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Journal articles on the topic 'Square tube'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Yang, In Young, Kil Sung Lee, Young Nam Kim, Jin Oh Chung, and Cheon Seok Cha. "Axial Crushing Behavior and Energy Absorption Capability of Al/CFRP Square Tubes for Light-Weights." Key Engineering Materials 306-308 (March 2006): 297–302. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.297.

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An aluminum or CFRP (Carbon Fiber Reinforced Plastics) tube is representative light-weight materials but its axial collapse mechamism is different from each other. The aluminum tube absorbs energy by stable plastic deformation, while the CFRP tube absorbs energy by unstable brittle failure with higher specific strength and stiffness than those in the aluminum tube. In an attempt to achieve a synergy effect by combining the two members, aluminum/CFRP square tubes were manufactured, which are composed of aluminum tubes wrapped with CFRP outside aluminum square tubes with different fiber orientat

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2

Selvaraj, P., J. Sarangan, and S. Suresh. "Computational fluid dynamics analysis on heat transfer and friction factor characteristics of a turbulent flow for internally grooved tubes." Thermal Science 17, no. 4 (2013): 1125–37. http://dx.doi.org/10.2298/tsci110404010s.

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The article presents computational fluid dynamics studies on heat transfer, pressure drop, friction factor, Nusselt number and thermal hydraulic performance of a plain tube and tube equipped with the three types of internal grooves (circular, square and trapezoidal).Water was used as the working fluid. Tests were performed for Reynolds number ranges from 5000 to 13500 for plain tube and different geometry inside grooved tubes. The maximum increase of pressure drop was obtained from numerical modeling 74% for circular, 38% for square and 78% for trapezoidal grooved tubes were compared with plai

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3

Ida Bagus Alit and IGNK Yudhyadi. "Simulation of shell and tube type heat exchanger for square geometry using computational fluid dynamics method." World Journal of Advanced Engineering Technology and Sciences 9, no. 2 (2023): 345–50. http://dx.doi.org/10.30574/wjaets.2023.9.2.0242.

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Heat exchangers have various types of design models, one example is the shell and tube type heat exchanger. This tool is useful for raising or lowering the temperature. One of its uses is in the hydroelectric power generation industry, namely as an oil cooler bearing. This study aims to design and simulate a shell and tube type heat exchanger with tube inner diameters of 20 mm and 25 mm and also tube arrangement square and rotated square. From the design results obtained a total length of 1318.59 mm, 300 mm outer diameter of the shell and 320 mm inner diameter of the shell. The simulation resu

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4

Chan, Chunwa, Tao Yu, and Shishun Zhang. "Compressive behaviour of square fibre-reinforced polymer–concrete–steel hybrid multi-tube concrete columns." Advances in Structural Engineering 21, no. 8 (2017): 1162–72. http://dx.doi.org/10.1177/1369433217732499.

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Fibre-reinforced polymer–concrete–steel hybrid multi-tube concrete columns are a new form of columns recently proposed at the University of Wollongong. An multi-tube concrete column consists of an external fibre-reinforced polymer tube and a number of circular internal steel tubes, with the space inside all the tubes filled with concrete. This article presents the first ever experimental study on square multi-tube concrete columns. The experimental program included a total of 14 stub column specimens tested under axial compression, with the test variables being the thickness of the external fi

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Tan, Zhu Hua, Bo Zhang, and Peng Cheng Zhai. "The Effect of Stress Wave on Dynamic Response of Square Thin-Walled Tube." Applied Mechanics and Materials 590 (June 2014): 63–68. http://dx.doi.org/10.4028/www.scientific.net/amm.590.63.

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The effect of stress wave propagation on dynamic response of square tube was investigated by the experimental and numerical simulation methods in the present paper. The square tubes were subjected to the axial impact by split Hopkinson pressure bar. And the deformation process of each square tube was recorded by a high speed camera. Typical dynamic plastic buckling phenomena were observed in the experiments. And the numerical calculation of the experimental load case was conducted to analyze the effect of the stress wave propagation on the initial buckling of the square tube. The results show

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6

Wang, Jian, Hong Tu Sun, and Jing Huang. "Improved Design of Thin-Walled Square Tube for Energy Absorption." Advanced Materials Research 460 (February 2012): 389–92. http://dx.doi.org/10.4028/www.scientific.net/amr.460.389.

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Thin-walled tubes are the main structures to absorb the energy in front impact at the desired controlled collision. A thin-walled square tube is designed by use of a double deck square tube with clapboards which has a stable structure with less Euler deformation in front impact. More deformations of extensional collapse in the double deck square tube with clapboards improve the performance of structures for energy absorption. Induced slots are employed in the square tube to decrease the peak acceleration in front impact. Collision process can be controlled by the slots for the stable deformati

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7

Zhu, Tao, Hongjun Liang, Yiyan Lu, Weijie Li, and Hong Zhang. "Axial behaviour of slender concrete-filled steel tube square columns strengthened with square concrete-filled steel tube jackets." Advances in Structural Engineering 23, no. 6 (2019): 1074–86. http://dx.doi.org/10.1177/1369433219888726.

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This article investigates the behaviour of slender concrete-filled steel tube square columns strengthened by concrete-filled steel tube jacketing. The columns were realised by placing a square outer steel tube around the original slender concrete-filled steel tube column and pouring strengthening concrete into the gap between the inner and outer steel tubes. Three concrete-filled steel tube square columns and seven retrofitted columns ranging from 1200 to 2000 mm were tested to failure under axial compression. The experimental parameters included three length-to-width ( L/ B1) ratios, three wi

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8

Goel, Manmohan Dass, and Laxminarayan Krishnappa. "Deformation and Energy Absorption of Aluminum Foam Filled Square Tubes." Advanced Materials Research 585 (November 2012): 34–38. http://dx.doi.org/10.4028/www.scientific.net/amr.585.34.

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Modeling and numerical simulation of aluminum foam filled square tubes under axial impact loading is presented. The foam-filled thin-walled square tubes are modeled as shell wherein, foam core is modeled by incorporating visco-elastic plastic foam model in Altair® RADIOSS. Deformation and energy absorption studies with single, bi-tubular, and multi-tube structure with and without aluminum foam core are carried out for assessing its effectiveness in crashworthiness under the identical conditions. It is observed that the multi-tube structure with foam core modify the deformation modes considerab

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9

AMER, N., and E. I. GUENDELMAN. "FLUX TUBE SOLUTIONS IN SQUARE ROOT GAUGE THEORY." International Journal of Modern Physics A 15, no. 28 (2000): 4407–15. http://dx.doi.org/10.1142/s0217751x00001397.

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Flux tube solutions are found in the square root gauge theory. Purely magnetic solutions exist which do not contain radiation. It is found that no electric monopole solution exists, which is a sign of electric charge confinement, but magnetic monopole solutions exist and therefore there is no confinement of magnetic charge. There are also solutions which have both electric and magnetic components and represent flux tubes where in addition some radiation process, caused for example by some annihilation in the center of the tube takes place. Finally, there are solutions with both electric and ma

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10

Mohsenizadeh, Saeid, Zaini Ahmad, and Amran Alias. "Numerical Study on Axial Crushing of Auxetic Foam-Filled Square Tube." Materials Science Forum 975 (January 2020): 159–64. http://dx.doi.org/10.4028/www.scientific.net/msf.975.159.

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Filling the thin-walled tubes with a foam core is a typical method to enhance the energy absorption performance and stabilize their crushing responses under impact loading. Recently, auxetic foam material with negative Poisson’s ratio has gained remarkable popularity as an effective candidate to enhance the energy absorption capability of structures. In this paper, polyurethane auxetic foam is suggested as a foam core with the negative Poisson’s ratio of-0.31. Numerical simulation was performed to quantify the crush characteristics of auxetic foam-filled square aluminum tubes for variations in

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11

Desai, Sandeep R., and Rohit V. Kengar. "Experimental analysis of fluid elastic vibrations in rotated square finned tube arrays subjected to water cross flow." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 17 (2019): 6124–34. http://dx.doi.org/10.1177/0954406219861132.

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The majority of the failures of shell and tube heat exchanger tubes are reported due to the flow-induced vibration caused by shell side cross flow. Fluid elastic instability, vortex shedding, and turbulent buffeting are the excitation mechanisms responsible for the failure of the tubes. The failure occurs due to tube-to-tube impacts leading to impaction marks on the tube surface and, subsequently, leading to the failure due to fretting wear and fatigue. The present research work deals with the determination of critical velocity at instability for rotated square finned tube arrays subjected to

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12

Zhu, Xiujie, Chao Xiong, Junhui Yin, Dejun Yin, and Huiyong Deng. "Transverse Bending and Axial Compressing Mechanical Characteristics of Carbon Fiber Reinforced Plastic Sandwich Laminated Square Tubes." Science of Advanced Materials 12, no. 9 (2020): 1289–99. http://dx.doi.org/10.1166/sam.2020.3765.

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The transverse bending and axial compressing mechanical properties of carbon fiber reinforced plastic (CFRP) sandwich laminated square tubes with two kinds of cores, aluminum honeycomb and aluminum foam, respectively, were studied. The failure mechanism and damage processes of the two different CFRP sandwich laminated square tubes were studied by three-point bending and axial compressing experiments, comparing to CFRP hollow laminated square tube. The three-point bending process of CFRP sandwich laminated square tubes were also simulated in ABAQUS/Explicit and the failure mechanism and modes w

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13

Zhou, Zhao Peng, Qin Fang, Fei Li, Xin Hua Zhu, and Yan Mi Wang. "Experimental Study on Cross Section Lateral Compression Energy Absorption Characteristics of Three Types of Steel Tubes." Applied Mechanics and Materials 624 (August 2014): 228–35. http://dx.doi.org/10.4028/www.scientific.net/amm.624.228.

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In order to understand the energy absorption characteristics of various types of steel tubes and provide certain basis for model selection in the engineering application, this paper adopts the experimental study to conduct the comparative study on lateral quasi-static compression energy absorption characteristics of three types of steel tubes, i.e. round steel tube, square steel tube and hexagonal steel tube. Through analysis of the test phenomenon, the total energy absorbed by equal deformation and the energy absorbed per unit mass, the result shows that the steel tube with hexagonal cross se

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14

Eksi, Seçil. "Numerical analysis of bent aluminium sandwich panels with different tubular cores." Materials Testing 64, no. 6 (2022): 851–58. http://dx.doi.org/10.1515/mt-2021-2182.

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Abstract Sandwich panels are frequently used in transportation, automotive, aerospace and marine sectors due to their high rigidity, strength and ability to absorb energy. In this study, finite element analyses investigated the bending behaviour of aluminium sandwich panels fixed at both ends with different geometrical tubular core structures. The sandwich panels consist of 6063-T5 Aluminium core and 7075-T6 Aluminium skin. The core structure used square, circle, triangle, honeycomb, vertical ellipse and horizontal ellipse tube geometries. The square tube-core sandwich panel has the highest sp

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15

Jiang, Xiu Gen, Ning Xu, Xu Dong Shi, Yu Huan Wu, Xing Hua Chen, and Jin San Ju. "Performance of the Casing-Plug Joints of Square Steel Tube Structures." Key Engineering Materials 462-463 (January 2011): 265–70. http://dx.doi.org/10.4028/www.scientific.net/kem.462-463.265.

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The performance of the casing-plug joint, including load carrying capacity, stiffness, failure modes, and its influence factors of the casing tubes set inside and outside of the main tubes are analyzed by simulating square steel tube casing-plug joints structures with ANSYS software in this paper. The formulas of the optimum l/L for the joints with the size of the main tube cross-section 200mm× 200mm are given in this paper.

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16

Liu, Shutian, Xueshan Ding, and Zeqi Tong. "Energy absorption properties of thin-walled square tube with lateral piecewise variable thickness under axial crashing." Engineering Computations 36, no. 8 (2019): 2588–611. http://dx.doi.org/10.1108/ec-10-2018-0492.

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Purpose This paper aims to study the energy absorption properties of the thin-walled square tube with lateral piecewise variable thickness under axial crashing and the influence of the tube parameters on energy absorption. Design/methodology/approach In this work, the energy absorption properties of the thin-walled square tube were analyzed by theoretical, numerical and experimental approach. The numerical results are obtained based on the finite element method. The explicit formulation for predicting the mean crushing force of the tube with lateral piecewise variable thickness was derived bas

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17

Chen, Tsung Chia, and Jiun Ming Ye. "Finite-Element Analysis of the Double Lateral Compression of Clad Tube into a Symmetric Square-Tube." Advanced Materials Research 337 (September 2011): 332–35. http://dx.doi.org/10.4028/www.scientific.net/amr.337.332.

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The squaring process to shape a circular tube into a symmetric square clad tube is examined by a three-dimensional incremental elastic-plastic finite-element method based on an updated Lagrangian formulation. The effects of various parameters, such as geometric ratio R/t, strain hardening exponent n, friction coefficient μ, and the length of tube L, on the occurrence of collapse in the squaring process are discussed and interpreted in a theoretical manner. The findings show that geometric ratio is the major factor in the process of squaring circular tubes. When R/t=25, serious collapse is like

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18

Alsuhaibani, Zeyad, Mohamed Ali, and Nader S. Saleh. "Center-to-Center Distance’s Effect between Vertical Square Tubes of a Horizontal Array on Natural Convection Heat Transfer." Applied Sciences 13, no. 10 (2023): 6345. http://dx.doi.org/10.3390/app13106345.

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An experimental study on natural convection heat transfer from the outer surface of a horizontal array of vertical square tubes in the air is investigated. The array consists of three vertical square tubes at equally different center-to-center distances. Each tube has a square cross-section with a side length of 2.00 cm, 100 cm length, and is filled with sand. Each tube is heated by inserting an internal heating element with a constant heat flux at the center. Five center-to-center separation distance to hydraulic diameter ratios (S/D) are used at different heat flux ranges of 70–360 W/m2. Res

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19

Ji, Chong, Yang Yu, You Zhou, Fuyin Gao, Xingbo Xie, and Jianyu Wu. "Experimental Investigation on the Deformation and Fracture of Steel Square Tubes under Double-Explosion Loadings." Shock and Vibration 2018 (November 1, 2018): 1–15. http://dx.doi.org/10.1155/2018/1074340.

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The experimental investigations on the square tubes with various stand-off distances and wall thickness were helpful to understand the dynamic response of metal shell under single and double explosion. Therefore, the effect of stand-off distance, wall thickness, and amounts of explosion on the deformation and damage of the square tubes and the regular pattern of the fracture development was analyzed by dimensions of local plastic deformation, volume of the depression area, and crack type. The result reveals that the deformation and fracture mode of steel square tubes gradually transform from l

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20

Zhang, YT, B. Shan, and Y. Xiao. "Axial impact behaviors of stub concrete-filled square steel tubes." Advances in Structural Engineering 22, no. 11 (2019): 2490–503. http://dx.doi.org/10.1177/1369433219845094.

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Existing research on the widely used concrete-filled steel tubes is mainly focused on static or cyclic loading, and the studies on effects of high strain rate are relatively rare. In this article, seven stub concrete-filled steel tubular columns with square section were tested under both static and impact loads, using a large-capacity drop-weight testing machine. The research parameters were variable height of the drop-weight and different load types. The experimental results show that the failure modes of the concrete-filled steel tube columns from the impact tests are similar with those unde

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21

Zhou, Chun Li, Ru Yang, and Xue Ying Tang. "Finite Element Analysis of Prestressed Concrete-Filled Square Steel Tube Truss." Advanced Materials Research 838-841 (November 2013): 510–13. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.510.

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Prestressed concrete-filled square steel tube truss is the kind of truss whose upper chords and lower chords are respectively concrete-filled square steel tube and prestressed square steel tube. Four truss models as square steel tube truss, concrete-filled square steel tube truss, prestressed square steel tube truss and prestressed concrete-filled square steel tube truss were analysed by ANSYS, each of those truss models’ span has three variations. The result shows that the bar sections’ strength of square steel tube truss and concrete-filled square steel tube truss are far from reaching their

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22

Zhou, Xiwu, Jingdong Liu, Weifeng Rong, and Benying Wu. "Axial Crushing Theory and Optimization of Lattice-Filled Multicellular Square Tubes." Materials 17, no. 6 (2024): 1245. http://dx.doi.org/10.3390/ma17061245.

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A lattice-filled multicellular square tube features a regular cross-sectional shape, good energy consumption, and good crashworthiness, which is suitable for the design of energy absorbers in various protection fields such as automobiles, aerospace, bridges, etc. Based on the super folding theory, two reference planes are set to refine the energy consumption zone of the super folding element in this study. The energy consumption calculation of convex panel stretching is involved, and the critical crushing force formula is introduced in this study. Meanwhile, the calculation method from a singl

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23

Louk Fanggi, Butje Alfonsius, and Togay Ozbakkloglu. "Effect of Inner Steel Tube Cross-Sectional Shape on Compressive Behavior of Square FRP-Concrete-Steel Double-Skin Tubular Columns." Applied Mechanics and Materials 752-753 (April 2015): 578–83. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.578.

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Recently, a new type of composite system was proposed in the form of fibre reinforced polymer (FRP)-concrete-steel double-skin tubular columns (DSTCs). The performance of this column system, which consists of an outer tube made of FRP and an inner tube made of steel, has been experimentally investigated in a number of studies. However, apart from a single study reported on square DSTCs, all of the existing studies have been concerned with DSTCs with circular external tubes. This paper reports on part of an ongoing experimental program at the University of Adelaide that was aimed at addressing

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24

Elchalakani, Mohamed, Minhao Dong, and Ali Karrech. "Interaction Diagram of Rubberised Concrete Filled Square Hollow Sections." Journal of Civil Engineering and Construction 8, no. 2 (2019): 55–62. http://dx.doi.org/10.32732/jcec.2019.8.2.55.

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Rubberised concrete utilises waste material, prevents resource extraction and improves concrete ductility, however at the cost of reduced strength and stiffness. The performance of thirty rubberised concrete-filled single-skin steel tubes under combined loading conditions were systematically investigated and comparisons against six steel hollow tubular columns and beams were made. The experimental program consisted of three rubber replacement ratios, 0%, 15% and 30%, three load eccentricities and four tube sections with section slenderness (b/t, width/thickness) of 18 to 50. The results showed

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Yang, Tingting, Wensong Zhou, and Lei Yu. "Guided Wave-Based Damage Detection of Square Steel Tubes Utilizing Structure Symmetry." Symmetry 15, no. 4 (2023): 805. http://dx.doi.org/10.3390/sym15040805.

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Square steel tube, which is widely used in civil engineering, can suffer from a wide variety of damages and aging defects, thus its nondestructive testing (NDT) has attracted wide attention. This work proposes an ultrasonic guided wave (UGW)-based damage detection method for square steel tubes using structure symmetry. Firstly, the dispersion characteristics of square steel tubes are obtained using the semi-analytical finite element (SAFE) method, after which the optimal guided wave modes for damage located on the long and short edges of the steel tube are selected by modal analysis. Then, usi

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Zou, Wanjie, Jiongfeng Liang, Guangwu Zhang, and Haifeng Yang. "Bond Properties of RAC-Filled Square Steel Tubes after High Temperature." Advances in Materials Science and Engineering 2019 (November 29, 2019): 1–9. http://dx.doi.org/10.1155/2019/2413613.

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This paper presents the results of an experimental study to investigate the influence of high temperatures on the bond properties between the recycled coarse aggregate (RCA) concrete and square steel tubes. A total of 27 pushout recycled aggregate concrete- (RAC-) filled square steel tube specimens are cast and heated under five different temperatures (20°C, 200°C, 400°C, 600°C, and 800°C) for testing. The main parameters considered in the test are temperature, exposure time of heating, RCA replacement ratio, interface length-to-width ratio, and concrete strength. The experimental results indi

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Zeng, Lan, Xuqi Liang, Ziyong Mo, and Hong Yuan. "Compressive Behavior of PET FRP-confined Concrete-filled Square Steel Tube with Seawater Sea-Sand Concrete Core." Journal of Physics: Conference Series 3015, no. 1 (2025): 012015. https://doi.org/10.1088/1742-6596/3015/1/012015.

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Abstract Seawater sea-sand concrete (SSC) instead of ordinary concrete have attracted increasing attention in marine engineering for sustainable development. Fiber-reinforced polymer (FRP)-confined SSC can enhance its mechanical behavior, but the confinement effectiveness and ductility are insufficient for square columns. Concrete-filled square steel tube with circular FRP-confined concrete core (SCFC) members have shown favourable structural performance, but early buckling of the outer steel tube causes the sandwich concrete to fracture prematurely. In such cases, external FRP confinement may

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Malawat, M., Jos Istiyanto, and D. A. Sumarsono. "Effects of Wall Thickness and Crush Initiators Position under Experimental Drop Test on Square Tubes." Applied Mechanics and Materials 865 (June 2017): 612–18. http://dx.doi.org/10.4028/www.scientific.net/amm.865.612.

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Crush initiators are the weakest points to reduce initial peak load force with significant energy absorption ability. The objective of this paper is to study the effects of square tube thickness and crush initiators position for impact energy absorber (IEA) performance on thin-walled square tubes. Two square tubes having thickness about 0.6 mm (specimen code A) and 1 mm (specimen Code C) were tested under dynamic load. The crushing initiator is designed around the shape of the tube wall and has eight holes with a fixed diameter of 6.5 mm. In the experiment, the crushing initiator was determine

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Hou, Ji-Xuan. "Determine Mesh Size through Monomer Mean-Square Displacement." Polymers 11, no. 9 (2019): 1405. http://dx.doi.org/10.3390/polym11091405.

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A dynamic method to determine the main parameter of the tube theory through monomer mean-square displacement is discussed in this paper. The tube step length can be measured from the intersection of the slope- 1 2 line and the slope- 1 4 line in log-log plot, and the tube diameter can be obtained by recording the time at which g 1 data start to leave the slope- 1 2 regime. According to recent simulation data, the ratio of the tube step length to the tube diameter was found to be about 2 for different entangled polymer systems. Since measuring the tube diameter does not require g 1 data to reac

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Kurnia, Jundika Candra, and Agus Pulung Sasmito. "Numerical Evaluation of Heat Transfer and Entropy Generation of Helical Tubes with Various Cross-sections under Constant Heat Flux Condition." MATEC Web of Conferences 225 (2018): 03017. http://dx.doi.org/10.1051/matecconf/201822503017.

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The presence of curvature-induced secondary flow in helical pipe which create complex transport phenomena and higher transfer rate has attracted significant attention from both academic and industry. Flow behavior and transport processes in helical tube have been intensively investigated. Nevertheless, most studies were focused on the performance based on first law of thermodynamics with limited studies concerning the performance based on second law of thermodynamics. The objective of this study is to investigate the heat transfer performance of helical tube according to both first and second

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Yu, Tian, Jiajia Zhou, and Masao Doi. "Capillary imbibition in a square tube." Soft Matter 14, no. 45 (2018): 9263–70. http://dx.doi.org/10.1039/c8sm01494a.

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SAHRANE, Sara, and Slimane NIOU. "CFD Investigation of Shell and Tube Heat Exchanger: Impact of Various Tube Bundle Combinations on Heat Transfer Coefficient and Pressure Drop." Eurasia Proceedings of Science Technology Engineering and Mathematics 26 (December 30, 2023): 225–33. http://dx.doi.org/10.55549/epstem.1409489.

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Shell and tube heat exchangers play a crucial role in various industries, including chemical processing, oil and gas, power generation, and HVAC systems. These exchangers are widely used for transferring heat between two fluids while maintaining their separation. The design of a shell and tube heat exchanger consists of a bundle of tubes enclosed within a larger shell. The hot fluid flows through the tubes, while the cold fluid circulates around them in the shell, facilitating efficient heat transfer and pressure drop of the system. The performance of a shell and tube heat exchanger is influen

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Wang, Shan Gang, Pei Yan Zhan, and Hai Bin Xu. "Control System Research of Square Steel Tube Straightening Machine." Applied Mechanics and Materials 670-671 (October 2014): 1337–41. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.1337.

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The article expounds the square steel tube straightening machine which is given priority to with PLC (Siemens S7-200) of the control system use testing car`s sensor to test square steel tube`s bending. Then, according to the curve`s size and location of the peaks and troughs of the curvature degree of square steel tube straightening machine control correct device again find square steel tube`s position of the peaks and troughs, and the peaks and troughs in the use of hydraulic cylinder for the opposite direction of compression. The hydraulic cylinder travel sizes are set to peak and trough val

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Ahmed, Naveed, Pu Xue, and Naeem Zafar. "Dynamic axial crushing of bitubular tubes with curvy polygonal inner-tube sections." International Journal of Computational Materials Science and Engineering 06, no. 03 (2017): 1750024. http://dx.doi.org/10.1142/s2047684117500245.

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Bitubular structural configurations, where the outer tube is circular, square and curvy square in shape while the inner-tube section is curvy triangular, square and hexagonal in different proposed configurations, are numerically crushed under dynamic axial loading. The crashworthiness effectiveness for changing inner-tube polygonal cross-section for each of the outer tube sections is studied and compared with changing outer tube shape. The deformation plots and energy absorption (EA) parameters such as peak crushing force (PCF) mean crushing force (MCF), energy absorption and crush force effic

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Prasetiyo, A. B., K. A. Sekarjati, and Sutrisna. "Numerical analysis of the influence iron type on Von Mises Stress and safety parameters for compost processing machine frame construction." IOP Conference Series: Earth and Environmental Science 1151, no. 1 (2023): 012058. http://dx.doi.org/10.1088/1755-1315/1151/1/012058.

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Abstract The installation of other engine parts, such as the engine, transmission, shaft, blade, and cover, includes the engine frame. The engine frame must be developed and constructed with the strength to support other components. The building of the waste processing machine frame with variants of square tube type and angle bar type will be analyzed in this study, with a focus on the analysis of von Mises’s stress and safety aspects. Using Solidworks software, finite element analysis is the research methodology used. The examination of the waste processing machine’s frame modelling using squ

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Ding, Min, Zhen Hua Hou, Xiu Gen Jiang, Yu Zhi He, Guang Kui Zhang, and Jin San Ju. "Numerical Simulation Studies on Flexural Behavior of Casing Joint of Square Steel Tube." Advanced Materials Research 156-157 (October 2010): 1564–67. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.1564.

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The numerical simulation studies on flexural behavior of casing joint of square steel tube were carried out by using finite element analysis software ANSYS/LS-DYNA with consideration of geometric nonlinearity, material nonlinearity and contact nonlinearity. On this basis, the effects of tube wall thickness, tube edge length, and inserting depth on failure mode, ultimate flexural capacity and deformation of casing joint of square steel tube was discussed. The results show that there are two types of failure modes, i.e., inside tube yield failure and outside tube shear failure, when the joints a

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Tan, Chin Joo. "End Formation of a Round Tube into a Square Section with Reduced Forming Loads." Applied Mechanics and Materials 395-396 (September 2013): 945–48. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.945.

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Low formation loads are desirable in metal stamping industries as it reduces the press capacity of the machine and the tooling cost. In the previous study, the author had successfully developed a 2-stage end formation process of a round tube into a square section having small corner radii. However, the formation load in this process increased linearly with the punch stroke in the 1st stage due to the continuous expansion of the tube end by the conical die. Hence, buckling and cracks occurred at the circular section and the bottom end of the square section respectively when the punch stroke was

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YANG, Kun, Yunjie SHA, and Tao YU. "Research on Three-point Bending Mechanical Performance of Square Tube Structure Filled with Foam Aluminum." Mechanics 27, no. 6 (2021): 442–50. http://dx.doi.org/10.5755/j02.mech.28613.

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In this paper, the quasi-static three-point bending experiments are carried out to study the deformation behavior of square tube and square tube filled with foam aluminum. The difference of bending deformation mode, loading characteristics and energy absorption efficiency between tube and foam aluminum filled tube is compared. And the influence of adhesive between the foam aluminum core and the tube wall on the bending deformation of square tube filled with foam aluminum is analyzed. Based on the bending super beam element model of tube structure, the relationship between the moment and rotati

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Zhou, Junxian, Chuang Dong, Bingzhi Chen, and Xu Niu. "Design and Numerical Simulation of Pyramidal Prefolded Patterned Thin-Walled Tubes." Advances in Materials Science and Engineering 2021 (January 18, 2021): 1–16. http://dx.doi.org/10.1155/2021/6614381.

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An improved pyramidal prefolded pattern was designed and applied to thin-walled tubes. This delicately designed pattern modularizes the tube to control the folding process and act as an inducer to trigger deformation modes with outstanding crushing performance. Dynamic crushing tests were conducted numerically; the simulation results reveal that the patterned square tube developed a deformation mode with shorter wavelength, better load consistencies, and higher energy-absorption efficiency (up to 29%) than that of the traditional counterpart. Moreover, geometric analysis was performed and stru

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Akbarshahi, H., Mojtaba Sadighi, Morteza Shakeri, and M. Mirzaei. "Mathematical Model for Axial Crushing of Hybrid Square Tubes." Key Engineering Materials 471-472 (February 2011): 664–69. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.664.

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In this paper, to investigate energy absorption capability of hybrid (metal-composite) square tubes under axial loading, a new theory is proposed based on collapse mode of metal square tubes and considering off-axis strength of each layer of composite. An expression is derived for mean crushing load and folding wave length in terms of mechanical properties and geometrical dimensions of metal tube and composite prepregs wrapped around it. To validate the theoretical model, predicted values for mean crushing load are compared with experimental and numerical results that show reasonably good agre

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Gai, Xiao-Ling, Ze-Nong Cai, Xian-Hui Li, et al. "Experimental study on sound absorption performance of microporous aluminum square tube space absorber." Noise Control Engineering Journal 71, no. 2 (2023): 101–8. http://dx.doi.org/10.3397/1/37719.

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The aluminum square tube is one of the ceiling materials that have been produced in recent years. It has become the most popular product in the decoration market because its lines are bright and clean with distinct layers, reflecting the simple modern style, and it is easy to install and dismantle. However, the aluminum square tube used in the market is mostly a single aluminum panel structure, mainly used for decoration, without sound absorption and noise reduction. In order to improve the sound absorption properties of the aluminum square tube, a microporous aluminum square tube space absorb

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Khalid, Asad A. "Failure Mechanism and Energy Absorption of Foam Filled Hybrid Aluminum-Glass/Epoxy Tubes under Three-Point Bending." Key Engineering Materials 888 (June 9, 2021): 43–48. http://dx.doi.org/10.4028/www.scientific.net/kem.888.43.

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Experimental work has been performed on the behaviour of glass/epoxy, aluminum, and aluminum-glass/epoxy empty and polyurethane foam filled tubes subjected to three-point bending. Tubes were of circular and square cross section area. Hand layup method was used to fabricate the tubes. Each tube is made of six layers. Inner diameter and total length of the tubes were 50 mm and 250 mm respectively. Bending load-displacement response, crush force efficiency, and absorbed energy were drawn and discussed. Effect of foam filler, material of the tube and stacking sequence on the maximum bending load w

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Li, S., and S. R. Reid. "Relationship Between the Elastic Buckling of Square Tubes and Rectangular Plates." Journal of Applied Mechanics 57, no. 4 (1990): 969–73. http://dx.doi.org/10.1115/1.2897669.

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The buckling behavior of axially compressed square tubes is investigated by introducing realistic edge conditions for the panels which correspond to symmetry or antisymmetry in the modes of deformation of the tube cross-section with regard to the diagonals of the section. The results show a number of differences between the buckling behavior of square tubes and of simply-supported plates. This vanishes only for very thin tubes and plates. The comparison between the buckling mode for thinner and thicker tubes suggests an explanation for the existence of compact and noncompact crushing modes in

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Tian, Penggang, Zhenshan Wang, Kai Wang, Jianhui Niu, Zhixun Xie, and Kangning Liu. "Analysis of the Bearing Capacity of Concrete-Filled Thin-Walled Square Steel Tubes with Helical Stiffening Based on Local Buckling." Buildings 14, no. 7 (2024): 2122. http://dx.doi.org/10.3390/buildings14072122.

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To address the issue of local buckling in thin-walled steel tube concrete columns, a form of helical stiffening ribs was proposed. Axial compression tests were conducted on five sections of square steel tube concrete column specimens. The research revealed that, compared to ordinary steel tube concrete columns, the axial compression bearing capacity and deformation capacity of steel tube concrete columns with helical rib constraints increased by 18.5% and 7.7%, respectively. The helical ribs effectively enhanced the buckling resistance of the thin-walled steel tube concrete components. The fai

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Wang, Kun, Zhiyu Zhu, Huihui Luo, and Ahmed Ahmad Omar. "Analysis on Flexural Capacity of Square Steel Tube Truss Concrete Beams with Grouted Chords." Advances in Materials Science and Engineering 2021 (February 11, 2021): 1–13. http://dx.doi.org/10.1155/2021/6694291.

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In this research paper, simulations on five specimens of square steel tube truss concrete beams with grouted chords were conducted by finite element analysis (FEA) software ABAQUS. Comparison of failure modes, vertical load-deflection curves, and steel tube strain variation with tests was done. The rationality and validity of the FEA models were also verified. On this basis, parameter analysis was carried out, and the influence of concrete strength, steel ratio of upper and lower chords, and spacing of steel tube truss joints on the vertical load-deflection curves were obtained. From the resul

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Gu, Liquan, Yonghui Wang, and Ximei Zhai. "Behaviour of a Sacrificial Cladding with Foam Concrete-Filled Square Tubes under Impact Loads." Buildings 13, no. 7 (2023): 1774. http://dx.doi.org/10.3390/buildings13071774.

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In this paper, a new sacrificial cladding with foam concrete-filled square tubes (FCFST sacrificial cladding) was developed for dissipating impact energy. The impact experiment was conducted on the FCFST sacrificial claddings using a drop hammer impact experiment system, and the finite element simulation analysis was performed using the explicit nonlinear program LS-DYNA. The deformation modes, force–displacement responses and energy absorption performances of the FCFST sacrificial claddings were discussed. The results indicated that the impact responses of the FCFST sacrificial cladding could

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Caputo, Francesco, Giuseppe Lamanna, and Alessandro Soprano. "Energy Absorption Capabilities of a Square Tube System." Key Engineering Materials 488-489 (September 2011): 561–64. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.561.

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In the present paper the authors refer about a series of experimental tests, where an aluminium alloy square tube, filled with an aluminium foam, was crushed by a longitudinal load at a speed of 10 m/s. The test apparatus consisted of a sled installed on a very stiff frame moving on appropriate guides, as the specimen was set on a home-made fixture. Two arrangements of square tubes were considered as specimens: a “standard” one and an “optimized” one. Both crushing behaviours and energy absorption capabilities were analyzed experimentally and numerically simulated by means of the explicit FE c

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M.W. Falah, Zainab Al-Khafaji, R. Yaseen, D.F. Yousif, K.A. Hamza, and S.S. Radhi. "Finite Element Simulations of the CFRP Retrofitted Hollow Square Columns." Electronic Journal of Structural Engineering 22, no. 01 (2022): 1–13. http://dx.doi.org/10.56748/ejse.2229701.

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ABSTRACT This article describes the finite element analysis of concrete columns with a hollow square reinforced which restricted with a square Carbon-Fiber-Reinforced polymer (CFRP) tube. In this study, about sixteen square hollow core columns were investigated. These columns were classified into four sets. The set number one was the reference set which involved four unconfined reinforced columns with traditional steel helices and longitudinal steel bars. The columns of the 2nd category have a similar configuration as the set number one except that these columns were restricted outwardly by th

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Mohamed Ali, Jaffar S., Kassim A. Abdullah, and Yulfian Aminanda. "Effect of Cross Sectional Shape on the Energy Absorbing Characteristics of a Tube under Quasi-Static Loading." Applied Mechanics and Materials 315 (April 2013): 334–38. http://dx.doi.org/10.4028/www.scientific.net/amm.315.334.

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In this study, numerical simulation of tubes of various cross section under axial compression is carried out using LS-DYNA. The effect of varying configurations of tube cross-section shape on the deformation response, collapse mode and energy absorption characteristics of tubes under quasi-static axial compression have been studied. The validation of the finite element tube model was made by comparison with the experimental results of the square tube subjected to quasi-static axial compression. Tabulated results are presented and plots have been included for the specific energy absorption for

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Manigandan, R., and Manoj Kumar. "Effect of Debonding on Axial Response of Concrete Filled Steel Tubular Columns." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (2022): 95–104. http://dx.doi.org/10.38208/acp.v1.479.

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The axial strength and ductility of concrete filled steel tubes is significantly improved due to two major factors namely, firstly due to confining effect provided by steel tube, and secondly due to the synergistic interaction between steel tube and concrete core. Sometimes, the contact between concrete core and steel tube is vanished and debonding between concrete core and steel tube (normal referred as gap) occurs owing to various reasons such as improper compaction, shrinkage in concrete, lack of curing of encased concrete, and due to non-uniform distribution of load at column top. Due to o

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