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Готові списки джерел за темами / Friction-induced structures / Статті в журналах

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Статті в журналах з теми "Friction-induced structures"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 19 липня 2025

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1

Stelter, Peter. "Nonlinear vibrations of structures induced by dry friction." Nonlinear Dynamics 3, no. 5 (1992): 329–45. http://dx.doi.org/10.1007/bf00045070.

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2

Tovstopyat-Nelip, I., and H. G. E. Hentschel. "Friction and noise-induced coherent structures in boundary lubrication." Physical Review E 61, no. 4 (2000): 3318–24. http://dx.doi.org/10.1103/physreve.61.3318.

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3

Eichstädt, J., G. R. B. E. Römer, and A. J. Huis in’t Veld. "Towards Friction Control using laser-induced periodic Surface Structures." Physics Procedia 12 (2011): 7–15. http://dx.doi.org/10.1016/j.phpro.2011.03.099.

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4

Rung, Stefan, Kevin Bokan, Frederick Kleinwort, et al. "Possibilities of Dry and Lubricated Friction Modification Enabled by Different Ultrashort Laser-Based Surface Structuring Methods." Lubricants 7, no. 5 (2019): 43. http://dx.doi.org/10.3390/lubricants7050043.

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In this contribution we report on the possibilities of dry and lubricated friction modification introduced by different laser surface texturing methods. We compare the potential of Laser-Induced Periodic Surface Structures and Laser Beam Interference Ablation on 100Cr6 steel in a linear reciprocating ball-on-disc configuration using 100Cr6 steel and tungsten carbide balls with load forces between 50 mN and 1000 mN. For dry friction, we find a possibility to reduce the coefficient of friction and we observe a pronounced direction dependency for surfaces fabricated by Laser Beam Interference Abl

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5

van der Poel, Sanne, Marek Mezera, Gert-willem Römer, Erik de Vries, and Dave Matthews. "Fabricating Laser-Induced Periodic Surface Structures on Medical Grade Cobalt–Chrome–Molybdenum: Tribological, Wetting and Leaching Properties." Lubricants 7, no. 8 (2019): 70. http://dx.doi.org/10.3390/lubricants7080070.

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Hip-implants structured with anti-bacterial textures should show a low-friction coefficient and should not leach hazardous substances into the human body. The surface of a typical material used for hip-implants, namely Cobalt–Chrome–Molybdenum (CoCrMo) was textured with different types of laser-induced periodic surface structures (LIPSS)—i.e., low spatial frequency LIPSS (LSFL), hierarchical structures consisting of grooves superimposed with high spatial frequency LIPSS (HSFL) and Triangular shaped Nanopillars (TNP)—using a picosecond pulsed laser source. The effect of LIPSS on the wettability

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6

Shohag, Md Abu S., Zhengqian Jiang, Emily C. Hammel, et al. "Development of friction-induced triboluminescent sensor for load monitoring." Journal of Intelligent Material Systems and Structures 29, no. 5 (2017): 883–95. http://dx.doi.org/10.1177/1045389x17721049.

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Real-time load monitoring of critical civil and mechanical structures especially dynamic structures such as wind turbine blades is imperative for longer service life. This article proposed a novel sensor system based on the proprietary in situ triboluminescent optical fiber (ITOF) sensor for dynamic load monitoring. The new ITOF sensor patch consists of an ITOF sensor network with micro-exciters integrated within a polymer matrix. The sensor patch was subjected to repeated flexural loading and produced triboluminescent emissions due to the friction between micro-exciters and ITOF sensors corre

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7

Zheng, Jin, Bo Chen, and Chun Yang Ye. "Energy Properties of Building Structures Subjected to Strong Earthquake." Advanced Materials Research 150-151 (October 2010): 1570–73. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.1570.

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The evaluation on energy characteristics of earthquake-excited building structures with seismic protection devices is actively carried out in this study. The mechanical model of passive friction dampers is first introduced and the dynamic model of building-damper system is proposed. The evaluation criteria of energy responses are developed and applied to the earthquake response mitigation of a real multi-story building incorporated with friction dampers. The observations indicate that the earthquake-induced vibration of the structure can be substantially suppressed and the proposed energy eval

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8

Onufrijevs, Pavels, Liga Grase, Juozas Padgurskas, et al. "Anisotropy of the Tribological Performance of Periodically Oxidated Laser-Induced Periodic Surface Structures." Coatings 13, no. 7 (2023): 1199. http://dx.doi.org/10.3390/coatings13071199.

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Laser-induced periodic surface structures (LIPSS) enable advanced surface functionalization with broad applications in various fields such as micro- and nanoelectronics, medicine, microbiology, tribology, anti-icing systems, and more. This study demonstrates the possibility of achieving anisotropy in the tribological behavior of C45-grade steel structured by nanosecond laser radiation using the LIPSS method. The lateral surface of the steel roller was irradiated with a pulsed Nd:YAG laser at an optimum intensity I = 870 MW/cm2 for the formation of LIPSS. Two sets of samples were formed with LI

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9

Dong, Ping, and Jian Fan. "Semiactive Wind Response Control of 76-Story Benchmark Building with Smart Piezoelectric Friction Dampers." Advanced Materials Research 250-253 (May 2011): 2196–201. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2196.

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A smart piezoelectric friction damper (SPFD) is presented based on improved Pall friction dampers and its damping force model is analyzed. The wind-induced vibration control of Benchmark model using semi-active control strategies based on the classical LQR is studied. The results of simulation analysis show that the semi-active control effects of the standard wind-control model with SPFD is evident. Compared to uncontrolled structures, the wind-induced vibration responses of the controlled structures are effectively reduced. In addition, parameter optimization of the semi-active control system

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10

Kolesnikov, V. I., S. F. Ermakov, E. B. Shershnev, and A. P. Sychev. "Structural-induced lubricity of liquid crystal nanomaterials of cholesterol at metal friction." Доклады Академии наук 488, no. 1 (2019): 24–28. http://dx.doi.org/10.31857/s0869-5652488124-28.

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Experimentally, it was found that with the change in temperature there is a structural-induced increase in the lubricating capacity of liquid-crystal nanomaterials induced by transformations in the cholesteric mesophase. It is shown that in this temperature range, the minimum values of the friction coefficient practically coincide with the peak values of the dynamic viscosity, which together indicates in favor of the ordered state of the cholesterol liquid-crystal structures at these temperatures. As a result, it can be assumed that in this temperature range, spirally twisted layers of liquid-

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11

BOUCHAALA, NOUSSA, JEAN LUC DION, NICOLAS PEYRET, and MOHAMED HADDAR. "MICRO-SLIP INDUCED DAMPING IN THE CONTACT OF NOMINALLY FLAT SURFACES." International Journal of Applied Mechanics 05, no. 01 (2013): 1350005. http://dx.doi.org/10.1142/s1758825113500051.

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It is well known that the friction between interfaces at bolted joints plays a major role in the damping of assembly structures. Friction can be either induced by macro-slipping or micro-slipping. The aim of this paper is to model and quantify the dissipated energy by micro-sliding down to the scale of roughness between two flat surfaces in order to compute the damping ratio. It was assumed that the coefficient of friction between two materials is constant and that friction is the only source of energy dissipation. An experimental study was conducted to measure static normal load and dynamic t

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12

Alnusirat, Walid, Maksym Kyrychok, Stefano Bellucci, and Iaroslav Gnilitskyi. "Impact of Ultrashort Laser Nanostructuring on Friction Properties of AISI 314 LVC." Symmetry 13, no. 6 (2021): 1049. http://dx.doi.org/10.3390/sym13061049.

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Laser irradiation yields a powerful tool to modify the symmetry and asymmetry features of materials surfaces. In this paper, femtosecond laser-induced periodic surface structures were applied on stainless steel AISI 314, specially hardened by a low-vacuum carburizing procedure. Symmetry modifications in the surface’s morphology and chemistry before and after the laser treatment were investigated by SEM and EDS, respectively. Coefficient of friction (COF) was observed in dry sliding condition by using block-on-ring sliding test. The results show that COF values are substantially lower after las

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13

Roh, Ji-Eun, Moo-Won Hur, Hyun-Hoon Choi, and Sang-Hyun Lee. "Development of a Multiaction Hybrid Damper for Passive Energy Dissipation." Shock and Vibration 2018 (2018): 1–16. http://dx.doi.org/10.1155/2018/5630746.

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A multiaction hybrid damper (MHD) is designed to have independent hysteretic characteristics under small and large loading conditions, and its control performance for building structures excited by wind or earthquake load is verified. The MHD is composed of steel elements, two friction pads, and two lead rubber bearings (LRBs). Because the friction pads and the LRBs are in series connection, only the LRBs deform before the friction pad slippage occurs. After the friction slippage, the damper deformation concentrates on the friction pads. The initial stiffness and hysteresis are dependent on th

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14

Kustov, Sergey, Andrey Saren, Bruno D’Agosto, Konstantin Sapozhnikov, Vladimir Nikolaev, and Kari Ullakko. "Transitory Ultrasonic Absorption in “Domain Engineered” Structures of 10 M Ni-Mn-Ga Martensite." Metals 11, no. 10 (2021): 1505. http://dx.doi.org/10.3390/met11101505.

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In this work we create in 10 M Ni-Mn-Ga martensitic samples special martensitic variant structures consisting of only three twins separated by two a/c twin boundaries: Type I and Type II, with relatively low and very high mobility, respectively. The “domain engineered” structure thus created allows us to investigate the dynamics of a single highly mobile a/c twin boundary (TB). We show that temperature variations between 290 and 173 K in our samples induce an intense transitory internal friction at ultrasonic frequencies ca. 100 kHz, peaking around 215 K. A comparison is made of the data for t

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15

Scarano, F., K. U. Kempaiah, and M. Kotsonis. "PIV Analysis Of Skin Friction And Coherent Structures In Turbulent Drag Reduction Regimes." Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics 20 (July 11, 2022): 1–14. http://dx.doi.org/10.55037/lxlaser.20th.148.

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In the present work, planar and tomographic PIV are used to investigate how the organisation of wall turbulence is altered when actuators are operated with the objective of reducing the skin friction drag. When the wall is mechanically oscillated in the spanwise direction, high-resolution planar PIV enable the direct measurement of wall shear and a 15% reduction of skin friction is observed. The use of tomographic PIV enables access to the threedimensional organisation of low- and high-speed streaks, along with ejection events and associated hairpin vortices. These observations help forming a

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16

Kato, Hirotaka, Masato Sasase, and Nobuaki Suiya. "Friction-induced ultra-fine and nanocrystalline structures on metal surfaces in dry sliding." Tribology International 43, no. 5-6 (2010): 925–28. http://dx.doi.org/10.1016/j.triboint.2009.12.040.

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17

Bel Hadj Ali, Nizar, Ann C. Sychterz, and Ian F. C. Smith. "A dynamic-relaxation formulation for analysis of cable structures with sliding-induced friction." International Journal of Solids and Structures 126-127 (November 2017): 240–51. http://dx.doi.org/10.1016/j.ijsolstr.2017.08.008.

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18

Fu, Hua, Fei Kang, Shanglin Liu, and Xi Kang. "Effect of Track Support Structures on Friction-Induced Vibrations of Wheelset-Track Systems." Shock and Vibration 2023 (August 14, 2023): 1–10. http://dx.doi.org/10.1155/2023/7400955.

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The aim of the present investigation is to study the effect of track support structures on the metro 5th to 8th-order out-of-round (OOR) wheel caused by friction-induced vibrations. Three finite element models of metro-leading wheelset-track systems with three types of track support structures were established. The motion stabilities of these systems were studied using the complex feature value method. Three unstable vibrations that may cause the formation of the 5th to 8th order wheel OOR profiles were predicted. The simulation results show that the saturated creep forces can lead to unstable

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19

Rusli, Meifal, Mulyadi Bur, and Lovely Son. "Dynamic Vibration Absorber for Squeal Noise Suppression in Simple Model Structures." International Journal of Structural Stability and Dynamics 15, no. 05 (2015): 1450078. http://dx.doi.org/10.1142/s0219455414500783.

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In recent research it was found that squeal noise caused by friction-induced vibration can result in mode coupling instability. Presently, there is no method that can be reliably used to eliminate this kind of noise. This paper is focused on the use of dynamic vibration absorbers (DVAs) to suppress the generation of squeal noise. The performance of the DVA is investigated numerically for two simple cases, i.e. a simple two-degree of freedom model, and an L-shape space frame. It is found that the DVA can be applied to shifting or reducing the unstable region of mode coupling, by which the unsta

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20

Madgounkar, Sachin Sunil, Naveen Kumar H. S, and Chethan Gowda R. K. "Comparative Study on Seismic Behavior of High–Rise Steel Building with and Without Friction Damper and Fluid Viscous Damper: A Review." International Journal for Research in Applied Science and Engineering Technology 10, no. 8 (2022): 1649–53. http://dx.doi.org/10.22214/ijraset.2022.46373.

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Abstract: Seismic forces are induced on the structure present in earthquake prone areas. These are induced due to the movement of tectonic plates. Multi-storey buildings are those that have more than two stories, hence undergo large amount of deflection due to their slender structure. Due to the deflection caused by the ground accelerations during earthquakes, the structure is unstable and the structure undergoes damage which is not safe. Passive energy dissipation devices are gaining significance in design of earthquake resistant structures because of their effective performance in controllin

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21

Shabashov, Valery, Lev Korshunov, Kirill Kozlov, et al. "Structure–Phase Transitions in the Friction Contact Zone of High-Nitrogen Chromium–Manganese Austenitic Steel." Metals 13, no. 8 (2023): 1433. http://dx.doi.org/10.3390/met13081433.

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The influence of contact stresses on the phase and concentration composition of thin surface layers and wear products in the tribological contact zone of high-nitrogen FeMn22Cr18N0.83 steel was studied using Mössbauer spectroscopy, X-ray structural analysis, and electron microscopy. It was shown that contact compressive stresses developing under the conditions of dry sliding friction in the surface layers (20–25 microns) resulted in the strain-induced dissolution of cellular precipitation products (nitrides Cr2N) and increased the average content of nitrogen in austenite. Antiferromagnetic ord

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22

Oance, Ionuț-Sergiu, and Sunai Gelmambet. "Effect of Number and Position of Rotational Friction Dampers on Seismic Response of Steel Frame." Ovidius University Annals of Constanta - Series Civil Engineering 21, no. 1 (2019): 99–104. http://dx.doi.org/10.2478/ouacsce-2019-0011.

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Abstract This paper deals with effect of number and position of friction dampers on seismic response of 2D steel frame. For the present study four structures with six storeys are subjected to a time history analysis. For each story are using two, four and six friction dampers with different positions keeping slip load and stiffness constant. To study the effect of number and position of dampers in structures, are analysed the time period, top roof displacement, maximum base shear and percentage energy dissipated in accordance with energy induced in the frame. The results indicate that number a

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23

Oliaei, Mohammadreza, Mahdi Mashhadiyan, and Reza Forootan. "Seismic Performance Evaluation of Friction Damper and Yielding Metallic Damper in Steel Frame." Journal of Civil Engineering Researchers 5, no. 3 (2023): 1–14. http://dx.doi.org/10.61186/jcer.5.3.1.

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Анотація:

In recent decades, various control systems have been studied to reduce the vibrations of structures under dynamic forces. Generally, types of structural control systems are classified into energy dissipation systems and seismic isolation systems. Examples of energy dissipation systems include metallic yielding dampers, friction dampers, viscoelastic dampers, viscous dampers, tunable mass dampers, and tunable liquid dampers. This article investigates the seismic performance of friction dampers and metallic yielding dampers in steel frames, as well as the performance of a two-story steel frame s

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24

Chmielewski, T., D. Golański, W. Włosiński, and J. Zimmerman. "Utilizing the energy of kinetic friction for the metallization of ceramics." Bulletin of the Polish Academy of Sciences Technical Sciences 63, no. 1 (2015): 201–7. http://dx.doi.org/10.1515/bpasts-2015-0023.

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Abstract The paper is concerned with the metallization of ceramic materials using the friction-welding method in which the mechanism of the formation of a joint involves the kinetic energy of friction. The friction energy is directly transformed into heat and delivered in a specified amount precisely to the joint being formed between the metallic layer and the substrate material. The paper describes the ceramic metallization process, which has been developed by the present authors based on the friction-welding method. The stress and temperature fields induced in the joint during the metallizat

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25

Mondal, Papiya D., Aparna D. Ghosh, and Subrata Chakraborty. "Performances of Various Base Isolation Systems in Mitigation of Structural Vibration Due to Underground Blast Induced Ground Motion." International Journal of Structural Stability and Dynamics 17, no. 04 (2017): 1750043. http://dx.doi.org/10.1142/s0219455417500432.

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A comparative study is carried out on the performance of various elastomeric and frictional base isolation (BI) systems in the vibration mitigation of structures subjected to underground blast induced ground motion (BIGM). The parametric sensitivities of the base isolated structures to variations in the design parameters of the isolators are examined for different intensities of blast input. Results indicate that substantial reductions in both the acceleration and displacement responses of the structure can be achieved by the different base isolators. Generally, the Electricite de France (EDF)

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26

Raillard, Brice, Carsten Gachot, Michael Hans, Peter Leibenguth, and Frank Mücklich. "Microstructural characterization of laser-irradiated bulk copper under dry sliding conditions." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 226, no. 6 (2012): 541–51. http://dx.doi.org/10.1177/1350650112440924.

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The functionalization of surfaces for tribological applications is still a challenging task. There are numerous techniques for improving the friction and wear behaviour of metallic surfaces ranging from different coatings to textured surfaces. A promising approach for textured surfaces is the usage of laser interference patterning by a pulsed nanosecond Nd:YAG laser. Copper samples have been laser patterned using the laser interference metallurgy process. The resulting topographies were evaluated by white light interferometry and scanning electron microscopy in order to study the homogeneity o

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27

Murzin, Serguei P., Valeriy B. Balyakin, Gerhard Liedl, Alexey A. Melnikov, and Roland Fürbacher. "Improving Tribological Properties of Stainless Steel Surfaces by Femtosecond Laser Irradiation." Coatings 10, no. 7 (2020): 606. http://dx.doi.org/10.3390/coatings10070606.

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A possibility of improving tribological properties by femtosecond laser irradiation on an example of a steel surface by creating regularly arranged micro-grooved textures that contain self-organized microstructures and nano laser-induced periodic surface structures (LIPSS) was determined. The friction coefficient of the treated surface of a sample of cold-rolled 1.4301 stainless steel was evaluated using a CSM Instruments SA tribometer according to a Pin-on-disk test scheme at a specific pressure of 1 MPa. It was found that the coefficient of friction was reduced by 35% compared to the initial

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28

Lai, Guangxin, Yanli He, Yanguo Zhao, and Limei Zhang. "Influence of Friction Coefficient between Cable and Membrane on Wind-Induced Response of Air-Supported Membrane Structures with Oblique Cable Net." Buildings 13, no. 3 (2023): 649. http://dx.doi.org/10.3390/buildings13030649.

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Cable-membrane constructions typically exhibit significant displacement and distortion under load action, and the cable-membrane contact results in relative sliding. In this paper, the interaction force between cable and membrane is transferred through frictional contact action, and as a result, the friction coefficient must be taken into consideration for the form-finding and load analysis of air-supported membrane structures. Eight kinds of P-type membrane materials commonly used in engineering were chosen, and the friction coefficients between the various membrane and cable materials were o

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29

Zhou, Guangwu, Peng Li, Daxin Liao, Yuhao Zhang, and Ping Zhong. "The Friction-Induced Vibration of Water-Lubricated Rubber Bearings during the Shutdown Process." Materials 13, no. 24 (2020): 5818. http://dx.doi.org/10.3390/ma13245818.

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The vibration noise generated by water-lubricated rubber bearings (WLRBs) seriously reduces the concealment of a ship’s navigation. The purpose of this study was to obtain the relationships between friction-induced vibration and the friction coefficient, specific pressure, temperature, and stiffness of the bearing support during the shutdown process of WLRBs. Using transient dynamic analysis (Abaqus/Standard), the shutdown process of the bearing system was simulated by setting a friction coefficient curve, and with the fast Fourier transform (FFT), the data in the time domain were then convert

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30

Zhang, Peng Bo, Yu Ping Sun, and Shi Chun Zhao. "Vibration Mitigation Effect of a Friction Damper with Variable Resistances on the Steel Frame Structure." Advanced Materials Research 255-260 (May 2011): 2560–67. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.2560.

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Analytical study was conducted to investigate effect of friction dampers on vibration control of steel frame structures. The friction dampers installed in a ten-storey sample frame structure have two levels of fictional resistances. Unlike the conventional friction damper which has one frictional resistance, the friction dampers with variable resistances (VRFD) can apply two levels of frictional resistances, the lower resistance of which is attended to absorb the seismic energy by a moderate earthquake or a strong wind, and the higher one of which is expected to dissipate the seismic energy in

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31

LUO, ALBERT C. J., and BRANDON C. GEGG. "DYNAMICS OF A HARMONICALLY EXCITED OSCILLATOR WITH DRY-FRICTION ON A SINUSOIDALLY TIME-VARYING, TRAVELING SURFACE." International Journal of Bifurcation and Chaos 16, no. 12 (2006): 3539–66. http://dx.doi.org/10.1142/s0218127406016975.

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In this paper, periodic motion in an oscillator moving on the periodically traveling belts with dry friction is investigated. The conditions of stick and nonstick motions for such an oscillator are obtained in the relative motion frame, and the grazing and stick (or sliding) bifurcations are presented as well. The periodic motions of such an oscillator are predicted analytically and numerically, and the analytical prediction is based on the appropriate mapping structures. The local stability and bifurcation for such periodic motions are obtained. The periodic motions are illustrated through th

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32

Luo, Albert C. J., and Brandon C. Gegg. "Periodic Motions in a Periodically Forced Oscillator Moving on an Oscillating Belt With Dry Friction." Journal of Computational and Nonlinear Dynamics 1, no. 3 (2006): 212–20. http://dx.doi.org/10.1115/1.2198874.

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In this paper, periodic motion in an oscillator moving on a periodically oscillating belt with dry friction is investigated. The conditions of stick and nonstick motions for such an oscillator are obtained in the relative motion frame, and the grazing and stick (or sliding) bifurcations are presented as well. The periodic motions are predicted analytically and numerically, and the analytical prediction is based on the appropriate mapping structures. The eigenvalue analysis of such periodic motions is carried out. The periodic motions are illustrated through the displacement, velocity, and forc

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33

Emery, T. R., Janice M. Dulieu-Barton, and P. R. Cunningham. "Identification of Damage in Composite Structures Using Thermoelastic Stress Analysis." Key Engineering Materials 293-294 (September 2005): 583–90. http://dx.doi.org/10.4028/www.scientific.net/kem.293-294.583.

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The application of a cyclic load on a composite material containing damage has the effect of heating due to the material viscoelasticity. This is exaggerated in the proximity of interlaminar failure because of friction between plies. Quantitatively studying a stressed component subject to these conditions using Thermoelastic Stress Analysis (TSA) has been inaccurate, as the localised heating has an effect on the thermoelastic response. Hence the thermoelastic signal from damaging composites will contain a stress-induced component and a temperature-induced component. In this paper a process is

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34

Schille, Jörg, Lutz Schneider, Stefan Mauersberger, et al. "High-Rate Laser Surface Texturing for Advanced Tribological Functionality." Lubricants 8, no. 3 (2020): 33. http://dx.doi.org/10.3390/lubricants8030033.

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Анотація:

This article features with the enhancement of the static coefficient of friction by laser texturing the contact surfaces of tribological systems tested under dry friction conditions. The high-rate laser technology was applied for surface texturing at unprecedented processing rates, namely using powerful ultrashort pulses lasers in combination with ultrafast polygon-mirror based scan systems. The laser textured surfaces were analyzed by ion beam slope cutting and Raman measurements, showing a crystallographic disordering of the produced microscopic surface features. The laser induced self-organ

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35

Zawadzki, Paweł, Sergey Dobrotvorskiy, Borys Aleksenko, and Rafał Talar. "Effect of Nanosecond Laser Texturization on Tribological Behavior of AISI 321 Stainless Steel." Materials 17, no. 23 (2024): 5870. http://dx.doi.org/10.3390/ma17235870.

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Анотація:

This study investigates how laser-induced surface modifications influence key properties such as wear resistance, hardness, and friction in dry and lubricated conditions. The research applies nanosecond pulsed laser treatment to create random, quasi-random, quasi-periodic, and periodic surface structures on the steel surface, aiming to enhance the wear resistance and reduce the coefficient of friction (COF). The frictional performance between the carbon steel ball and the texturized surface was evaluated, including an analysis of the initial friction phase contact (single, double, and multi-co

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36

Baramsky, Nicolaj, Arthur Seibel, and Josef Schlattmann. "Friction-Induced Vibrations during Tightening of Bolted Joints—Analytical and Experimental Results." Vibration 1, no. 2 (2018): 312–37. http://dx.doi.org/10.3390/vibration1020021.

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Анотація:

Bolted joints are one of the most used machine elements. Holding together structures of all sizes, the integrity rests on their shoulders. Thus, an accurate and reliable assembly of the joint is crucial. While it is the aim to not experience friction-induced vibrations at all, at some situations, it is unavoidable. These cases, however, have yet been out of the focus of control algorithms due to the volatile nature of the process. This contribution delivers analytical and experimental results for the occurrence of friction-induced vibrations during tightening of bolted joints. Previous finding

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37

Yu, Haidong, Yunyong Li, Xun Xu, and Bin Zheng. "Out-of-plane distortion prediction of large thin-walled structures induced by friction stir welding." Science and Technology of Welding and Joining 25, no. 1 (2019): 45–55. http://dx.doi.org/10.1080/13621718.2019.1610603.

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38

Zahmatkesh, Farshad, Mohd Hanim Osman, and Elnaz Talebi. "Thermal Behaviour of Beams with Slant End-Plate Connection Subjected to Nonsymmetric Gravity Load." Scientific World Journal 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/323206.

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Анотація:

Research on the steel structures with confining of axial expansion in fixed beams has been quite intensive in the past decade. It is well established that the thermal behaviour has a key influence on steel structural behaviours. This paper describes mechanical behaviour of beams with bolted slant end-plate connection with nonsymmetric gravity load, subjected to temperature increase. Furthermore, the performance of slant connections of beams in steel moment frame structures in the elastic field is investigated. The proposed model proved that this flexible connection system could successfully de

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39

Sivanandh, Kaithepalli Subrahmanya Sai. "Experimental Investigations and Finite Element Simulation of Friction Stir Welding of Various Aluminium Alloys AA2024 and AA2519." International Journal for Research in Applied Science and Engineering Technology 11, no. 6 (2023): 92–101. http://dx.doi.org/10.22214/ijraset.2023.53576.

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Abstract: In friction stir welding (FSW), a rotating spherical leg tool is forced to plunge into the plates to be welded and moved along their contact line. The tool penetrates into the work pieces. During this operation, frictional heat that’s generated by contact friction between the tool and work piece. The plasticized material is stirred by the tool and forced to “flow’’ to the side and the reverse of the tool advantage as the temperature cools down, a solid nonstop joint between the two plates is than formed. In this project work, DEFORM -3D is used to perform the finite element analysis

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40

Nie, Lin, Yunxin Wu, Hai Gong, Dan Chen, and Xudong Guo. "Effect of Shot Peening on Redistribution of Residual Stress Field in Friction Stir Welding of 2219 Aluminum Alloy." Materials 13, no. 14 (2020): 3169. http://dx.doi.org/10.3390/ma13143169.

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Анотація:

Welding is one of the essential stages in the manufacturing process of mechanical structures. Friction stir welding structure of aluminum alloy has been used as a primary supporting member in aerospace equipment. However, friction stir welding inevitably generates residual stress that promotes the initiation and propagation of cracks, threatening the performance of the welded structure. Shot peening can effectively change the distribution of residual stress and improve the fatigue properties of materials. In this paper, friction stir welding and shot peening are performed on 2219 aluminum allo

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41

Alves-Lopes, Almeida, Oliveira, and Vilar. "Influence of Femtosecond Laser Surface Nanotexturing on the Friction Behavior of Silicon Sliding Against PTFE." Nanomaterials 9, no. 9 (2019): 1237. http://dx.doi.org/10.3390/nano9091237.

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The aim of the present work was to investigate the influence of laser-induced periodic surface structures (LIPSS) produced by femtosecond laser on the friction behavior of silicon sliding on polytetrafluoroethylene (PTFE) in unlubricated conditions. Tribological tests were performed on polished and textured samples in air using a ball-on-flat nanotribometer, in order to evaluate the friction coefficient of polished and textured silicon samples, parallel and perpendicularly to the LIPSS orientation. In the polished specimens, the friction coefficient decreases with testing time at 5 mN, while i

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42

Zhang, Xian, Yingchun Xie, Peng Lyu, Donghong Ning, and Zhixiong Li. "Study on Vibration Characteristics of Multi-Beam Structures with Stick and Slip at Joints." Applied Sciences 15, no. 3 (2025): 1141. https://doi.org/10.3390/app15031141.

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Анотація:

Stick–slip phenomena may manifest at the joints during cyclic vibrations in beam structures connected by some forms of joint. This work incorporates the sticking–slip effect of joint connections into the dynamic analysis framework of multi-beam structures through changes in friction forces. The system characteristic equation is solved using the incremental harmonic balance method, the vibration characteristics of the connected structure are explored through the dynamic response, and the accuracy of the model established in this paper is verified through experiments. The equivalent stiffness an

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43

Guillou, Nicolas. "Modelling the Effects of Oyster Tables on Estuarine Tidal Flow." Coasts 3, no. 1 (2023): 2–23. http://dx.doi.org/10.3390/coasts3010002.

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Oyster farming may impact the estuarine tidal circulation with a series of effects on environmental conditions and cultures’ growth. Hydrodynamic numerical models set up in estuaries integrated the presence of oyster structures by simply increasing the bottom friction coefficient over farming areas. However, for elevated oyster tables in tidal environments, such default calibration ignored the temporal variations of the friction coefficient between the conditions of submerged or unsubmerged structures. Thus, an original formulation of the Chézy coefficient was here proposed to integrate these

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44

Mizubayashi, H., I. Sakata, and H. Tanimoto. "Mechanical Spectroscopy Study on the Light Soaking Effect on Hydrogenated Amorphous Silicon." Solid State Phenomena 184 (January 2012): 416–21. http://dx.doi.org/10.4028/www.scientific.net/ssp.184.416.

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For hydrogenated amorphous silicon (a-Si:H) films deposited at temperatures between 423 K and 623 K (a-Si:H423Kand so on), the light-induced changes in the internal friction between 80 K and 400 K were studied. The internal friction is associated with H2motion in microvoid networks, and shows the mild temperature dependence between about 80 K and 300 K (Q-180-300K) and the almost linear increase above 300 K (Q-1>300K). BothQ-180-300KandQ-1>300Kdecrease with increasing the deposition temperature, and show the mild temperature dependence ina-Si:H623K. The white light soaking with 100 mW/cm

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45

LUO, ALBERT C. J., and MOZHDEH S. FARAJI MOSADMAN. "SINGULARITY, SWITCHABILITY AND BIFURCATIONS IN A 2-DOF, PERIODICALLY FORCED, FRICTIONAL OSCILLATOR." International Journal of Bifurcation and Chaos 23, no. 03 (2013): 1330009. http://dx.doi.org/10.1142/s0218127413300097.

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In this paper, the analytical dynamics for singularity, switchability, and bifurcations of a 2-DOF friction-induced oscillator is investigated. The analytical conditions of the domain flow switchability at the boundaries and edges are developed from the theory of discontinuous dynamical systems, and the switchability conditions of boundary flows from domain and edge flows are presented. From the singularity and switchability of flow to the boundary, grazing, sliding and edge bifurcations are obtained. For a better understanding of the motion complexity of such a frictional oscillator, switchin

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46

Pires, Ingrid, Helon Vicente Hultmann Ayala, and Hans Ingo Weber. "Nonlinear ensemble gray and black-box system identification of friction induced vibrations in slender rotating structures." Mechanical Systems and Signal Processing 186 (March 2023): 109815. http://dx.doi.org/10.1016/j.ymssp.2022.109815.

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47

Gräf, Stephan. "Formation of laser-induced periodic surface structures on different materials: fundamentals, properties and applications." Advanced Optical Technologies 9, no. 1-2 (2020): 11–39. http://dx.doi.org/10.1515/aot-2019-0062.

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Анотація:

AbstractThe use of ultra-short pulsed lasers enables the fabrication of laser-induced periodic surface structures (LIPSS) on various materials following a single-step, direct-writing technique. These specific, well-ordered nanostructures with periodicities in the order of the utilised laser wavelength facilitate the engineering of surfaces with functional properties. This review paper discusses the physical background of LIPSS formation on substrates with different material properties. Using the examples of structural colours, specific wetting states and the reduction of friction and wear, thi

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48

Kashaev, Nikolai, Sergey Chupakhin, Volker Ventzke, et al. "Fatigue Life Extension of AA2024 Specimens and Integral Structures by Laser Shock Peening." MATEC Web of Conferences 165 (2018): 18001. http://dx.doi.org/10.1051/matecconf/201816518001.

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Анотація:

The goal of the present study is to understand the effects of laser shock peening (LSP)-induced residual stresses on the fatigue crack propagation (FCP) behaviour of the commonly used aircraft aluminium alloy AA2024 in T3 heat treatment condition. LSP treatment was performed using a pulsed Nd:YAG laser on compact tensile C(T)50-specimens with a thickness of 2.0 mm. LSP-treated specimens reveal a significant retardation of the fatigue crack propagation. The fatigue crack retardation effect can be correlated with the compressive residual stresses introduced by LSP throughout the entire specimen

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49

Okamura, Shigeki, Satoshi Fujita, and Masayoshi Ikenaga. "Motion Analysis of Pendulum-Type Isolation Systems During Earthquakes: Dynamic Test and Response Analysis on a Three Story Steel Frame Model Supported by Four Friction Pendulum Bearings." Journal of Pressure Vessel Technology 126, no. 1 (2004): 34–45. http://dx.doi.org/10.1115/1.1636789.

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Анотація:

After the Hanshin-Awaji Earthquake Disaster, the number of earthquake isolated buildings is increasing. Most of the base isolated buildings or structures are built on laminated rubber bearings in order to give them certain natural periods. This situation, however, also encourages structural engineers to research and develop nonrubber-type isolation systems such as linear motion bearing isolators and friction pendulum systems. It is considered that the nonrubber-type isolation systems can be applied to important industrial facilities, such as LNG tanks, boiler facilities and so on to refine the

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50

Nosonovsky, Michael, and Bharat Bhushan. "Thermodynamics of surface degradation, self-organization and self-healing for biomimetic surfaces." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 367, no. 1893 (2009): 1607–27. http://dx.doi.org/10.1098/rsta.2009.0009.

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Анотація:

Friction is a dissipative irreversible process; therefore, entropy is produced during frictional contact. The rate of entropy production can serve as a measure of degradation (e.g. wear). However, in many cases friction leads to self-organization at the surface. This is because the excess entropy is either driven away from the surface, or it is released at the nanoscale, while the mesoscale entropy decreases. As a result, the orderliness at the surface grows. Self-organization leads to surface secondary structures either due to the mutual adjustment of the contacting surfaces (e.g. by wear) or

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