Bibliografías temáticas / Joint roughness number

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Literatura académica sobre el tema "Joint roughness number"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 17 de febrero de 2022

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Artículos de revistas sobre el tema "Joint roughness number"

Yong, Rui, Leiyu Gu, Jun Ye, et al. "Neutrosophic Function with NNs for Analyzing and Expressing Anisotropy Characteristic and Scale Effect of Joint Surface Roughness." Mathematical Problems in Engineering 2019 (April 14, 2019): 1–11. http://dx.doi.org/10.1155/2019/8718936.

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The shear behavior of rock mass significantly depends upon the surface roughness of rock joints which is generally characterized by the anisotropy characteristic and the scale effect. The large-scale natural rock joint surfaces, at Qingshi Town, southeast of Changshan County, Zhejiang Province, China, were used as a case study to analyze the roughness characteristics. A statistical assessment of joint roughness coefficient (JRC) indicated the roughness anisotropy of different sized rock joints. The lower limit (JRCmean-σ) was regarded as the determinate information, and the difference between

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Cao, Congcong, Keke Zhang, Baojin Shi, et al. "The Interface Microstructure and Shear Strength of Sn2.5Ag0.7Cu0.1RExNi/Cu Solder Joints under Thermal-Cycle Loading." Metals 9, no. 5 (2019): 518. http://dx.doi.org/10.3390/met9050518.

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The interface microstructure and shear strength of Sn2.5Ag0.7Cu0.1RExNi/Cu solder joints under thermal-cycle loading were investigated with scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and physical and chemical tests. The results show that an intermetallic compound (IMC) layer of Sn2.5Ag0.7Cu0.1RExNi/Cu solder joints evolved gradually from the scalloped into larger wavy forms with increasing number of thermal cycles. The roughness and average thickness of IMC increased with thermal-cycle loading. However, at longer thermal-cycle loading, the

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Ye, Jun, Jiqian Chen, Rui Yong, and Shigui Du. "Expression and Analysis of Joint Roughness Coefficient Using Neutrosophic Number Functions." Information 8, no. 2 (2017): 69. http://dx.doi.org/10.3390/info8020069.

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XIE, HEPING, WEIHONG XIE, and PENG ZHAO. "PHOTOELASTIC STUDY ON THE MECHANICAL PROPERTIES OF FRACTAL ROCK JOINTS." Fractals 04, no. 04 (1996): 521–31. http://dx.doi.org/10.1142/s0218348x96000637.

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In this paper, the fractal rock joints are manufactured on the photoelastic material plate. Based on the visualized photoelastic experiments, the mechanical properties of the fractal joints with different roughness (different fractal dimensions) are investigated under uniaxial and shear compression. The research results indicate that the joint roughness (the fractal dimension of the joints) significantly influences the peak shear strength, the position of the maximum shear stress, and the number of contact points.

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Yong, Rui, Shaonan Tan, Jun Ye, and Shigui Du. "Neutrosophic Function for Assessing the Scale Effect of the Rock Joint Surface Roughness." Mathematical Problems in Engineering 2021 (July 3, 2021): 1–11. http://dx.doi.org/10.1155/2021/6611627.

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A new investigation method is proposed for recording large-sized joint profiles and making statistical analyses of the joint roughness coefficient (JRC) values of the 10–300 cm sized profiles. The mechanical hand profilograph is used for joint roughness measurement due to its advantage of easy operation and high accuracy in recording joint traces. Based on the proposed method, it provides sufficient samples from various positions on the large joint profile, which allows the statistical evaluation of JRC values. A neutrosophic number (NN) is employed for revealing determinate and/or indetermina

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Lin, Hang, Jianxin Qin, Yixian Wang, and Yifan Chen. "Determination of Joint Surface Roughness Based on 3D Statistical Morphology Characteristic." Advances in Civil Engineering 2021 (September 3, 2021): 1–12. http://dx.doi.org/10.1155/2021/8813409.

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Roughness significantly affects the shear behavior of rock joints, which are widely encountered in geotechnical engineering. Since the existing calculation methods on the joint roughness coefficient (JRC) fail to obtain a sufficiently accurate value of JRC, a new determination method was proposed in this study, where the 3D laser scanning technique and self-compiled Python code, as well as the statistical parameter methods, were applied. Then, the shear strength of jointed rock was evaluated via Barton's model, and therefore, a comprehensive comparison between the calculating results and exper

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Choopani, Yahya, Mohsen Khajehzadeh, and Mohammad Reza Razfar. "Optimal parameters of abrasive flow finishing for hip joint implants." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 235, no. 11 (2021): 1818–31. http://dx.doi.org/10.1177/0954405421995614.

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Total hip arthroplasty (THA) is one of the most well-known orthopedic surgeries in the world which involves the substitution of the natural hip joint by prostheses. In this process, the surface roughness of the femoral head plays a pivotal role in the performance of hip joint implants. In this regard, the nano-finishing of the femoral head of the hip joint implants to achieve a uniform surface roughness with the lowest standard deviation is a major challenge in the conventional and advanced finishing processes. In the present study, the inverse replica fixture technique was used for automatic

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Mandolfino, Chiara, Enrico Lertora, and Carla Gambaro. "Effect of Surface Pretreatment on the Performance of Adhesive-Bonded Joints." Key Engineering Materials 554-557 (June 2013): 996–1006. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.996.

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This paper presents a systematic investigation of the influence of sandblasting pretreatment parameters on the surface roughness and mechanical characteristics of adhesive-bonded joints. The preliminary surface treatment in a bonding process has two important aims: first of all, it eliminates contaminants (dust, grease, humidity and corrosion products) which can modify the wettability of the substrate, then it increases surface roughness and, consequently, the contact area between substrate and adhesive, creating a mechanical interlocking that maximizes adhesion. To enhance the strength and av

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Baino, Francesco, Maria Angeles Montealegre, Joaquim Minguella-Canela, and Chiara Vitale-Brovarone. "Laser Surface Texturing of Alumina/Zirconia Composite Ceramics for Potential Use in Hip Joint Prosthesis." Coatings 9, no. 6 (2019): 369. http://dx.doi.org/10.3390/coatings9060369.

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The use of metal shell to fix an acetabular cup to bone in hip joint prosthesis carries some limitations, including restrictions in prosthetic femur ball diameter and in patient’s range of motion. These drawbacks could be ideally overcome by using a monolithic ceramic acetabular cup, but the fixation of such an implant to host bone still remains a challenge. Since porous surfaces are known to promote more bone tissue interlocking compared to smooth materials, in this work the surfaces of sintered alumina/zirconia composite ceramics were treated by a pulsed laser radiation at 1064 nm with a pul

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Lancaster, J. G., D. Dowson, G. H. Isaac, and J. Fisher. "The wear of ultra-high molecular weight polyethylene sliding on metallic and ceramic counterfaces representative of current femoral surfaces in joint replacement." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 211, no. 1 (1997): 17–24. http://dx.doi.org/10.1243/0954411971534647.

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A number of studies have investigated the influence of surface roughness on the wear of ultra-high molecular weight polyethylene (UHMWPE) in total joint replacement. The results of these studies have shown that the wear factor is proportional to the counterface roughness raised to a power greater than one. In this laboratory study, the effect of surface finish of several biomaterials on the wear of UHMWPE was studied. The study was conducted using reciprocating pin-on-plate wear tests with bovine serum as a lubricant. The biomaterials investigated as the counterface material included stainless

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Actas de conferencias sobre el tema "Joint roughness number"

Kameda, Takatsugu, Hideo Osaka, and Shinsuke Mochizuki. "Near-Wall Turbulent Structure for the Boundary Layer Developing Over a K-Type Rough Wall in Low-Reynolds-Number." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45191.

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Measurements of the mean and the turbulent velocities have performed in the vicinity of a roughness element for the turbulent boundary layer developed over a k-type rough wall, which consists of two-dimensional square ribs (10mm × 10mm × 400mm) arrayed with pitch ratio of 4. The Reynolds-number Rθ and k+ based on momentum thickness θ and roughness height k are about 500 and 50 respectively, and relative roughness height k / δ = 0.156. LDV (Laser Doppler Velocitimetry) that it is possible to measure reverse flow was applied to investigate the momentum-exchange process in the open-face (yT = 0(m

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Nyqvist, J., A. Kadiric, R. Sayles, and S. Ioannides. "Roughness Effects in Thermo-Mechanically Loaded Contacts." In STLE/ASME 2008 International Joint Tribology Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ijtc2008-71246.

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A recently developed thermo-mechanical model was used to investigate the influence of surface roughness characteristics on the maximum contact temperature rise as well as shear stresses in rough surface contacts subjected to normal and tangential loading. In order to identify prevailing trends clearly the surfaces were modelled as having idealised sinusoidal roughness. Following a brief description of the numerical model, results are presented to illustrate the dependence of contact temperature and stresses on roughness parameters such as wavelength and amplitude as well as the contact Peclet

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Okubo, Kyohei, Shunpei Suzuki, Yusuke Kuwata, and Yasuo Kawaguchi. "Laser Velocity and Surface Measurements Toward the Prediction of Turbulent Frictional Resistance on Irregular Rough Surface in Higher Reynolds Number Range." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5325.

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Abstract In this research, we consider the relationship between roughness of the wall and frictional resistance in the range of high-Reynolds number regime which is important for practical use, and its goal is to build a more accurate and highly versatile formula for predicting the frictional resistance acting on the complex surface with irregular roughness. In addition to the parameter corresponding to the distribution of the roughness used in a conventional and empirical formula, we aim to construct an empirical formula including the parameter representing the wavelength of the rough surface

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Harun, Zambri, Ashraf A. Abbas, and Bagus Nugroho. "Directional Surface Roughness Influence on Turbulent Flow Structure." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5615.

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Abstract A series of experiments have been conducted to investigate turbulent flow structures when it is exposed to a highly directional riblet-type surfaces roughness (converging-diverging/herringbone pattern) at a relatively low Reynolds number (Reτ). These experiments show that even at a low Reτ, the surface pattern is able to modify the turbulent boundary layer. Over the diverging region, we observe a decrease in drag penalty, while over the converging region there is an increase of drag penalty, which is indicated by the shift in the mean velocity profiles. The surface roughness also infl

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He´rout, Benjamin, Andre´ Giovannini, Henri-Claude Boisson, Riad Bensaid, and David Lo Jacono. "Experimental Study of Roughness Influence on a Turbulent Pipe Flow." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-23029.

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The main goal of this study is to obtain experimental data to develop adapted hydraulic and thermal wall functions used by industrial CFD codes. An experimental study, based on a test rig designed to reproduce realistic flow characteristics, has been conducted in order to explore velocity and temperature profiles. Hydraulic characterization of turbulent pipe flow was conducted over a Reynolds number range of 20 000 to 90 000, with three different test sections, presenting an increasing sand grain roughness. The three components of the flow velocity were measured, using laser Doppler velocimetr

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Boyle, R. J., and R. G. Senyitko. "Measurements and Predictions of Surface Roughness Effects on the Turbine Vane Aerodynamics." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38580.

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The aerodynamic performance of a turbine vane was measured in a linear cascade. These measurements were conducted for exit-true chord Reynolds numbers between 150,000 and 1,800,000. The vane surface rms roughness-to-true chord ratio was approximately 2 × 10−4. Measurements were made for exit Mach numbers between 0.3 and 0.9 to achieve different loading distributions. Measurements were made at three different inlet turbulence levels. High and intermediate turbulence levels were generated using two different blown grids. The turbulence was low when no grid was present. The wide range of Reynolds

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Wang, Shao, and Huyi Wang. "A Plasticity Index, a Plasticity Number, and the Distribution of the Plastic Deformation Depth Based on a Fractal-Regular Contact Model." In STLE/ASME 2008 International Joint Tribology Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ijtc2008-71199.

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A plasticity index and a plasticity number were proposed to indicate the severity of plastic deformation by considering the multi-scale and hierarchical nature of surface roughness. A distribution density function of the plastic deformation depth was introduced to characterize the evolution of plastic deformation with increasing load. By integrating this function, the fraction of the real contact area where plastic deformation depths are within any given range can be calculated.

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Nassar, S. A., and T. S. Sun. "Effect of Surface Roughness and Joint Material on Torque-Tension Relationship in Threaded Fasteners." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84116.

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An experimental study is presented in order to investigate the effect of surface roughness on the torque-tension relationship in bolted assemblies. Three levels of surface roughness are considered for the fastener underhead and the joint surface; namely, low, medium, and high levels of surface roughness. The study is conducted for two joint materials, two fastener classes, and for coarse and fine threads. In this study, the torque-tension data is expressed in terms of the value of the nut factor as well as its scatter. The effect of the number of tightenings on surface roughness and on the tor

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Matsumoto, A., T. Ito, M. Motozawa, et al. "Experimental Analysis of Non-Uniform Surface Roughness Affecting to Flow Resistance." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-31038.

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Experimental investigation on non-uniform surface roughness affecting to flow resistance has been carried out. Experiment was performed with the concentric cylinder device. In this experiment, we evaluated non-uniform surface roughness of various surface by the optical method and measured friction coefficient in turbulent flow over each surface roughness. As an evaluation of non-uniform surface roughness, we measured surface roughness profiles of each surface by a laser displacement sensor. Based on this surface roughness profiles, we calculated some roughness parameters such as the root mean

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Shin, Ju Hyun, and Seung Jin Song. "The Effect of Surface Roughness and Favorable Pressure Gradient on Turbulent Boundary Layers." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-22020.

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Rough wall turbulent boundary layers subjected to pressure gradient have engineering interest for many fluid machinery applications. A number of investigations have been made to understand surface roughness and pressure gradient effects on turbulent boundary layer characteristics, but separately. In this paper, turbulent boundary layers over a flat plate with surface roughness and favorable pressure gradient (FPG) are experimentally investigated. Boundary layers in different streamwise locations were measured using boundary layer type hot-wire anemometry. Rough wall zero pressure gradient (ZPG

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