestalpine Schienen GmbH and compared it with the wear data from twin disc tests using the SUROS test machine at the University of Sheffield. Study B compared the ‘retentivity’ data, from a full-scale rig at the University of Sheffield, with the data from the SUROS tests. Study A concluded that a good correlation existed between the two scales although assumptions made in the full-scale contact calculation introduce a large spread into the results. There was a greater correlation between the two data sets at more severe contact conditions. Study B showed a different baseline coefficient of traction between the two scales and that a longer test length is required to fully evaluate the ‘retention’ of the friction modifier on the full-scale rig. The paper expands on a previous conference presentation on the same subject. Additional information on the test procedure and test rigs is included here. Surface and subsurface analyses of the SUROS test samples have also been added. The analyses have shown that applying the friction modifier leads to a similar wear mechanism as for the dry contact, but the wear is less severe and there is less subsurface deformation. A discussion describing the differences in test scales and comparing lab tests to field operation is also included.

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Hammarsten, Åsa, i Sture Hogmark. "Simulation of roller guide wear in a high temperature test rig". Wear 120, nr 1 (listopad 1987): 81–99. http://dx.doi.org/10.1016/0043-1648(87)90135-9.

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Chandel, Sunil, S. N. Singh i V. Seshadri. "Experimental Study of Erosion Wear in a Centrifugal Slurry Pump Using Coriolis Wear Test Rig". Particulate Science and Technology 30, nr 2 (marzec 2012): 179–95. http://dx.doi.org/10.1080/02726351.2010.523926.

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Bosso, Nicola, i Nicolò Zampieri. "Experimental and Numerical Simulation of Wheel-Rail Adhesion and Wear Using a Scaled Roller Rig and a Real-Time Contact Code". Shock and Vibration 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/385018.

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The work shows the use of a scaled roller rig to validate a real time wheel-rail contact code developed to study the wheel rail adhesion and the wear evolution. The code allows the profiles to change at each time step in order to take into account the material loss due to the wear process. The contact code replicates a testing machine composed of a roller rig with a prototype of a single suspended wheelset pressed onto it with a variable load. The roller rig, developed at Politecnico di Torino, is used to validate and optimize the contact code referring to experimental data directly measured in real time. The test bench, in fact, allows measurement of specific kinematical quantities and forces that are elaborated by the real-time code in order to produce numerical results for comparison with the experimental ones. This approach can be applied both to the determination of wheel-rail adhesion and to the wear process. The test rig is also equipped with a laser profilometer that allows measurement of the wheel and rail profiles with a very high accuracy.

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Kerremans, V., T. Rolly, P. De Baets, J. De Pauw, J. Sukumaran i Y. Perez Delgado. "Wear of conveyor chains with polymer rollers". International Journal Sustainable Construction & Design 2, nr 3 (6.11.2011): 378–87. http://dx.doi.org/10.21825/scad.v2i3.20537.

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Roller conveyor chains are common used to transport goods in production lines or assemblylines, such as pallets, cars or steel coils. They are sometimes used in severe environments, soiled withwater, foreign particles, chemicals or other contaminants. Normal use will result in wear of the componentsof the chain which can lead to unexpected failure and costly production downtime. Today, few literature onthe wear of conveyor chain is available and there are almost no reliable test-rigs to generate and measurechain wear in a reproducible manner. In this research the different components of conveyor chains and theloading conditions are described. Additionally, the applications and (dis)advantages of chains with polymerrollers are discussed. The chain wear mechanisms found in literature are listed. Abrasive and adhesivewear between pin, bushing, roller and track are discussed. From the contact mechanics of the chain andpressure-velocity limit of the roller materials, the design constraints for the laboratory test-rig were derived.The capabilities and working principles of the developed test-rig are explained in this paper.

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Shanbhag, Vignesh V., Thomas J. J. Meyer, Leo W. Caspers i Rune Schlanbusch. "Defining acoustic emission-based condition monitoring indicators for monitoring piston rod seal and bearing wear in hydraulic cylinders". International Journal of Advanced Manufacturing Technology 115, nr 9-10 (28.05.2021): 2729–46. http://dx.doi.org/10.1007/s00170-021-07340-8.

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AbstractFluid leakage from hydraulic cylinders is a major concern for the offshore industries as it directly affects hydraulic cylinder energy efficiency and causes environmental contamination. There have been attempts made in literature to develop robust condition monitoring techniques for hydraulic cylinders. However, most of these studies were performed to identify degradation of single components. Therefore, in this study, the aim is to monitor degradation of multiple components simultaneously in hydraulic cylinders using acoustic emissions. Experiments performed consist of three test phases and were performed using a hydraulic test rig. In the first test phase, the study is performed to identify acoustic emission features that can be used to monitor piston rod seal wear. In the second test phase, acoustic emission features are identified that can be used to understand bearing wear when unworn, semi-worn or worn piston rod seals are used in hydraulic test rig. In the third test phase, a run-to-failure test is conducted to identify acoustic emission features that can indicate fluid leakage initiation due to piston rod seal wear. The median frequency feature showed good repeatability in all the three test phases to identify piston rod seal wear, bearing wear and fluid leakage initiation during the initial stages in the hydraulic test rig. The proposed acoustic emission-based condition monitoring technique is robust and can be used for the hydraulic cylinders in the industries, as it identifies acoustic emission features based on particular frequency bands associated to specific components, making it less susceptible to noise from other components.

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Yingjie, Liu, i Alan V. Levy. "The influence of test parameters on material wastage in a fluidized bed wear test rig". Wear 151, nr 2 (grudzień 1991): 365–79. http://dx.doi.org/10.1016/0043-1648(91)90262-s.

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LEE, CHOON YEOL, JOONG HO KIM, JOON WOO BAE i YOUNG SUCK CHAI. "DEVELOPMENT OF THE HIGH TEMPERATURE FRETTING WEAR SIMULATOR FOR STEAM GENERATOR". International Journal of Modern Physics B 24, nr 15n16 (30.06.2010): 2603–8. http://dx.doi.org/10.1142/s0217979210065337.

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In nuclear power plant, fretting wear due to a combination of impact and sliding motions of the U-tubes against the supports and/or foreign objects caused by flow induced vibration, can make a serious problem in steam generator. A test rig, fretting wear simulator, is developed to elucidate fretting wear mechanism qualitatively and quantitatively. The realistic condition of steam generator of high temperature up to 320°C, high pressure up to 15 MPa, and water environment could be achieved by a test rig. The fretting wear simulator consists of main frame, water loop system, and control unit. Actual contact region under a realistic condition of steam generator was isolated using autoclave. Effects of various parameters such as the amounts of impact and sliding motions, applied loads and initial gaps and so forth are considered in this research. After the experiment, wear damage was measured by a three-dimensional profiler and the surface was also studied by SEM microscopically. Initial results were also presented.

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Durak, Ertugrul, i Hakan Ali Yurtseven. "Experimental study of the tribological properties of an elevator’s brake linings". Industrial Lubrication and Tribology 68, nr 6 (12.09.2016): 683–88. http://dx.doi.org/10.1108/ilt-11-2015-0186.

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Purpose This paper aims to design and manufacture a wear-test rig performing reciprocating movement that is more relevant to the elevator brake system. Also, a sample test result that was conducted in this experimental set-up is presented to evaluate the tribological properties of the brake linings of the elevator system that are activated in emergencies. Design/methodology/approach The brake linings are some of the most important security elements in elevators. The friction and wear properties of these brake linings have great importance for both safety and comfort. Elevator brake linings are often used in conjunction with guided rails under dry and boundary lubrication conditions. Therefore, friction coefficient and wear types occurring in the brake linings may be different. The tribological properties of the brake lining material in the literature are generally identified using a pin-on-disc wear-tester. The pin is contacted by rotating a disc in this wear-test rig. However, as the brake linings and guide rails do not have a reciprocating movement (linear translational motion) on each other, this wear-test rig is not suitable for brake linings and guide rails in the elevator system. Findings A sample test result that was conducted in this experimental set-up is presented to evaluate the tribological properties of the brake linings of the elevator system that are activated in emergencies. In these experiments, three different brake lining materials that are widely used in the elevator car guide rails in Turkey were tested under different speeds and loads. Originality/value The paper provides information about how to evaluate the tribological properties of the brake linings of the elevator system that are activated in emergencies. Also, it offers practical help for the manufacturer and researcher in the elevator sector.

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Vijayakumar, S., i L. Karunamoorthy. "Wear Characterization of Aluminium Metal Matrix Composites". Advanced Composites Letters 22, nr 4 (lipiec 2013): 096369351302200. http://dx.doi.org/10.1177/096369351302200401.

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Aluminium metal matrix composites wear characterization is presented in the paper. The LM25 grade aluminium alloy is chosen as matrix material and reinforcements are silicon carbide, zircon and garnet particles. AlMMCs are produced by conventional stir casting method and heat treated before making wear test specimens according to the ASTM G99 standards. The wear behaviour of these composites is studied under laboratory conditions using a pin-on-disc wear test rig. The wear behaviour of these composites is studied under sliding on EN32 steel disc. The influence of reinforcement type, volume fraction, particle size, sliding speed, applied load and sliding distance is analyzed.

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Monetti, C., S. Ilo i T. Lebersorger. "Characterization of lubricants for metal forming by means of an oscillating tribo-test-rig". Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 223, nr 5 (30.04.2009): 817–26. http://dx.doi.org/10.1243/13506501jet541.

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Cold metal forming is a versatile and very efficient technology in the manufacture of metal components. In cold metal forming processes high pressure is generated at the tool-workpiece interface, so that good lubrication is required to reduce wear. This improves tool life and the quality of products. The lubricants used in the forming processes usually contain appropriate basis oils with anti-wear (AW) and extreme pressure (EP) additives. In order to examine how wear occurs during cold metal forming, the SRV (Schwingung Reibung Verschleiss) reciprocating-sliding tribometer equipped with a cylinder-on-disc line- contact testing system was adapted and used to characterize lubricant behaviour. Friction coefficient and wear rate were determined under progressively increasing load conditions. The final worn volumes of the flat and the cylinder were evaluated by using optical microscopy methods. The measurement system was validated by replicate tests using some commercially available forming lubricants as reference in a load range of 100-1000 N. The oscillating tribo-test-rig can be used to characterize lubricants for cold metal forming processes by testing the combined effects of different additive systems and their interaction with contacting materials.

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KOWALEWSKI, Piotr, Anna BROŃCZYK i Wojciech WIELEBA. "A TRIBOLOGICAL TEST RIG FOR FIBRES, CABLES, AND PLAITINGS". Tribologia 271, nr 1 (28.02.2018): 51–55. http://dx.doi.org/10.5604/01.3001.0010.6363.

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The paper presents a description of the mechanical construction, measuring and control systems and the possibilities of a new type tribological testing device. The design was developed and built at the Department of Fundamentals of Machine Design and Tribology of Wroclaw University of Science and Technology. Described tester allows the investigate a friction and wear of components such as fibrous tapes, ropes, plaitings or fibers themselves in contact with solid materials. The paper describes in detail the construction of drive and the load pneumatic system. The innovative system of the device such measurement equipped with piezoelectric sensors and an experimental fixing unit of tested components also have been described. Work includes diagrams of used control and measurement systems and the central lubrication system. As a test the polyethylene cable in contact with brass rods has been examined. The results of this studies were been also presented in the paper.

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De Pauw, J., P. De Baets, Y. Perez Delgado, J. Sukumaran i W. Ost. "A full scale test rig for assessment of abrasive wear of shackle chains". Wear 302, nr 1-2 (kwiecień 2013): 1017–25. http://dx.doi.org/10.1016/j.wear.2012.12.044.

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Yousef, Samy, T. A. Osman, M. Khattab, Ahmed A. Bahr i Ahmed M. Youssef. "A New Design of the Universal Test Rig to Measure the Wear Characterizations of Polymer Acetal Gears (Spur, Helical, Bevel, and Worm)". Advances in Tribology 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/926918.

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This work aims to study the wear characterization of common types of acetal polymer gears (spur, helical, bevel, and worm) using a new TS universal test rig, in order to obtain reliable results and as a reference when compared with acetal nanocomposite gears later. The TS universal test rig consists of three different units that are connected by a main driver shaft and a pair of constantly meshing metal spur gears, which transfer power to the bevel and worm test units. The first unit is used to test the bevel gears, the second unit is used to test the spur and helical gears, and the third unit is used to test the worm gears. The loading mechanism is similarly designed to block the brake mechanism. Hobbing and milling machines were used to machine an injection-moulded polymer flanges and produce the tested gears. All gear pairs, except the worm gear, have identical gear ratios. The experiments were performed at speed 1420 rpm and the torque was 4 Nm. The results showed that the wear rates (in the form of weight loss) of spur gears were consistent with the previous results and the other gear types had larger wear rates.

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Bandel, P., i C. Di Bernardo. "A Laboratory Facility for the Study of Rubber Traction and Wear Resistance". Tire Science and Technology 18, nr 3 (1.07.1990): 201–13. http://dx.doi.org/10.2346/1.2141700.

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Abstract Phenomena occurring at the interface between the tread compound and the road surface are responsible for at least two main tire characteristics: traction capability and wear resistance. Both depend on the road surface geometry, the presence of thin films of water, local contact pressure, tread element stiffness, temperature, tangential slip, etc. To discount the effect of tire construction, a laboratory test using a small solid rubber wheel has been considered. A rig is designed to easily change the “road” surface, and convert it from wet to dry conditions, run the rubber wheel on such surfaces under high braking or driving torque, and measure torque against longitudinal slip. The rig features a flat disk on which different surfaces can be simulated and two separate electric motors driving the disk and the test wheel in order to control slip instead of torque and to avoid instability at high driving or braking torques. Results show longitudinal characteristics versus slip in different test conditions and simulation of severe abrasion conditions leading to typical abrasion patterns.

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Ramesh, R., i R. Gnanamoorthy. "Development of a fretting wear test rig and preliminary studies for understanding the fretting wear properties of steels". Materials & Design 27, nr 2 (styczeń 2006): 141–46. http://dx.doi.org/10.1016/j.matdes.2004.09.017.

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Tyfour, Wa’il R., Mohammed T. Hayajneh i Rania Hendawi. "Role of impact angle reversal on impact wear of mild steel". Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 232, nr 2 (20.04.2017): 97–105. http://dx.doi.org/10.1177/1350650117705978.

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Impact wear of mild steel has been studied in light of impact angle reversal. An in-house built, specially designed test rig has been used to facilitate test conditions, including impact angle reversal. Metallographic examination and scanning electron microscopy were used to analyze the morphology of impact surfaces. Results showed lower impact wear under condition involving impact angle reversal for the whole range of impact angles. Furthermore, multiple impact direction reversal showed significant impact wear reduction. Behavior has been explained in terms of failure due to plastic deformation accumulation.

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Liu, Juan, Luo Ping Pan i Jiang Cheng Yu. "Research on Cavitation and Silt Erosion Resistance of HVAF Coatings". Materials Science Forum 686 (czerwiec 2011): 618–22. http://dx.doi.org/10.4028/www.scientific.net/msf.686.618.

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Two kinds of harding coatings: WC-12Co and CrC-25NiCr were made by active combustion-high velocity air flue (AC-HVAF). By the rotating disc test rig, the systematical experiments were carried to study the wear resistance and mechanisms of coatings on different test conditions: pure water cavitation and sandy water silt erosion. On the sandy water silt erosion test condition, the wear resistance of HVAF coatings is better than that of metal matrix. However, it is reverse on the other test condition. Basing on the scanning electron microscope (SEM) analysis, the surface morphology of coating surface after wear was studied. And the influence of adhesion strength, micro-hardness and porosity ratio of HVAF coating on wear resistance was researched in detail.

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Ghani, Muhd Azimin Ab, A. F. Ahmad Kamal, Mohamad Ali Ahmad, Y. M. D. Taib, Z. Salleh i S. K. Alias. "Slurry Wear Test of Long Kenaf Polyester Composite (LKPC) and Long Kenaf Polyester with Fiberglass Composite". Applied Mechanics and Materials 393 (wrzesień 2013): 919–24. http://dx.doi.org/10.4028/www.scientific.net/amm.393.919.

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This paper presents an experimental study on the influence of fiberglass woven in Long Kenaf Polyester Composite (LKPC). Wear and friction characteristics were examined using sea water and sand as a slurry. Wear test were carried out using Slurry Erosion Test Rig (TR-40). These tests were performed at room temperature with speed of 200 rpm for every 2 km interval. The results from the tests show that mass loss were depends on the matrix composition of the composite. Surface Roughness, Ra, was consistently reduced after each test in all cases.

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Macián, Vicente, Bernardo Tormos, Guillermo Miró i Isaac Rodes. "Experimental assessment and validation of an oil ferrous wear debris sensors family for wind turbine gearboxes". Sensor Review 38, nr 1 (15.01.2018): 84–91. http://dx.doi.org/10.1108/sr-04-2017-0065.

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Purpose The purpose of this study was to perform a complete experimental assessment of a family of oil ferrous wear debris sensor is performed. The family comprised the original sensor and its re-engineered evolution, which is capable of detecting both amount and size of wear debris particles trapped by the sensor and some predefined oil condition properties. Design/methodology/approach In this work, the first step was to perform a design of experiments for the sensor validation. A specially defined test rig was implemented, and different ferrous wear debris was collected. For each sensor, two different tests were performed. The first test was called a “void test”, where quantified amounts of debris were collided with the sensor without oil. The second one was a dynamic test, where the sensor was installed in the test rig and different amounts of wear debris were added at a constant rate. In addition, specific tests related with oil properties detection were studied. Findings The results show excellent correlation of the sensor output signal with the amount of wear debris and a satisfactory detection of debris size in all ranges. Also, the dynamic test presented adequate representativeness, and sensors performed well in this scenario. Practical implications This paper shows the practical implementation of this type of sensor and the usual detection range and rate of detection for different debris size and quantities. Originality/value This work has a great utility for maintenance managers and equipment designers to fully understand the potential of this type of sensor and its suitability for the application required.

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31

Raes, Sebastien, Thibault Devreese, Jan De Pauw i Patrick De Baets. "Design of a tribological ball joint tester". International Journal Sustainable Construction & Design 6, nr 2 (7.07.2015): 5. http://dx.doi.org/10.21825/scad.v6i1.1137.

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The automotive industry uses ball joints in the suspension systems of cars. These ball joints are subject to various forces and relative displacements which inevitably invoke wear. The same happens in other applications that use ball joints, for example human hip joints. Nowadays there are only a few test rigs that can correctly simulate wear in these joints or test the joints according to a realistic loading cycle. This paper focuses on the design of a test rig that allows parametric research on these ball joints in order to increase the performance.

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32

Molina, Gustavo J., Fnu Aktaruzzaman, Valentin Soloiu, Mosfequr Rahman i Kenshantis Martin. "Development and Assessment of a New Flow-Through Test Instrument to Study Wear and Erosion Effects of Nanofluids". International Journal of Surface Engineering and Interdisciplinary Materials Science 5, nr 1 (styczeń 2017): 58–74. http://dx.doi.org/10.4018/ijseims.2017010104.

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Nanofluids, the suspensions of nano-size powders in ordinary fluids, are of technical interest for their enhanced cooling properties, but their possible erosion-corrosion effects on cooling-system materials are mostly unknown. This paper discusses the rationale for designing and developing a new test-rig with flow-through parallel to the tested surfaces. The instrument conduct-chamber accommodates multiple specimens for simultaneous testing, and controlled fluid speed and temperature. This study shows that the new rig yields measurable surface-modifications from nanofluid action in reasonable test-times. Results are presented for a nanofluid (of 2%-alumina-nanopowder in water) that is recirculated in parallel-flow contact with polished aluminum and copper. Surface modifications are assessed by roughness, weighing of removed-material, and optical-microscopy, and results indicate that nanopowders can lead to patterns of wear, erosion and corrosion that are substantially different than those typically obtained from the base-fluids.

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Moorthy, S. Srinivasa, K. Manonmani i T. Elangovan. "An Optimization Approach to the Dry Sliding Wear Behavior of Particulate Filled Glass Fiber Reinforced Hybrid Composites". Journal of Engineered Fibers and Fabrics 10, nr 2 (czerwiec 2015): 155892501501000. http://dx.doi.org/10.1177/155892501501000213.

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The new set of hybrid composites consisting of randomly oriented short e glass fiber reinforcement, polyester resin and titanium oxide (TiO2) particulate were developed by hand layup technique. Wear test was carried out by rubber wheel abrasive test (RWAT) rig with the four operating variables filler content, applied load, abrasive grit size (Al2O3) and test duration. The wear test of the composites were done on the basis of Taguchi's L9 (34) Orthogonal array. Analysis of variance and S/N ratio was used to study the optimum wear. From, Taguchi's experimental design a mathematical regression model of the wear rate was suggested. Genetic algorithm (GA) was used to compare the result which obtained from Taguchi's design of experiment. The fitness graph from the GA gives the better fitness function in which the operating variables were determined and the minimum wear rate was obtained. Scanning Electron Microscopy (SEM) image discovered to review the crater formation and fiber pull out.

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Shanmughasundaram, P., i R. Subramanian. "Wear Behaviour of Eutectic Al-Si Alloy-Graphite Composites Fabricated by Combined Modified Two-Stage Stir Casting and Squeeze Casting Methods". Advances in Materials Science and Engineering 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/216536.

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Dry sliding wear behaviour of eutectic Al-Si alloy-graphite composites was investigated employing a pin-on-disc wear test rig. Results revealed that the wear and friction coefficients decreased linearly with increasing weight percentage of graphite particles. Wear resistance of the composite increased considerably with increasing sliding velocity at constant load. In contrast, the friction coefficient of Al-7.5 wt.% Gr composite increased when the sliding velocity was increased from 1 m/s to 2 m/s at 49 N. Worn-out surfaces of wear specimens after the test were examined by scanning electron microscopy to study the morphology of worn surfaces. EDS analysis was carried out to investigate the influence of mechanically mixed layer (MML) which comprises oxides and iron, and this acted as an effective tribolayer in enhancing the wear resistance at higher sliding velocity.

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Wieczorek, Andrzej Norbert. "Experimental Studies on Abrasive Wear of Surface-Hardened and Shot Peened Alloy Cast Steels". Key Engineering Materials 674 (styczeń 2016): 201–6. http://dx.doi.org/10.4028/www.scientific.net/kem.674.201.

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The paper presents the results of wear tests of shot-peened and non-shot-peened cast steels with the use of an especially designed test rig simulating real operating conditions of chain wheels. The chain wheels subjected to tests were operated with the use of loose quartz abrasive. The studies involved the determination of strength and plastic properties, hardness distributions, microstructure and linear wear of the selected cast steels. Based on the results obtained, the following was found: the abrasive wear of cast steel chain wheels increased after shot peening.

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Huang, Haibo, Xing Chen, Binbin Fan i Yucun Jin. "Wear behavior for striated ridge intersected with obtuse angle on a newly developed test rig". Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 230, nr 3 (28.08.2015): 336–49. http://dx.doi.org/10.1177/1350650115602279.

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Buqian, Wang, Geng Gangqiang i Alan V. Levy. "Effect of microstructure on material wastage in a room-temperature fluidized-bed wear-test rig". Wear 165, nr 1 (maj 1993): 25–33. http://dx.doi.org/10.1016/0043-1648(93)90368-v.

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Quintelier, Jan, Pieter Samyn, Wim De Waele i Joris Degrieck. "Online Wear Monitoring of Polymer Matrix Composites". Materials Science Forum 561-565 (październik 2007): 635–38. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.635.

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Polymer matrix composites are widely used as bearing materials for heavy load applications. Still fundamental knowledge about the wear mechanisms of these materials and the evolution in time of these mechanisms is lacking. Currently these mechanisms are only analyzed by post mortem analysis. The Laboratory Soete, based on the well-known pin-on-disc test rig, has developed a new test-setup. Instead of the standard composite specimen and steel disc, a rotating composite disc and steel pin is used to be able to have a visible composite wear track. Standard wear and friction measurements will be further combined with vibration measurements. The vibration measurements give valuable information about the pin-disc contact. The combination of all these measurements should yield valuable information on the active wear mechanisms, the occurrence of fiber and matrix fracture, fiber pull out, generated frictional heat, formation mechanisms of wear particles, and the interaction between all these effects.

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39

Hemanth, R., Bheemappa Suresha i M. Sekar. "Dry Sliding Wear Performance of Thermoplastic Copolyester Elastomer Composites". Applied Mechanics and Materials 895 (listopad 2019): 38–44. http://dx.doi.org/10.4028/www.scientific.net/amm.895.38.

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This research work uncovers the wear performance of short glass fiber (SGF) fortified thermoplastic copolyester elastomer (TCE) hybrid composites loaded up with both micro (short carbon fibers, PTFE, SiC, Al2O3 and MoS2) and nano(Al2O3 and PFPE) sized particulate fillers. The readied hybrid composites are tested for tribological performance using pin-on-disc test rig. Test outcomes uncovered that TCE hybrid composite strengthened with SGF and loaded up with PTFE, SiC, Al2O3 and MoS2 displayed better wear resistance, however TCE hybrid composite loaded up with nanolubricating filler i.e. PFPE displayed slightest friction coefficient (μ) in the investigation. This study additionally archives the impact of tribological control factors such as sliding distance, sliding speed and filler content on tribological conduct of TCE composites in terms of specific wear rate (Ks) and μ.

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Xiao, Hai Bing, Xiao Peng Xie, Shou Qin Zhou i Heng Xing Xie. "Feature Extraction of Diesel Engine Wear Fault Based on Local Tangent Space Alignment". Applied Mechanics and Materials 482 (grudzień 2013): 179–82. http://dx.doi.org/10.4028/www.scientific.net/amm.482.179.

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In view of diesel engine wear fault feature extraction, feature extraction of diesel engine wear fault based on Local Tangent Space Alignment (LTSA) was put forward. This paper analyzes LTSA algorithm which reveals the characteristics of manifold learning. Take diesel engine fault diagnosis test rig as example, vibration information was got through imitating different kinds of diesel engine wear fault. LTSA algorithm was applied for dimensionality reduction. LTSA algorithm’s classification performance was compared in accordance with recognition rate of multi-class SVM. The experimental results show that LTSA has high recognition rate and is a very effective feature extraction method for diesel engine wear fault.

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Tyfour, Wa’il R., Mohammed T. Hayajneh i Jawad M. Qasaymeh. "On the models of erosive wear of ductile materials". Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 232, nr 11 (22.06.2016): 931–38. http://dx.doi.org/10.1177/1464420716656479.

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As the mechanism by which material is lost from ductile surfaces during solid particle erosion is still a matter of scientific debate, the work presented in this paper is aimed at trying to shed more light on the mechanism by which material is detached from ductile surfaces during solid particle erosion. Moreover, validating some of the most widely accepted models that predict erosive wear rate will form part of the paper. A specially designed test rig was used to facilitate test condition of an extensive experimental program. Results of the test program showed that plastic strain accumulation is largely responsible for material loss from ductile surfaces, even at cute impact angles. The key to this finding is the drop of erosive wear upon impact angle reversal indicates. It has been shown that none of the most widely accepted models of erosive wear could explain the result obtained under condition of impact angle reversal.

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Sun, Jian Wei, Li Qin Wang i Le Gu. "Modeling and Simulation of Wear in PTFE Lip Seals". Applied Mechanics and Materials 260-261 (grudzień 2012): 196–201. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.196.

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Radial lip seals made from PTFE composites are used more frequently for sealing of crank shafts in automotive and aerospace industries. Due to the seal loses materials and finally fails. Through experiment on a test rig, the tribology performance of seal can be predicted. Because of the non-linear elasto-viscoplastc material properties of PTFE composites, the finite element analysis (FEA) is adopted. A modified iterative remeshing method is adopted in wear process. The lip wears out according to the contact pressure of the node on the contact surface. Comparisons between numerical simulation and short-term service are made. The results show that the maximum of contact pressure decreased and width increased with wear time added, and the maximum of contact pressure moves toward the lip tip. Finally, it reaches lip tip, the phenomenon of uneven contact pressure was disappeared.

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Liu, Bin, Zu Hua Yang i Jian Song Zhou. "Tribological Behavior of Polyimide/Zinc Oxide Hybrid Films". Advanced Materials Research 105-106 (kwiecień 2010): 438–40. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.438.

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A series of polyimide/ZnO films were successfully prepared via a solution process. The friction and wear behavior of the hybrid polyimide films in dry sliding against Si3N4 ball was examined on a DF-PM ball-on-block unidirectional friction and wear test rig. The worn surface morphologies of the films were observed with a scanning electron microscope. It was found that the introduction of zinc oxide led to improving the tribological characteristics and thermal stability of the polyimide films. The polyimide/zinc oxide hybrid films had much better friction-reducing ability and wear-resistance than the neat PI film.

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Vits, F., D. Trauth, P. Mattfeld i F. Klocke. "Schleifscheibenverschleiß bei der PKD-Bearbeitung*/Grinding Wheel Wear in PCD-Grinding". wt Werkstattstechnik online 108, nr 06 (2018): 448–53. http://dx.doi.org/10.37544/1436-4980-2018-06-74.

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Der Artikel beschreibt eine systematische Untersuchung des Verschleißes einer keramisch gebundenen Diamantschleifscheibe beim Schleifen von polykristallinem Diamant vom Typ CMX 850 bei variablen Prozesseingangsgrößen. Ein neu entwickelter Versuchsaufbau ermöglicht die Betrachtung eines fortschreitenden Schleifscheibenverschleißes auf mikroskopischer Skala und eine Erklärung der zugrundeliegenden Schleifscheibenverschleißmechanismen.   This Paper contains a systematic analysis of the wear of a vitrified bonded diamond grinding wheel in grinding of polycrystalline diamond CMX 850 with different process input variables. A newly developed test rig enables the observation of a continuous grinding wheel wear on a microscopic scale and an explanation of the underlying grinding wheel wear mechanisms.

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Shivamurthy, B., Krishna Murthy i S. Anandhan. "Tribology and Mechanical Properties of Carbon Fabric/MWCNT/Epoxy Composites". Advances in Tribology 2018 (5.07.2018): 1–10. http://dx.doi.org/10.1155/2018/1508145.

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Cryogenic treated multilayered carbon fabric/oxidized multiwall carbon nanotube/epoxy (CCF/O-MWCNT/E) composite and untreated carbon fabric/epoxy (CF/E) composite were prepared by hot compression molding technique. The density and mechanical properties such as tensile properties, flexural properties, interlaminar shear strength, and microhardness of the composites were investigated as per ASTM standards. The wear and coefficient of friction behavior were investigated using computer interfaced pin-on-disc test rig at room temperature for varied load and sliding speed. The morphology of worn surfaces of the wear test composite specimens were studied by scanning electron microscope. It is found that the synergetic effect of addition of O-MWCNT to epoxy matrix and cryogenic treatment of carbon fabric improved the wear resistance and mechanical properties. Also, a thin lubricating film developed by the oxidized multiwall carbon nanotube/epoxy wear debris reduces the coefficient of sliding friction and wear rate.

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Lin, Yuan Ching, Hung Shiau Chen, Chun Ching Hsu, Yong Yuan Ku i Ke Wei Lin. "Tribological Performance Evaluation of Biodiesel Distilled Residue Blended with Fossil Diesel". Key Engineering Materials 739 (czerwiec 2017): 63–67. http://dx.doi.org/10.4028/www.scientific.net/kem.739.63.

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In this work, distilled residues from biodiesel of waste cooking acids methyl esters (WCME), was blended with fossil diesel in different ratios (D100/DR2/DR5/DR10/DR20) as testing fuels. The tribological performance of the blended oils was evaluated using a reciprocating cylinder-on-flat wear test rig (Cameron-Plint TE-77) at two temperatures (room temperature and 80°C). After the wear test, the wear depth of each tested specimen was determined using a profile meter and the worn surface was observed using a scanning electron microscope (SEM). Each worn surface was also examined using an energy dispersive spectrometer (EDS) to identify any surface film. The experimental results show that the tribological performance of the DR20 was superior to that of the other test oils. The lubricity of the test sample increased with the proportion of distilled residue, owing to the quantity of the methyl esters in the sample.

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Gupta, Gaurav, i Alok Satapathy. "Studies on Erosion Behavior of Plasma Sprayed Coatings of Glass Microspheres Premixed with Al2O3Particles". Advances in Tribology 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/763601.

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Solid particle erosion (SPE) tests are carried out to evaluate the performance of plasma sprayed coatings of borosilicate glass microspheres (BGM) premixed with Al2O3particles on metallic substrates. For this purpose, an Air Jet Erosion test rig confirming to ASTM G 76 test standards is used. Relative influence of different operating parameters on erosion rate is assessed by statistical analysis of the experimental findings that are based on Taguchi’s L16orthogonal array. This analysis helps to identify the most significant factor affecting the erosion wear rate of the coating. The study reveals that the impact velocity, impingement angle, erodent size, and Al2O3content in the feed stock, in the declining sequence, are the significant factors influencing the wear rate of these coatings. An Artificial Neural Network (ANN) approach is then implemented taking into account training and test procedure to predict the triboperformance of these coatings under wear conditions beyond the experimental range. Further, the microstructural features of the eroded samples are studied from SEM images to identify possible wear mechanisms.

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Rana, Ramakant, Qasim Murtaza i R. S. Walia. "GA based optimization of tri-bological behaviour of diamond coated tungsten carbide". World Journal of Engineering 17, nr 3 (7.05.2020): 335–46. http://dx.doi.org/10.1108/wje-08-2019-0220.

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Purpose In this study, the tri-bological behaviour of the un-coated and diamond coated tungsten carbide was evaluated using the pin-on-disc test rig. The same was also tested on a lathe machine tool. This paper aims to compare the tri-bological behaviour of coated tungsten carbide pin with un-coated tungsten carbide pin it also correlates the wear obtained from the two machines used. Design/methodology/approach Experiments were performed using L8 orthogonal array and results obtained on a pin-on-disc test rig under dry sliding process were optimized through a modern optimization technique i.e. genetic algorithm (GA). The response surface methodology model (L8 orthogonal array) formed the basis for the development of the GA model, which defines the conditions of minimum wear, minimum coefficient of friction and minimum surface roughness for the sliding process of the pin-on-disc test rig. Findings Implementation of the heuristic approach for optimization of input parameters for the combination of tool material used for the turning process. The initial approach involves tri-bological testing considering the same combination. The set of experiments further performed, inferred that the results were similar and that the diamond coating enhances the life of the tool. Originality/value Successfully synthesized the diamond coating on tungsten carbide tool material. Implantation of the heuristic approach, i.e. GA to tri-bological tests to identify the optimized level of input variables. Experimentation involves the tri-bological testing whose results were confirmed through performing experiments on the lathe machine tool.

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Genbrugge, Bart, Patrick De Baets i Wouter Ost. "Wear investigation of wet clutch friction material". International Journal Sustainable Construction & Design 1, nr 1 (6.11.2010): 46–49. http://dx.doi.org/10.21825/scad.v1i1.20394.

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Wear of friction plates for wet clutch applications can result in a decreasing transmittable torque and the occurrence of vibrations throughout the entire drive chain causing loss of performance and discomfort. The need for a simple wear model exists to predict the lifetime of the clutch and to give an insight in the combined influence of the operational parameters such as pressure and speed. In this paper wear of paper-based friction material is investigated on a simplified SAE#2 test-rig using only one friction plate and one spacer plate. During engagement torque, applied pressure and sliding velocity are continuously monitored. After a set number of engagement cycles the thickness change of the friction plate is measured and surface topography of the spacer plate is registered. Based on Archard’s wear law a specific wear rate is derived.

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Kishiwada, Satoshi, Yoshikatsu Shiwa, Kenta Yoshii, Noriyuki Satou, Keisuke ishii, Hisashi Hashimoto, Takeshi Fujii, Shinichi Takahashi, Hiroshi Oshige i Seisuke Takaki. "Prediction of Wear Loss of Exhaust Valve Seat of Gasoline Engine Based on Rig Test Result". SAE International Journal of Engines 11, nr 6 (3.04.2018): 1023–30. http://dx.doi.org/10.4271/2018-01-0984.

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