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1

Liu, Xue Jiang, Hai Sheng Liu, Jing Liu, and Hui Gang Wang. "Numerical Simulation of Plate Bender Bending Process." Advanced Materials Research 189-193 (February 2011): 2228–32. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.2228.

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The plate’s mechanical behavior of three-roller plate bending machine had been analyzed in case of upper roller feeding based on ANSYS. Strain and stress distribution of the plate and its changes are gained. The influence of upper roller’s feeding location and bending velocity to bending process are researched. The results are valuable to bending process optimization and practical technique of plate bending.
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2

Ridane, N., D. Jaksic, Matthias Kleiner, and B. Heller. "Enhanced Semi-Analytical Process Simulation of Air Bending." Advanced Materials Research 6-8 (May 2005): 729–36. http://dx.doi.org/10.4028/www.scientific.net/amr.6-8.729.

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The air bending process is one of the most widely used process for the manufacturing of sheet metal bending parts made of thin as well as of thick sheet metal. Although the air bending process offers a very high production potential due to its great flexibility, it is associated with certain problems which can negatively influence the shape and dimensional accuracy of the bending parts. Examples for such negative influences are the springback of the material, the batch variations, or the deflections of the bending machine and tools. These differences have to be considered either in the determi
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3

Zhang, Jian, Tong Mei Xiao, Liang Chu, and Da Sen Bi. "Velocity Optimization on Squashing and Bending Process of Large Diameter Elbow." Advanced Materials Research 194-196 (February 2011): 2204–8. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.2204.

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FEM simulations of squashing and bending process of large diameter elbow was applied to analyze the influence of squashing velocities, one of the key process parameters, on the deformation of the tube. In this study the squashing distance of first step is 300mm after several simulation attempts, corresponding to different squashing speeds and different bending velocities of second step. The simulation results of different velocities are compared and discussed. In the end the final velocities of the two steps are given.
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4

Lamanna, Giuseppe, Francesco Caputo, Luigi Grassia, Alberto D'Amore, and Alessandro Soprano. "Numerical Simulation of a Stretch Bending Process." Key Engineering Materials 417-418 (October 2009): 637–40. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.637.

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There are several difficulties associated with the numerical simulation of the stretch bending process of extruded components; the main ones are non-linear material behavior, geometrical non-linearities, modeling of boundary conditions, contact between die and specimen, springback during the unloading phase. Another very complex aspect is the calibration of the numerical model, as rather few experimental results are generally available. This paper deals with a numerical simulation of a complete stretch bending process with the aim to select the most suitable numerical procedure oriented to the
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5

Zhang, Xinju, Deshun Su, Jianwei Jin, et al. "Numerical Simulation on Optimization of Process Parameters for Free Bending of Metal Tubes." Mathematical Problems in Engineering 2022 (November 3, 2022): 1–15. http://dx.doi.org/10.1155/2022/4173457.

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Three-dimensional free bending is a new tube forming technology with continuous variable curvature. In order to improve the forming quality of tube, this paper studies the principle of three-dimensional free forming system and the numerical calculation of bending moment in detail, and it uses the finite element simulation to model the mechanism in the bending process. The simulation model is used to simulate the forming process of copper tube, and the influence of key process parameters on the forming process is analyzed,the shape of the inner cavity of the bending die and the gap between the
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6

Yang, Tung Sheng, Jen Chuan Yeh, and Sheng Yi Chang. "Application of FEM Simulation and Abductive Network to Predict the Springback of U-Shaped Bending Process with Counter Force." Advanced Materials Research 579 (October 2012): 32–41. http://dx.doi.org/10.4028/www.scientific.net/amr.579.32.

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This study applies the finite element method (FEM) in con-junction with an abductive network to predict springback’s angle during the U-shaped bending process with counter force. To verify the prediction of FEM simulation for springback, the experimental data are compared with the results of current simulation. Bending force, effective stress distribution and springback are investigated for different process parameters, such as profile radius of die, blank holder force and counter force of U-shaped bending process, by finite element analysis. The abductive network is then utilized to synthesiz
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7

Sun, Zhen Zhong, Sheng Gui Chen, and Ye Jing. "Numerical Simulation of Push-Bending Process of Aluminum Section Profile." Advanced Materials Research 97-101 (March 2010): 90–95. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.90.

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The aluminum profile can be formed into a complicated part such as 360º abnormity section circle parts that is difficult to be manufactured by other techniques. A new bending method was proposed for bending process. The push-bending principle, deformation procedure, curvature spring-back, section distortion and wrinkling are studied numerically. All cross-sections for the profile are provided a rather homogenous deformation degree. The curvature value of component and the distortion of section keep high consistence in push-bending process. The wrinkling tendency is reduced with increasing rela
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8

Ren, Sheng Le, Yi Nan Lai, Guang Fei Wu, Jun Tao Gu, and Zeng Lou Li. "Intelligent Prediction of Process Parameters for Cold Bending." Advanced Materials Research 154-155 (October 2010): 74–78. http://dx.doi.org/10.4028/www.scientific.net/amr.154-155.74.

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The choice of the process parameters in the conventional tube bending forming is often based on experience. The method of constantly testing to adjust has seriously affected the production efficiency and increased production costs. In this paper, an intelligent prediction model of the tube bending forming process parameters for utility boiler was set up based on neural network, which has been used to predict the main process parameters including the bending moment and boost power. In the intelligent prediction model, the analytical calculations, numerical simulation and experimental data are s
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9

Yang, Ming, and Susumu Shima. "Simulation of pyramid type three-roll bending process." International Journal of Mechanical Sciences 30, no. 12 (1988): 877–86. http://dx.doi.org/10.1016/0020-7403(88)90071-9.

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10

Leacock, Alan G., David McCracken, Desmond Brown, and Robert McMurray. "Numerical Simulation of the Four Roll Bending Process." Materials and Manufacturing Processes 27, no. 4 (2012): 370–76. http://dx.doi.org/10.1080/10426914.2011.560228.

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11

Guan, Yanjin, Guiping Yuan, Sheng Sun, and Guoqun Zhao. "Process simulation and optimization of laser tube bending." International Journal of Advanced Manufacturing Technology 65, no. 1-4 (2012): 333–42. http://dx.doi.org/10.1007/s00170-012-4172-6.

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12

Arola, Anna Maija, Antti J. Kaijalainen, and Vili Kesti. "Evaluation of Bendability of Hot-Rolled S960 Grade Steel Using Optical Strain Measurements and FE-Modelling." Key Engineering Materials 651-653 (July 2015): 610–16. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.610.

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Bending is an important forming process for ultra-high strength steel (UHSS) because it is cost-effective, fast and in many cases it can be used to replace welding in a part manufacturing processes. One major challenge in air bending of UHSS is to predict the limits for bendability since the traditional methods for failure prediction, such as forming limit diagram (FLD), cannot generally be applied to bending process. In this paper, 3D FE-modelling coupled with a CDM-damage model is used to simulate the air bending process and to determine the bendability limits for a hot-rolled 960MPa grade.
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13

Chen, Ming He, Lin Gao, H. H. Mao, Dun Wen Zuo, and Min Wang. "Numerical Simulation of Stretch Bending Process and Springback for T Section Aluminum Extrusions." Key Engineering Materials 315-316 (July 2006): 416–20. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.416.

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In order to improve the forming precision of the stretch bending process for T section aluminum extrusions and meet the fine forming requirement of the aerostat blank parts, the elongation controlled stretch bending process finite element model is proposed, which is based on the basic principle of the stretch bending forming with respect to A-7B CNC Section Stretch Wrap Forming Machine by analyzing various factors that influence the qualities of stretch bending parts, and the numerical simulation of the stretch bending process and spring back for T section aluminum extrusions is carried out. T
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14

Malikov, V., Ralf Ossenbrink, B. Viehweger, and Vesselin Michailov. "Analytical and Numerical Calculation of the Force and Power Requirements for Air Bending of Structured Sheet Metals." Key Engineering Materials 473 (March 2011): 602–9. http://dx.doi.org/10.4028/www.scientific.net/kem.473.602.

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Structured sheet metals with regular bumps offer higher stiffness compared to smooth sheet metals. They can be produced by a hydroforming process. The application of the structured sheet metals, however, is inhibited by the lack of knowledge for the subsequent processing steps. In this paper, the force and power requirements for air bending of structured sheet metals are calculated with a Finite Element Simulation (FE) and an analytical approach. In the first step, the hydroforming manufacturing process of the structured sheet metals is simulated in order to predict the exact geometry and the
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15

Huang, Hua Gui, Xiao Kai Liu, and Zhan Zhe Zhang. "Elastic-Plastic Finite Element Analysis on Steel Pipe Rotary-Draw Bending Process." Applied Mechanics and Materials 101-102 (September 2011): 547–50. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.547.

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With non-linear elastic-plastic finite element method, the numerical simulation of the steel pipe rotary-drawing bending process is carried out, and the forming mechanism and spring-back phenomenon of rotary-draw bending is analyzed. Aiming at the phenomenon of pipe collapse deformation, a mandrel is used and it makes the bending process. The simulation results show that using mandrel could avoid collapse appearing in deformation area, reducing contact friction coefficient will help to improve wall thickness uniformity, and increasing the angle of rotary-draw bending will aggravate the amount
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16

Yang, Tung Sheng, and Huai Shiun Lu. "Predictions of Springback of Strain-Hardening Material in U-Shaped Bending Process." Key Engineering Materials 419-420 (October 2009): 481–84. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.481.

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This study applies the finite element method (FEM) in conjunction with an abductive network to predict springback of different strain-hardening material in U-shaped bending process.Springback is investigated for different material parameters, such as strength coefficient of material, strain-hardening exponent and Young’s modulus, by finite element analysis during U-shaped bending process. The abductive network is then applied to synthesize the data sets obtained from the numerical simulations. Prediction results of the springback of different strain-hardening material in U-shaped bending proce
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17

Jepkens, Jan, Philipp Müller, Hendrik Wester, Sven Hübner, Simon Wehrmann, and Bernd-Arno Behrens. "Simulation and Validation of an Incremental Bending Process for Cylindrical Fuselage Components." Aerospace 11, no. 1 (2023): 14. http://dx.doi.org/10.3390/aerospace11010014.

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In the aviation industry, a large number of processes are not digitalised. Simultaneously, many special processes are used in production, such as incremental bending. In order to model and efficiently design multi-stage processes with methods such as FEM, automation and linking of the individual simulations are necessary. This paper therefore presents a method for automatically simulating and evaluating a complete incremental bending process with 24 strokes in LS-Dyna using a Python framework with cfiles. The final validation of the force–displacement relationships and inner radii of the gener
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18

Zhang, Peng, and Hong Wei Liu. "Simulation and Control Models of Laser Bending Angle of Sheet Metals." Key Engineering Materials 431-432 (March 2010): 118–21. http://dx.doi.org/10.4028/www.scientific.net/kem.431-432.118.

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Laser bending process of sheet metals is a highly flexible forming technique. Simulate model of laser bending process was established by dimension analysis, and the control model of laser bending was achieved with the regression of swatch datum. It was shown that dimension analysis was an effective method in simulating the complex laser bending process, and the control model, which came from non-dimension group datum, was a high-accuracy model in predictive analysis of bending angle.
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19

Lin, Jui-Chang, and Kingsun Lee. "Optimization of Bending Process Parameters for Seamless Tubes Using Taguchi Method and Finite Element Method." Advances in Materials Science and Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/730640.

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The three-dimensional tube (or pipe) is manufactured by CNC tube bending machine. The key techniques are determined by tube diameter, wall thickness, material, and bending radius. The obtained technique through experience and the trial and error method is unreliable. Finite element method (FEM) simulation for the tube bending process before production can avoid wasting manpower and raw materials. The computer-aided engineering (CAE) software ABAQUS 6.12 is applied to simulate bending characteristics and to explore the maximum stress and strain conditions. The Taguchi method is used to find the
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20

Phanitwong, Wiriyakorn, Arkarapon Sontamino, and Sutasn Thipprakmas. "Effects of Part Geometry on Spring-Back/Spring-Go Feature in U-Bending Process." Key Engineering Materials 549 (April 2013): 100–107. http://dx.doi.org/10.4028/www.scientific.net/kem.549.100.

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The U-bending process is a common sheet-metal forming process widely employed to fabricate sheet parts like channels, beams, and frames of various sizes applied in almost all industrial fields. In recent years, the precision requirements are increased on the U-bent parts. To achieve these requirements, in this study, the effects of part geometry on the spring-back/spring-go feature including work piece length, U-channel width, punch and die radii, and work piece thickness, were investigated by using the finite element method (FEM) and laboratory experiments. The FEM simulation results clearly
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21

Idem, K., and J. Peddieson. "Simulation of the Age Forming Process." Journal of Manufacturing Science and Engineering 127, no. 1 (2005): 165–72. http://dx.doi.org/10.1115/1.1828058.

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It is demonstrated that an age forming model based on the assumptions that the loading and unloading phases are dominated by linear elasticity while the aging phase is dominated by nonlinear stress relaxation is in qualitative agreement with experimental data for several typical viscoelastic constitutive equations. A simplified version of this model is applied to the bending of beams (and long plates) and used to generate closed form solutions.
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22

Chang, Sung Ho, and Young Moo Heo. "Study on the Roller-Bending Simulation to Promote Productivity in the HINGE STRAP Forming System." Materials Science Forum 695 (July 2011): 149–52. http://dx.doi.org/10.4028/www.scientific.net/msf.695.149.

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The purpose of present study was to increase productivity and to promote the quality of the part in the forming system for hinge strap in automobile. So the roller-bending simulation was carried out to develop the forming system for the hinge strap. A square tube used in the roller-bending for the hinge strap was fabricated using process of the sheet forming and the welding. So study on the mechanical properties of the original metal sheet (SPCC 1.6t) and weld-line (including a HAZ) were performed before the roller-bending simulation. And the body forces of the roller (rigid body) in the rolle
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23

Lai, Yi Nan, Sheng Le Ren, G. Y. Zhang, and Gang Feng Liu. "Study on Forming Quality Control of Bending Tube in Power Station Boiler." Key Engineering Materials 392-394 (October 2008): 409–13. http://dx.doi.org/10.4028/www.scientific.net/kem.392-394.409.

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A FEM-numerical simulation system is developed to simulate the process of rotary draw bending of tube. The emphasis is to discuss some factors such as tube materials, bending moment of fan-shaped die, pushing force of sliding slot and tube relative bending radius which have an effect on tube bending quality. The quality parameters of ovality, thinning ratio and thickening ratio are the same as the measurement values in the practical production. Some improved methods are put forward to according to the simulation results. The experiment shows that the simulation system can forecast accurately t
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24

Song, Ji Shun, Yun Tao Li, De Heng Du, Xu Ma, and Kang Yin. "Numerical Simulation of Eccentric Extrusion Form Bending Pipe Parts." Materials Science Forum 704-705 (December 2011): 1492–97. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.1492.

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Eccentric extrusion method is used in this paper,through this method achieved bending aluminum-alloy tube extrusion forming process. Used finite element method,achieved three-dimensional numerical simulation of bending aluminum-alloy tube in eccentric extrusion by DEFORM-3D finite element commercial software,analyzed velocity field distribution,material flow,squeezing pressure,stress and strain field distribution of the process;Introduce the mechanism of one step direct extrusion forming tube bending process,it will be of great guiding significance the actual die design.
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25

Daiezadeh, Vahid, Majid Elyasi, Behzad Rahmani, and Mohammad Bakhshi-Jooybari. "Experimental and Numerical Investigation of the Effect of Anisotropy on Springback in U-Bending Process." Key Engineering Materials 473 (March 2011): 645–52. http://dx.doi.org/10.4028/www.scientific.net/kem.473.645.

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In this research, the effect of anisotropy on springback in CK67 steel sheet in U-bending process was studied by finite element simulation and experimental approach. The finite element software, ABAQUS/EXPLICIT 6.7, was used for simulation. In order to verify the simulation results some experiments were performed. The obtained results indicated that increasing the bending angle to the rolling direction resulted in an increase in springback. The results of the experiments were compared with simulation results. There was significant agreement between simulation and experiment.
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26

Chen, Bao Guo, Zhi Bin Huang, Xue Ting He, Lei Liu, and Zhi Bo Zhao. "Numerical Simulation Analysis for Padding Assisted Roll-Bending Process." Advanced Materials Research 1120-1121 (July 2015): 1153–57. http://dx.doi.org/10.4028/www.scientific.net/amr.1120-1121.1153.

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Padding assisted roll-bending process is an advanced method to manufacture cylindrical thin-walled structure with variable thickness. A finite element model was established to study the deformation behavior of the padding assisted roll-bending process. In the numerical simulation model, aluminum sheet was selected as an elasto-plastic model, and nylon material was as an elastic model. The research results show that the radius of roll-bent thin-walled aluminum cylinder decreases with increasing of padding material’s stiffness, decreasing of the thickness ratio of nylon-to-metal and increasing o
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27

Feng, Zhengkun, and Henri Champliaud. "Modeling and simulation of asymmetrical three-roll bending process." Simulation Modelling Practice and Theory 19, no. 9 (2011): 1913–17. http://dx.doi.org/10.1016/j.simpat.2011.05.006.

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28

Heller, B., and M. Kleiner. "Semi-analytical process modelling and simulation of air bending." Journal of Strain Analysis for Engineering Design 41, no. 1 (2006): 57–80. http://dx.doi.org/10.1243/030932405x30966.

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29

Fan, Ruoxun, Jie Liu, and Zhengbin Jia. "Effects of Different Numerical Methods on the Fracture Prediction Accuracy for Cortical Bone Structure under Bending Load." Applied Sciences 13, no. 6 (2023): 3998. http://dx.doi.org/10.3390/app13063998.

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Three numerical methods, including element instantaneous failure, continuum damage mechanics, and extended finite element methods, are mainly used to simulate the fracture in cortical bone structure. Although many simulations focus on the cortical bone fracture, few have investigated the differences in prediction accuracy among the three numerical methods. The purpose of this study was to evaluate the prediction accuracy and applicability of the three numerical methods in simulating cortical bone fracture under bending load. The rat femur samples were first used to perform the three-point bend
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30

Zhang, Tao, Manquan Zhao, Fei Liu, et al. "A discrete element method model of corn stalk and its mechanical characteristic parameters." BioResources 15, no. 4 (2020): 9337–50. http://dx.doi.org/10.15376/biores.15.4.9337-9350.

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In a simulation model of the process of corn straw crushing, its physical parameters and the model itself influence the accuracy of the numerical calculations of the discrete element method. This study attempts to improve the simulation accuracy of the crushing process and to find the optimal combination of parameters. Based on the Hertz-Mindlin with Bonding contact model, multiple particle replacement and bonding programs written using Visual Studio were imported through the application programming interface (API) of a discrete element method (DEM) model to establish three particle-bonding ma
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31

Kang, Feng, E. Chuan Yang, Qiang Chen, and Chuan Kai Hu. "Simulation and Experiment Study on Upsetting Process of Crankshaft." Applied Mechanics and Materials 633-634 (September 2014): 712–16. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.712.

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Aim at the bending and upsetting process of a kind of crankshaft, this paper analyze the technical difficulty and treatment measures during the process. The metal flowing and the defects easily occur during the deformation are visual reappeared by the FEM, moreover, the influence of the thickness of flash and the size of fillet on the quality of crank is also analyzed. Takes the crank as an object, the experiment of bending and upsetting deformation is carried on, which verified the accuracy of the simulation result, and finally, the crank is qualified with fullness deformation, continuous fib
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32

Bekar, Deniz, Erdem Acar, Firat Ozer, and Mehmet Ali Guler. "Constructing Surrogate Models for Springback in U-Bending Process." Advanced Materials Research 445 (January 2012): 177–82. http://dx.doi.org/10.4028/www.scientific.net/amr.445.177.

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In this study, surrogate models are constructed to approximate the behavior of simulation models for springback angles, sidewall curl, and sheet thickness reduction in U-bending process. The surrogate-modeling techniques used here are: (i) polynomial response surface (PRS), (ii) Kriging (KR) and (iii) radial basis functions (RBF). While constructing surrogate models, the following procedure is pursued. First, a set of training points is generated using Latin hypercube sampling method, and finite element simulations are performed at these points. Then, surrogate models are constructed utilizing
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33

Jia, Bao Xian, Wen Feng Bian, and Ning Peng. "Structural Design and Performance Testing of SMPC Deployable Hinge." Applied Mechanics and Materials 893 (July 2019): 104–8. http://dx.doi.org/10.4028/www.scientific.net/amm.893.104.

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SMPC (shape memory polymer composites) has many advantages as a hinge of spacedeployable antenna. The structure of the SMPC hinge is designed and tested in this paper. The basicmechanical properties of composites are calculated. Through finite element simulation, the bendingmoment of the positive and reverse of the lamella with the bending angle as the lamella with the fiberdifferent content, the bending of the lamella with different bending distances was simulated, and thecurves of bending moment with bending angle in different bending distances were obtained. Hingebending process simulation
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34

Chen, Chuandong, Jicai Liang, Yi Li, Ce Liang, and Wenming Jin. "Springback Analysis of Flexible Stretch Bending of Multi-Point Roller Dies Process for Y-Profile under Different Process Parameters." Metals 11, no. 4 (2021): 646. http://dx.doi.org/10.3390/met11040646.

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Springback is a common defect caused by elastic recovery in the plastic forming process, which can cause the formed workpiece to deviate from the target shape. The purpose of this paper is to grasp the influence law of process parameters on springback deviation so as to optimize process parameters to reduce springback. Taking the Y-profile as the research object, the influence of process parameters such as horizontal bending radius, vertical bending radius, transition zone length, radius of roller dies, and wall thickness of the profile on springback deviation is discussed by numerical simulat
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35

Buang, Muhamad Sani, Shahrul Azam Abdullah, and Juri Saedon. "Simulation and Experimental Investigation of Springback in Air V-Bending Process Using Finite Element Method (FEM)." Applied Mechanics and Materials 680 (October 2014): 292–96. http://dx.doi.org/10.4028/www.scientific.net/amm.680.292.

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This paper presents an investigation on cold bending process using simulation and experimental study. The experimental and simulation was performed on stainless steel 304 sheet metal in air V-bending. The factors involved in the process are punch radius, die radius, die gap, punch travel and punch velocity. The aim of this paper is to investigate the factors that affect the springback behavior of stainless steel in air V-bending using Finite Element Method (FEM) software Simufact-FormingTM version 11.0 and material database MatILDa. The simulation parameters followed the actual setting under c
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36

RIHACEK, JAN, MICHAELA CISAROVA, EVA PETERKOVA, and KAMIL PODANY. "INFLUENCE OF THE PRESSURE DIE GEOMETRY ON THE BENT TUBE OVALITY." MM Science Journal 2021, no. 2 (2021): 4474–82. http://dx.doi.org/10.17973/mmsj.2021_6_2021082.

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The paper deal with analysis and optimization of the pressure bar geometry in the case of the tube bending. The bending process is realized on Wafios RBV 60 ST CNC bending machine using rotary draw bending system. The processed semi-finished product is a tube, which is made of 24MnB5 steel. Currently, after tube bending by an angle of 120°, an unacceptable ovality occurs on its body. Therefore, the article presents the optimization of the pressure bar geometry, which helps to prevent the occurrence of the mentioned defect. Due to the least possible intervention in the bending process, only the
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37

Zhou, Jun Rong, Yi Hang Peng, and Jian Peng Hu. "Simulation and Analysis of Speed Accessory Based on DYNAFORM." Advanced Materials Research 889-890 (February 2014): 262–67. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.262.

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This paper study the object of the speed accessory and give the forming numerical simulation of its bending process based on software DYNAFORM. The simulation analysis the effects to its bending springback produced by four factors such as thickness of plate, die fillet, texture of material and the friction coefficient, and research on the factors affect the springback through the orthogonal experiment method, determine the impact factor of the four factors to the bending springback process and find the optimum technological parameters combination.
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38

Sun, Shuo, Wen Zhi Fu, Ming Zhe Li, Yong Ping Zhou, and Ying Li. "Effect of Forming Parameters on Flexible-Bending of Three-Dimensional Tubes." Materials Science Forum 937 (October 2018): 69–76. http://dx.doi.org/10.4028/www.scientific.net/msf.937.69.

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Flexible-bending is an advanced bending method, especially suitable for small batch production of tubes. The shape of forming parts is mainly related to the offset of the bend die instead of the geometry of it. Based on flexible-bending technology, 3D bending of tubes was carried out by finite element method and the effects of primary parameters on the bending results were studied. The analysis results showed that3D continuous bending of tubes can be obtained by flexible-bending process; die offset, offset speed and feeding speed of tube have a great influence on the bending effect. Bending ex
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39

Wang, Bing, Bao Feng Guo, Miao Jin, Wen Cheng Zhao, Shi Yan Zhao, and Zong Yuan Zou. "Study on Deformation Coordination in Upsetting Forging Process of the Crank of Continuous Fiber Crankshaft for Marine." Advanced Materials Research 418-420 (December 2011): 1324–29. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1324.

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In upsetting forging process of the crank of crankshaft the defects such as lap and caving probably occurs since the bending and upsetting is not in good coordination. In this paper, aiming at 305 crankshaft for marine engine, the coordinative relation between bending and upsetting was thoroughly studied based on 3-step crank upsetting forging approach, i.e. bending-upsetting, upsetting and finish forming. Numerical simulation was carried out to find the reasonable stroke matches of bending and upsetting and physical experiment of using lead sample reduced at the ratio 1:6 in size was conducte
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Xu, Shi Min, Hua Gui Huang, and Deng Yue Sun. "Numerical Simulation on Spiral Hot Bending Process for End Sheet of Tubular Pile." Advanced Materials Research 562-564 (August 2012): 1373–76. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.1373.

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A new manufacturing method of spiral hot bending process for the end sheet of tubular pile was introduced in this paper. A three-dimensional (3-D) thermal-mechanical coupled elastic-plasticity finite element model was setup to simulate the hot bending process, and then, the section deformation mechanism from hot bar by rolling to the end sheet has been investigated from the simulation results. The industry manufacture conditions show that the efficiency and quality has been highly improved by the spiral hot bending process. The thickness variety along the radial direction of the workpiece has
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Li, Bo, Guo Ming Zhu, Yong Lin Kang, Nuan Nuan Pei, and Gong Ming Tao. "Research of Three Dimensional Finite Element Simulation of Rail during Cooling and Pre-Bending Process." Advanced Materials Research 798-799 (September 2013): 311–15. http://dx.doi.org/10.4028/www.scientific.net/amr.798-799.311.

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In this paper, with the thermal mechanical coupled method and the whole rolling process simulation result using as the initial thermal field, the thermal field and deformation of rail during cooling have been simulated, then rail pre-bending process is proposed according rail bending deformation curve during cooling The results show that the bending curve formula fitting by rail cooling deformation curve is accurate comparing with the actual situation. Moreover, pre-bending process is set by fitting formula, and the rail recovers straightly after cooling.
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Hao, Nan Hai, and Yu Ling Gai. "Numerical Simulation on the Laser Bending of Thin Wall Tubes." Key Engineering Materials 460-461 (January 2011): 798–801. http://dx.doi.org/10.4028/www.scientific.net/kem.460-461.798.

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Laser tube bending is a spring-back-free noncontact forming method that has received considerable attention in recent years. Compared to mechanical bending, no hard tooling, dies, or external force is used in laser bending, thus the cost is greatly reduced for small-batch production and prototyping. Some quality issues, such as cross sectional distortion and intrados protrusion exist in laser bending and have growing tendency when the tube’s wall being thinner. This paper investigates the effects of process parameters on the deformation of thin wall tube through numerical simulations and exper
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Chen, Yi Bin, Jian Zhong Zhou, Shu Huang, and Yue Qing Sun. "FE Simulation of Complex Contour Forming of Sheet Metals Based on Laser Bending." Materials Science Forum 575-578 (April 2008): 696–701. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.696.

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Laser bending is a flexible forming process which forms sheet metal by means of stresses induced by external heat instead of external forces. In this paper, a three-dimensional coupled thermal-mechanical model for numerical simulation is established with finite element code ABAQUS. Some key problems about the simulation of laser bending are investigated in detail, and the reasonable solutions are presented. Taking AISI-1008 steel as an example, numerical simulations are carried out for the complex contour forming of sheet by using Sequentially Coupled Thermal-Stress Analysis technique. Then th
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Luo, Lin Lin, Da Sen Bi, Yan Bi, et al. "Numerical Simulation and Analysis on Bending Forming of Hull Plate." Materials Science Forum 704-705 (December 2011): 1451–57. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.1451.

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Bending process is one of the important methods to form thick hull plate, whose accuracy is directly related to the quality of hull plate forming.In this paper, bending process of thick hull plate is simulated by using finite element software ANSYS, and some simulation results on bending deformation of thick hull plate such as the deformation of meshes in deformation zone, the distributions of the Von Mises stress and effective strain are obtained.
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Zhang, Ling Yun, and Ren Chang Huang. "Research on the Hole Shape Distortions Near the Bending Plastic Deformation Area." Applied Mechanics and Materials 401-403 (September 2013): 696–99. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.696.

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In this paper, a research work on the hole shape distortion of commercial-purity aluminum plates in the bending process was carried out. The bending process was simulated by using ABAQUS software in order to reveal the phenomenon and law of hole shape distortions near deformation area. A series of bending tests were conducted for the comparison of simulation results. By measuring the hole diameter under different conditions, the factors that affect distortion level were obtained, including hole distance and initial plate thickness. The rationality of this distortion law was proved by finite el
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Guan, Yan Jin, Hong Mei Zhang, Sheng Sun, and Guo Qun Zhao. "Numerical Study on Influences of Process Parameters on Laser Tube Bending." Advanced Materials Research 148-149 (October 2010): 590–94. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.590.

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Laser bending process of tubes is a new flexible forming process without rigid tools and external forces. The tube is formed by internal thermal stress induced by laser irradiation. The process simulation of laser bending of tubes is realized numerically. When the other parameters remain invariable, the laser bending angle augments with the increase of the laser power. The laser bending angle decreases with the increase of the scanning velocity. Meanwhile, the bending angle varies with the diameter of the laser spot. The angle begins to decrease when the laser spot diameter get to an optimum v
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Lin, Xiao Juan, Guang Chun Wang, Hua Jiang, and Jin Li. "Experimental Investigation and Numerical Simulation of Pure Copper Foil Springback in Micro-Bending Process." Key Engineering Materials 609-610 (April 2014): 531–35. http://dx.doi.org/10.4028/www.scientific.net/kem.609-610.531.

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Springback is an important factor influencing forming precision in bending process, which becomes more complex for micro metal foil due to the size effect existing. Bending springback is studied through the micro bending experiments designed with different grain sizes and foil thicknesses using T2 purple copper in this paper. The accurate stress-strain relationships are obtained based on the copper foil tensile experiments; the bending process of micro-component is simulated based on both dynamic explicit and static implicit codes. Comparison of simulation results with experimental results sho
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Fukuda, Naoki, Hiroshi Yatabe, Shinobu Kawaguchi, Takahito Watanabe, and Tomoki Masuda. "Experimental and Analytical Study of Cold Bending Process for Pipelines." Journal of Offshore Mechanics and Arctic Engineering 125, no. 2 (2003): 153–57. http://dx.doi.org/10.1115/1.1554701.

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The behavior during the cold bending of pipelines was experimentally and analytically investigated. Full-scale cold bending experiments were performed on API X60 and X80 grade line pipes. Finite element (FE) analyses simulated the cold bending process by considering the contact interactions between a pipe and the components of the bending machine. The results of the simulation were in good agreement with the full-scale experiments. The stress-strain relationship and yield to tensile ratio (Y/T) had no obvious effect on the strain distribution after cold bending. The tensile tests quantitativel
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Tong, Rui Hong, and Yi Lv. "Based on ABAQUS Roll Bending Forming Simulation Numerical Algorithm." Advanced Materials Research 482-484 (February 2012): 1442–46. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.1442.

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This paper first to roll bending forming algorithm is-implicit algorithm and genetic algorithm was carried on the detailed comparison demonstrates to the existing literature experiment for object model, based on the implicit algorithm, established for prediction of the residual stress multi-channel times roll bending forming simulation method, solve the problems of the simulation process convergence, and the influence of the cold bending forming the prediction precision steel simulation parameters were analyzed. Sure the implicit algorithm based on the roll bending forming lane simulation meth
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Guo-qing, Chen, Yang Jian, Li Hong-xiang, Fu Xue-song, Tang Rui, and Zhou Wen-long. "Push-bending Process and Forming Quality of Stainless-steel Tubes." MATEC Web of Conferences 190 (2018): 04006. http://dx.doi.org/10.1051/matecconf/201819004006.

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The push-bending process of stainless-steel tubes was investigated by using the experimental method and finite element (FE) analysis based on the commercial software MSC.MARC. The effects of the processing parameters and the lubricating condition on the forming quality of as-obtained ASTM304 tubes were discussed. The results demonstrated that the experiment results were consistent with the simulation both in deformation behaviour and the stress distribution during the push-bending process, which verified the reliability of the established FE-model. The results also show that the maximum residu
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