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Journal articles on the topic 'Smooth bars'

Author: Grafiati

Published: 1 April 2023

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1

VOLINO, RALPH J., MICHAEL P. SCHULTZ, and KAREN A. FLACK. "Turbulence structure in boundary layers over periodic two- and three-dimensional roughness." Journal of Fluid Mechanics 676 (March 15, 2011): 172–90. http://dx.doi.org/10.1017/s0022112011000383.

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Measurements are presented from turbulent boundary layers over periodic two- and three-dimensional roughness. Cases with transverse rows of staggered cubes and cases with solid square transverse bars of two sizes were considered. Previous results by Volino, Schultz & Flack (J. Fluid Mech. vol. 635, 2009, p. 75) showed outer-layer similarity between cases with three-dimensional roughness and smooth walls, and deviations from similarity in cases with large two-dimensional transverse bars. The present results show that differences also occur with small two-dimensional bars and to a lesser ext

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2

Hayashi, Taro. "Orders of automorphisms of smooth plane curves for the automorphism groups to be cyclic." Arabian Journal of Mathematics 10, no. 2 (2021): 409–22. http://dx.doi.org/10.1007/s40065-021-00321-5.

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AbstractFor a fixed integer $$d\ge 4$$ d ≥ 4 , the list of groups that appear as automorphism groups of smooth plane curves whose degree is d is unknown, except for $$d=4$$ d = 4 or 5. Harui showed a certain characteristic about structures of automorphism groups of smooth plane curves. Badr and Bars began to study for certain orders of automorphisms and try to obtain exact structures of automorphism groups of smooth plane curves. In this paper, based on the result of T. Harui, we extend Badr–Bars study for different and new cases, mainly for the cases of cyclic groups that appear as automorphi

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3

Stone, L. S., J. Lorenceau, and B. R. Beutter. "Smooth Pursuit of a Partially Occluded Object." Perception 25, no. 1_suppl (1996): 150. http://dx.doi.org/10.1068/v96l0201.

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There has long been qualitative evidence that humans can pursue an object defined only by the motion of its parts (eg Steinbach, 1976 Vision Research16 1371 – 1375). We explored this quantitatively using an occluded diamond stimulus (Lorenceau and Shiffrar, 1992 Vision Research32 263 – 275). Four subjects (one naive) tracked a line-figure diamond moving along an elliptical path (0.9 Hz) either clockwise (CW) or counterclockwise (CCW) behind either an X-shaped aperture (CROSS) or two vertical rectangular apertures (BARS), which obscured the corners. Although the stimulus consisted of only four

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4

Silling, S. A. "Two-Dimensional Effects in the Necking of Elastic Bars." Journal of Applied Mechanics 55, no. 3 (1988): 530–35. http://dx.doi.org/10.1115/1.3125825.

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Numerical solutions for incompressible hyperelastic bars undergoing smooth necking in plane strain show complex phenomena in which two-dimensional effects are inherently important. In long bars, the two-dimensional effects are confined to a transition zone between the necked and non-necked phases. In spite of the two-dimensional effects, the nominal stress in necked long bars is close to the Maxwell stress under certain conditions. For very long bars there are necked equilibrium deformations in which the overall stretch is less than that of the maximum in the constitutive relation.

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5

Leonardi, S., P. Orlandi, L. Djenidi, and R. A. Antonia. "Heat transfer in a turbulent channel flow with square bars or circular rods on one wall." Journal of Fluid Mechanics 776 (July 13, 2015): 512–30. http://dx.doi.org/10.1017/jfm.2015.344.

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Direct numerical simulations (DNS) are carried out to study the passive heat transport in a turbulent channel flow with either square bars or circular rods on one wall. Several values of the pitch (${\it\lambda}$) to height ($k$) ratio and two Reynolds numbers are considered. The roughness increases the heat transfer by inducing ejections at the leading edge of the roughness elements. The amounts of heat transfer and mixing depend on the separation between the roughness elements, an increase in heat transfer accompanying an increase in drag. The ratio of non-dimensional heat flux to the non-di

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6

Nord, K. J., and T. J. Chung. "Fracture and surface flaws in smooth and threaded round bars." International Journal of Fracture 30, no. 1 (1986): 47–55. http://dx.doi.org/10.1007/bf00034578.

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7

Nemes, J. A., and J. Eftis. "Constitutive modeling of the dynamic fracture of smooth tensile bars." International Journal of Plasticity 9, no. 2 (1993): 243–70. http://dx.doi.org/10.1016/0749-6419(93)90031-k.

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8

Arani, Kamyar Karbasi, Mohammad S. Marefat, Marco Di Ludovico, Andrea Prota, and Gaetano Manfredi. "Hysteretic cyclic response of concrete columns reinforced with smooth bars." Bulletin of Earthquake Engineering 11, no. 6 (2013): 2033–53. http://dx.doi.org/10.1007/s10518-013-9469-9.

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9

Rimal, Hariram, Piyush Pradhan, Dipendra Gautam, and Rajesh Rupakhety. "Seismic Fragility of Aging Elevated Water Tank with Smooth Bars Considering Soil Structure Interaction." Buildings 13, no. 1 (2022): 4. http://dx.doi.org/10.3390/buildings13010004.

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The functionality of elevated water tanks is pivotal to assure after an earthquake as water supply is expected to be uninterrupted. Although elevated water tanks with deformed bars are widely studied, limited works exist for water tanks with smooth bars, although such tanks comprise a considerable fraction, even in the high seismic regions. To quantify the seismic vulnerability of aging elevated water tanks with smooth bars, we created analytical fragility functions for full, half, and empty reservoir conditions, considering fluid–structure and soil–structure interactions. The sum of findings

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10

Caruso, Claudia, Rita Bento, Romain Sousa, and António A. Correia. "Modelling strain penetration effects in RC walls with smooth steel bars." Magazine of Concrete Research 71, no. 17 (2019): 894–906. http://dx.doi.org/10.1680/jmacr.18.00052.

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11

COSENZA, EDOARDO, and ANDREA PROTA. "EXPERIMENTAL BEHAVIOUR AND NUMERICAL MODELLING OF SMOOTH STEEL BARS UNDER COMPRESSION." Journal of Earthquake Engineering 10, no. 3 (2006): 313–29. http://dx.doi.org/10.1080/13632460609350599.

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12

Hidaka, Souta, Yosuke Suzuishi, and Norimichi Kitagawa. "Investigating the Effects of Tactile Masking and Surface Texture on the Velvet Hand Illusion." Perception 47, no. 10-11 (2018): 1070–80. http://dx.doi.org/10.1177/0301006618805335.

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When we hold thin metallic bars between the palms of our hands and rub the palms against each other, the feeling of touching smooth velvet occurs. Previous studies have shown that tactile motion and pressure on the palms are important for this velvet hand illusion. Interestingly, when we experience this illusion, we cannot feel the texture of our palms as we usually do. In the present study, we investigated the possibility that tactile masking contributes to the occurrence of the velvet hand illusion. We measured vibrotactile detection performance on the palms of the hands during the occurrenc

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13

Uetani, Yasuhiro, Ryotaro Nagata, Hidetoshi Takagi, Kenji Matsuda, and Susumu Ikeno. "Simple Manufacturing Method for A7075 Aluminum Alloy Slurry with Fine Granules and Application to Rheo-Extrusion." Solid State Phenomena 116-117 (October 2006): 746–49. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.746.

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Semi-solid slurry of A7075 aluminum alloy with fine solid granules was tried simply to make by passing the melt through upright tube followed by inclined water-cooled tube. Structures of solidified slurries were granular and mean grain sizes of about 0.06 to 0.11mm could be obtained. When the slurries introduced into an extrusion container kept at semi-solid temperature 873K were extruded to round bars at various extrusion ratios and press ram speed of 10mm/s, just after cooling to 833K, they could easily be extruded to bars with smooth surfaces at lower forces. Although every tensile strength

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14

Bamonte, Patrick, Dario Coronelli, and Pietro G. Gambarova. "Smooth Anchored Bars in NSC and HPC: a Study on Size Effect." Journal of Advanced Concrete Technology 1, no. 1 (2003): 42–53. http://dx.doi.org/10.3151/jact.1.42.

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15

Xu, X. X., Q. C. Cai, and Y. Su. "A tensile stress criterion for cleavage in precracked, notched and smooth bars." International Journal of Fracture 50, no. 1 (1991): 51–65. http://dx.doi.org/10.1007/bf00035168.

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16

Prota, Andrea, Fiorenzo de Cicco, and Edoardo Cosenza. "Cyclic Behavior of Smooth Steel Reinforcing Bars: Experimental Analysis and Modeling Issues." Journal of Earthquake Engineering 13, no. 4 (2009): 500–519. http://dx.doi.org/10.1080/13632460902837686.

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17

Uetani, Yasuhiro, Ryotaro Nagata, Hidetoshi Takagi, Kenji Matsuda, and Susumu Ikeno. "Effect of Granule Size in Semi-Solid Slurry on Rheo-Extrusion of A7075 Aluminum Alloy." Materials Science Forum 561-565 (October 2007): 291–94. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.291.

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Rheo-extrusions of A7075 aluminum alloy were carried out utilizing semi-solid slurries with different solid granule sizes, which were made by a simple method combined a thin upright tube with a water-cooled tube. Every structure of slurries was granular and average solid granule sizes could be controlled by 0.05 to 0.11mm. These slurries were extruded to round bars at extrusion ratio of 36 and press ram speed of 10mm/s mainly, just after cooling to 833K ( fs > 0.9 ). All of the slurries could easily be extruded to bars with smooth surfaces at much low extrusion forces than those of hot-extr

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18

Gao, Jing, Penghai Xu, Lingyun Fan, and Giovanni Pietro Terrasi. "Study on Bond-Slip Behavior between Seawater Sea-Sand Concrete and Carbon Fiber-Reinforced Polymer (CFRP) Bars with Different Surface Shapes." Polymers 14, no. 13 (2022): 2689. http://dx.doi.org/10.3390/polym14132689.

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The application of CFRP bar and seawater sea-sand concrete (SSSC) in construction can overcome the shortcomings in conventional reinforced concrete, such as corrosion induced by carbonation and chloride ingress. In this study, the bond-slip behavior between an SSSC cube and CFRP bar has been investigated, and different CFRP bar surface shapes have been considered. A total of 27 specimens (9 groups) were fabricated for a pull-out test, where three types of CFRP bar with different surface shapes were used: smooth regular bars, double-wrapped bars and ribbed bars. Bond strength, bond-slip curve,

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19

Orlandi, Paolo, and Sergio Pirozzoli. "Secondary Flow in Smooth and Rough Turbulent Circular Pipes: Turbulence Kinetic Energy Budgets." Fluids 6, no. 12 (2021): 448. http://dx.doi.org/10.3390/fluids6120448.

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Direct Numerical Simulations have been performed for turbulent flow in circular pipes with smooth and corrugated walls. The numerical method, based on second-order finite discretization together with the immersed boundary technique, was validated and applied to various types of flows. The analysis is focused on the turbulence kinetic energy and its budget. Large differences have been found in the near-wall region at low Reynolds number. The change in the near-wall turbulent structures is responsible for increase of drag and turbulence kinetic energy. To investigatselinae the effects of wall co

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20

Xu, Xin Sheng. "Experimental Study and Numerical Simulation of Bond Behaviors Between FRP Bar and Concrete." Advanced Materials Research 168-170 (December 2010): 2134–38. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.2134.

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Surface-adhering-sand screw-thread-form FRP bar was produced. By symmetrical pull-out test research to a certain depth in FRP (Fiber Reinforced Polymer) bar concrete, the bond mechanism, the failure mechanism, the bond strength and the slip of FRP bar to concrete were studied systematically. Studies show that the failure mode is not the damage of the ribs or the shearing off of the ribs, but is shear failure between the screw thread and the core of the FRP bar, and the sands on the surface of the bar were grinded into powder. The descending branch of load-slip curve for the FRP bars is gentler

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21

Nagata, Ryotaro, Yasuhiro Uetani, Hidetoshi Takagi, Kenji Matsuda, and Susumu Ikeno. "Rheo-Extrusion of A7075 Aluminium Alloy Utilizing Semi-Solid Slurry Manufactured by Simple Method." Materials Science Forum 519-521 (July 2006): 1847–52. http://dx.doi.org/10.4028/www.scientific.net/msf.519-521.1847.

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In order to extrude A7075 aluminum alloy soundly from melt without using feed stock billet, rheo-extrusion was tried by utilizing semi-solid slurry with fine solid granules made by employing cooling tube. When the melt moving down inside thin tube was adequately cooled in different ways and introduced into an extrusion container kept at semi-solid temperature of 873K, structure of solidified slurries were granular and mean grain sizes of about 60 to 120μm could be obtained. Subsequently, these slurries were extruded to round bars at various extrusion ratios (28 to 64) and press ram speed of 10

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22

Naotunna, Chavin N., S. M. Samindi M. K. Samarakoon, and Kjell T. Fosså. "Experimental investigation of crack width variation along the concrete cover depth in reinforced concrete specimens with ribbed bars and smooth bars." Case Studies in Construction Materials 15 (December 2021): e00593. http://dx.doi.org/10.1016/j.cscm.2021.e00593.

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23

Xu, Gang, Jun Zeng, Qing Wang, Xuan Xiang, and Ze-zhong Wei. "Bond Stress-Slip Model for Concrete-Embedded Smooth Bars in Salt-Frozen Environment." IOP Conference Series: Earth and Environmental Science 304 (September 18, 2019): 052081. http://dx.doi.org/10.1088/1755-1315/304/5/052081.

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24

Wang, Xiao Lu, and Da Yu Huang. "Thermal Analysis and Design Applications of the Spiral Groove Tubes in Condensers." Advanced Materials Research 1070-1072 (December 2014): 1705–8. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.1705.

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In this paper, condensation mechanism of the Freon refrigerants outside spiral grooved tube is discussed. The heat transfer coefficient of Freon refrigerants condensation outside spiral grooved tube is obtained. A calculation example of heat transfer coefficient on the tube bundle of condenser with baffle bars is presented. It shows the excellent thermal performance of the spiral groove tubes compared to smooth tubes.

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25

Kinoshita, Masaharu, Charles D. Gilbert, and Aniruddha Das. "Optical Imaging of Contextual Interactions in V1 of the Behaving Monkey." Journal of Neurophysiology 102, no. 3 (2009): 1930–44. http://dx.doi.org/10.1152/jn.90882.2008.

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Interactions in primary visual cortex (V1) between simple visual elements such as short bar segments are believed to underlie our ability to easily integrate contours and segment surfaces. We used intrinsic signal optical imaging in alert fixating macaques to measure the strength and cortical distribution of V1 interactions among collinear bars. A single short bar stimulus produced a broad-peaked hill of activation (the optical point spread) covering multiple orientation hypercolumns in V1. Flanking the bar stimulus with a pair of identical collinear bars led to a strong nonlinear suppression

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26

Lin, Xiao Shan, and Yi Xia Zhang. "Finite Element Analysis of FRP-Reinforced Concrete Beams with Bond-Slip Effect." Applied Mechanics and Materials 553 (May 2014): 661–66. http://dx.doi.org/10.4028/www.scientific.net/amm.553.661.

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In this paper, several FRP-reinforced concrete beams are modelled using a recently developed one-dimensional two-node layered composite beam element which accounts for the bond-slip between reinforcing bars and the surrounding concrete. Effect of different surfaces of FRP reinforcing bars on the structural response of FRP-reinforced concrete beams with bond-slip effect is also investigated. It is found that the type of rebar surface has a significant influence on bond strength and structural behaviour, and that the grain-covered surface provides the best bond between the FRP rebars and concret

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27

Jasiński, Radosław. "NUMERICAL ANALISIS OF THE STRAINS AND STRESS STATES REINFORCED CLAY BRICK MASONRY WALLS HORIZONTALLY SHEARED." International Journal of Engineering Technologies and Management Research 5, no. 8 (2020): 20–37. http://dx.doi.org/10.29121/ijetmr.v5.i8.2018.277.

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This paper presents the results: stress and strain of bed joints mortar, masonry units, reinforcement bars and mechanism of cracking of numerical simulations using ANSYS of reinforced brick wall in the horizontal shear. Willam-Warnke (WW-5) failure criterion for mortar and bricks and Huber-Mises-Hencky (HMH) plasticity surface for bed joints steel reinforcement (steel smooth bars and truss type reinforcement) has been used. Coulomb-Mohr (CM) criterion in the contact surfaces of mortar and bricks have been used in the interface elements. Numerical calculations showed satisfactory convergence of

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Kim, Do Hyung, Jin Won Kim, Yeon Soo Na, and Chi Yong Park. "Investigation of Local Failure Criteria of Wall-Thinned Area by Simulated Specimen Tests." Key Engineering Materials 326-328 (December 2006): 1165–68. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1165.

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The objective of this study is to develop a local failure criterion at wall-thinning defect of piping components. For this purpose, a series of tensile tests was performed using several types of specimens with different stress state under tension, including smooth bars, notched round bars and grooved plates. In addition, finite element (FE) simulations were performed for all tests, and its results were compared to the test results. From the comparisons, the equivalent stress and strain corresponding to maximum load and final failure of the notched round bar specimens were proposed as the local

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Brooker, Jack E., Madeleine K. Bruce, Wendy Chen, et al. "Clinical and Radiological Analysis of Arch Bars Over-Retained for 14 years Post Maxillo-Mandibular Fixation." FACE 2, no. 3 (2021): 300–304. http://dx.doi.org/10.1177/27325016211026336.

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Maxillo-mandibular fixation (MMF) is common technique used in mandibular fractures to stabilize the fragments and maintain the patient in normal dental occlusion during the healing process. Arch bars with elastics are one of the most frequently used methods of MMF and are temporary, and designed to be removed after the healing process is completed. There is controversy as to what impact the hardware has on dental hygiene and oral health. No reports of long-term retention of the hardware exist. This report details the case of arch bars retained for 14 years. The patient underwent MMF and intern

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30

Tang, Fujian, Genda Chen, Richard Brow, and Michael Koenigstein. "Corrosion Resistance of a Sand Particle-Modified Enamel Coating Applied to Smooth Steel Bars." Materials 7, no. 9 (2014): 6632–45. http://dx.doi.org/10.3390/ma7096632.

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31

Bousias, Stathis, Alexis-Loukas Spathis, and Michael N. Fardis. "Seismic Retrofitting of Columns with Lap Spliced Smooth Bars Through FRP or Concrete Jackets." Journal of Earthquake Engineering 11, no. 5 (2007): 653–74. http://dx.doi.org/10.1080/13632460601125714.

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32

Di Sarno, L., C. Del Vecchio, G. Maddaloni, and A. Prota. "Experimental response of an existing RC bridge with smooth bars and preliminary numerical simulations." Engineering Structures 136 (April 2017): 355–68. http://dx.doi.org/10.1016/j.engstruct.2017.01.052.

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33

Verderame, Gerardo M., Paolo Ricci, Gaetano Manfredi, and Edoardo Cosenza. "Ultimate chord rotation of RC columns with smooth bars: some considerations about EC8 prescriptions." Bulletin of Earthquake Engineering 8, no. 6 (2010): 1351–73. http://dx.doi.org/10.1007/s10518-010-9190-x.

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He, Peng, Kang Ling Fang, and Xin Hai Liu. "Improved Watershed Algorithm Based on Morphology and Distance Transform." Applied Mechanics and Materials 333-335 (July 2013): 1071–75. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.1071.

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In this paper we proposed an improved watershed algorithm for the quasi-circle overlapping images of the bars end face. According to the classical watershed algorithm, which often causes over-segmentation, the improved algorithm does a series of pretreatment with the original image, such as sobel filter. With the gradient operator and mathematical morphology method, we firstly obtain the smooth image of the forced local maximum marks. Then, on the basis of the quasi-circle characteristic of the target image, we proceed to maximize the erosion with circular structure in order to prevent under-s

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Li, Xin‐Ru, Zhi‐Min Wu, and Jian‐Jun Zheng. "Dynamic bond stress‐slip model for smooth bars in concrete under transverse tensile‐compressive stresses." Structural Concrete 22, no. 3 (2021): 1633–51. http://dx.doi.org/10.1002/suco.202000579.

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Burr, D. C., M. C. Morrone, and J. Ross. "Compression of Visual Space before Saccades." Perception 26, no. 1_suppl (1997): 100. http://dx.doi.org/10.1068/v970052.

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We studied how the human visual system recalibrates visual coordinates to compensate for saccadic eye movements. Observers made 20 horizontal saccades to a target on an otherwise featureless red screen, and reported the apparent position of a vertical green bar that was briefly displayed before, during, or after the saccade. Bars presented 50 ms before the beginning of the saccade, or after its completion, were perceived accurately and veridically. However, bars presented immediately prior to the saccade were systematically mislocated, either in the direction of the saccade or in the opposite

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Le, Anh-Tuan, Thuy Ninh Nguyen, and Vui Van Cao. "Bond-slip Behaviour of NSM GFRP Bars in Reinforced Recycled-Aggregate Concrete: Experiments and a Modified Model." Civil Engineering Journal 9, no. 2 (2023): 233–53. http://dx.doi.org/10.28991/cej-2023-09-02-01.

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Bond-slip behaviour of glass fiber-reinforced polymer (GFRP) bars embedded in conventional concrete has been widely investigated. In contrast, the bond-slip behaviour of near-surface mounted (NSM) GFRP bars bonded in reinforced recycled aggregate concrete (RAC) seems to be less explored, while recycled materials have been increasingly used due to reasons of environmental pollution and resource exhaustion. This study aimed to experimentally and theoretically examine the bond-slip behaviour of NSM GFRP bars in reinforced RAC under monotonic and cyclic loadings. To achieve this aim, twenty-four t

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Razdobreev, V. G., and D. G. Palamar. "Modern trends in the production of corrosion-resistant and fire-resistant stress-free reinforcing bars." Fundamental and applied problems of ferrous metallurgy, no. 34 (2020): 170–89. http://dx.doi.org/10.52150/2522-9117-2020-34-170-189.

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The aim of this work is to study modern methods of production of corrosion-resistant and fire-resistant stress-free reinforcing bars in the world. Non-stressed reinforcing bars are used as working, structural and assembly reinforcement in conventional building structures, as well as in various types of prestressed structures: from openwork prefabricated to huge monolithic hydraulic structures, therefore, its assortment produced by the domestic metallurgical industry in the range from 5,5 to 40 mm in the nominal diameter of a smooth profile and from 6,0 to 40 mm for a periodic profile. Recently

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39

Gonçalves Júnior, Eliezer Senna, Emílio Alberto Amaral Soares, Sonia Hatsue Tatumi, Marcio Yee, and Juan Carlos Ramirez Mittani. "Pleistocene-Holocene sedimentation of Solimões-Amazon fluvial system between the tributaries Negro and Madeira, Central Amazon." Brazilian Journal of Geology 46, no. 2 (2016): 167–80. http://dx.doi.org/10.1590/2317-4889201620160009.

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ABSTRACT: In the scope of Solimões-Amazon fluvial system between the Negro and Madeira tributaries, three levels of Quaternary fluvial terraces overlie the Alter do Chão and Novo Remanso formations further than 100 km southward its current main channel. Smooth undulated topography presenting low drainages density formed by sparse secondary plain channels and rounded lakes characterizes these deposits. Internally, they show point bars morphology constituted by intercalated layers of mud (silt and clay) and sand forming an inclined heterolithic stratification. The asymmetric distribution of fluv

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40

Toribio, Jesús, Beatriz González, Juan-Carlos Matos, and Iván González. "Notch Effects on the Stress Intensity Factor and on the Fatigue Crack Path for Eccentric Circular Internal Cracks in Elliptically Notched Round Bars under Tensile Loading." Materials 15, no. 24 (2022): 9091. http://dx.doi.org/10.3390/ma15249091.

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In this paper, stress intensity factor (SIF) solutions are numerically obtained for notched bars subjected to tensile loading containing an eccentric circular inner crack located in the cross-section corresponding to the notch root. The finite element method and the J-integral have been used to obtain the SIF and to analyze the effect on it of three elliptical notch geometries (of equal radial depth). The results show how the SIF is greater in the notched bars than in the smooth bar and within the former when the axial semi-axis of the notch rises, its effect being greater as the diameter and

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41

Fiteni, Karl, Joseph Caruana, João A. S. Amarante, Victor P. Debattista, and Leandro Beraldo e Silva. "The relative efficiencies of bars and clumps in driving disc stars to retrograde motion." Monthly Notices of the Royal Astronomical Society 503, no. 1 (2021): 1418–30. http://dx.doi.org/10.1093/mnras/stab619.

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ABSTRACT The presence of stars on retrograde orbits in disc galaxies is usually attributed to accretion events, both via direct accretion, and through the heating of the disc stars. Recent studies have shown that retrograde orbits can also be produced via scattering by dense clumps, which are often present in the early stages of a galaxy’s evolution. However, so far it has been unclear whether other internally driven mechanisms, such as bars, are also capable of driving retrograde motion. Therefore, in this paper, we investigate the efficiencies with which bars and clumps produce retrograde or

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42

Chukwunonye, C. U., Nicholas J. Jones, and Gabriela Petculescu. "Sensitization in Aluminum Alloys: Effect on Acoustic Parameters." Corrosion 74, no. 11 (2018): 1237–44. http://dx.doi.org/10.5006/2832.

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Velocity and attenuation of shear and longitudinal sound waves were measured as a function of sensitization level in AA5083-H116 and AA5456-H116 aluminum alloys using two different techniques: resonant ultrasound spectroscopy (RUS) and pulse echo (PE). The frequency range for RUS was 0.3 MHz to 1 MHz. For PE, longitudinal 3.5 MHz and shear 1 MHz transducers were used. Sensitization was artificially induced in the laboratory by isothermally heating specimens at temperatures of 120°C, 175°C, 185°C, and 240°C for fixed periods of time (12 h to 96 h, the longer times for the lower temperatures). M

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Palios, X., E. Strepelias, N. Stathas, et al. "Experimental study of a three-storey concrete frame structure with smooth bars under cyclic lateral loading." Bulletin of Earthquake Engineering 18, no. 13 (2020): 5859–84. http://dx.doi.org/10.1007/s10518-020-00900-5.

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Sprowl, Tony B., and Dara W. Childs. "A Study of the Effects of Inlet Preswirl on the Dynamic Coefficients of a Straight-Bore Honeycomb Gas Damper Seal." Journal of Engineering for Gas Turbines and Power 129, no. 1 (2004): 220–29. http://dx.doi.org/10.1115/1.2227416.

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Honeycomb seals are frequently used as replacements for labyrinth seals in high-pressure centrifugal compressors to enhance rotordynamic stability. A concern exists that this enhanced stability will be lost if the honeycomb cavities become clogged. Static and dynamic tests were conducted on a honeycomb and a smooth seal (representing the honeycomb seal with completely clogged cells) at the same constant clearances using air with a supply pressure of 70 bars. The test matrix included three speeds, three pressure ratios, and three inlet preswirl conditions. The results show increased leakage, de

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Avelino, Ricardo Maia, Olivier Baverel, and Arthur Lebée. "Design Strategies for Gridshells with Singularities." Journal of the International Association for Shell and Spatial Structures 60, no. 3 (2019): 189–200. http://dx.doi.org/10.20898/j.iass.2019.201.023.

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This article discusses design strategies to improve the mechanical behavior of elastic gridshells with singularities. The advantage of meshing with one or more singularity is to allow a wider range of surfaces to be meshed with equal-length, quadrilateral meshes, known as Chebyshev nets. However, the application of this meshing process will influence the fabrication and the mechanical behavior of the structures. The erection process is simulated by means of the dynamic relaxation method, bending the bars to their final position. This simulation shows that a facetted shape is found instead of a

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Saadoon Al-Yassri, Labeeb, Alaa Mahdi Al-Khekany, and Hajer Satea Abbas. "Experimental Study of Replacement the Tension Reinforcing Bars in Concrete Beams by Steel Pipes." International Journal of Engineering & Technology 7, no. 4.20 (2018): 229. http://dx.doi.org/10.14419/ijet.v7i4.20.25931.

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Structures designed with reinforced concrete beams are used extensively in construction projects because of their functional and economic features. In this research, tested concrete beams were cast and reinforced with small diameter steel pipes and /or steel bars as flexural reinforcement to study the effect of this configuration of reinforcement on the structural behavior of reinforced concrete beams. The idea of this research involves performing and testing of four reinforced concrete beams reinforced by small diameter steel pipes with different percentages of replacement with traditional st

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Li, Xiao Yong, and Zhi Gang Zhang. "The Impact of Corrosion on the Mechanical Properties of Smooth Steel Rebar HPB235." Advanced Materials Research 179-180 (January 2011): 28–31. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.28.

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The Impact of Corrosion on the Mechanical Properties of Smooth Steel Rebar HPB235 The impact of corrosion on the mechanical properties of steel rebar was examined. An experimental investigation was carried out in order to gain better insight of the effect of corrosion on the mass loss, strength, of smooth Steel Rebar HPB235 10 mm diameter steel bars that were artificially corroded for different corrosion levels. Corrosion is a negative contributor on the structural integrity of concrete structures and leads to degradation of the mechanical properties of steel rebar. In order to evaluate the in

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Yang, Xiu Hua. "Frost Damage Mechanism Analysis and Preventive Measures of Bridge." Applied Mechanics and Materials 737 (March 2015): 414–16. http://dx.doi.org/10.4028/www.scientific.net/amm.737.414.

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In order to guarantee the safety and smooth of road traffic in low temperature season, deicing salt is usually adopted to solute the problem of bridge deck snow. However, the frequent use of de-icing salt causes the salt frozen erosion damage of concrete, at the same time, it induces to internal corrosion of steel bars and concrete material performance, furthermore, it will also result in the bridge structure durability degradation, shorten the service life of the bridge. Aiming at this phenomenon, this paper analyzes the mechanism of concrete frost damage, and put forward the corresponding pr

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Brommesson, Rebecka, Magnus Hörnqvist, and Magnus Ekh. "Low-Cycle Fatigue Crack Growth in Ti-6242 at Elevated Temperature." Advanced Materials Research 891-892 (March 2014): 422–27. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.422.

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During low-cycle fatigue test with smooth bars the number of cycles to initiation is commonly defined from a measured relative drop in aximum load. This criterion cannot be directly related to the actual measure of interest - the crack length. By relating data from controlled crack growth tests under low-cycle fatigue conditions of a high strength Titanium alloy at 350°C and numerical simulation of these tests, it is shown that it is possible to determine the relationship between load drop and crack length, provided that care is taken to consider all relevant aspects of the materials stress-st

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Jokūbaitis, Aidas, and Juozas Valivonis. "An Analysis of the Transfer Lengths of Different Types of Prestressed Fiber-Reinforced Polymer Reinforcement." Polymers 14, no. 19 (2022): 3931. http://dx.doi.org/10.3390/polym14193931.

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The main aim of this paper is to provide a broader analysis of the transfer lengths of different types of fiber-reinforced polymers (FRPs) and to provide corrections to the existing theoretical models. Therefore, this paper presents a description of the main factors that influence the transfer lengths of different types of FRPs based on experimental results found in the literature. A database of more than 300 specimens was compiled with the results of the transfer lengths of different FRPs and the main influencing parameters. The analysis of the database results showed that the transfer length

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