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Artykuły w czasopismach na temat „Forming simulations”

Autor: Grafiati

Data publikacji: 26 października 2024

Data aktualizacji: 31 lipca 2025

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1

Myllykoski, P. "Using forming simulations to improve mechanical simulation accuracy." Journal of Materials Processing Technology 177, no. 1-3 (2006): 422–25. http://dx.doi.org/10.1016/j.jmatprotec.2006.04.096.

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Sherek, Paul A., Louis G. Hector, John R. Bradley, Paul E. Krajewski, and Eric M. Taleff. "Simulation and Experiments for Hot Forming of Rectangular Pans in Fine-Grained Aluminum Alloy AA5083." Key Engineering Materials 433 (March 2010): 185–95. http://dx.doi.org/10.4028/www.scientific.net/kem.433.185.

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Accurate numerical simulation capability is critical to the development and implementation of hot forming technologies. Numerical simulations were developed for gas-pressure forming of commercial, fine-grained aluminum-magnesium (AA5083) material into deep pan shapes at 450°C. These simulations utilize a material constitutive model recently developed for fine-grained AA5083 materials as a user-defined routine in commercial Finite Element Method (FEM) software. Results from simulations are compared against data from gas-pressure forming experiments, which used the same forming conditions and di

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3

Abspoel, M., M. E. Scholting, and M. Lansbergen. "Thermomechanical forming and crash simulations." IOP Conference Series: Materials Science and Engineering 651 (November 25, 2019): 012044. http://dx.doi.org/10.1088/1757-899x/651/1/012044.

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4

Zhou, Tian Feng, Ji Wang Yan, and Tsunemoto Kuriyagawa. "Comparing Microgroove Array Forming with Micropyramid Array Forming in the Glass Molding Press." Key Engineering Materials 447-448 (September 2010): 361–65. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.361.

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This paper presents a glass molding press (GMP) method to fabricate microgroove array and micropyramid array on the glass plate by replicating the shape of the mold to the glass surface. The differences between microgroove forming and micropyramid forming were investigated by experiments and finite element method (FEM) simulations. Microgroove arrays and micropyramid arrays were generated on the flat glass plate in the GMP process by using an electroless-plated Nickel Phosphorus (Ni-P) mold, on which the microstructures are fabricated by micro cutting. Furthermore, FEM simulations were used to

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5

Dubovská, Rozmarína, and Jozef Majerik. "Modeling and Virtual Simulation of Hard Surface Milling and Forming Process Using Advanced CAE Systems." Advanced Materials Research 941-944 (June 2014): 2321–31. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.2321.

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This paper presents the influence of modeling and simulation techniques for hard milling and forming. The aim of these simulations is the ability to optimize the manufacturing technologies even before the real production of its own tools, because their manufacturing process is very difficult in terms of production time, materials and other costs. The simulated results visualize roughing and finishing process of milling and generate tool-paths in CATIA V5. Simulation results of forming realized in PAM-Stamp 2G using a 3D model of the punch and the blank confirm the suitability of the proposed d

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6

Sedlmaier, Albert, Thomas Dietl, André Abee, Johann Harrasser, and Miguel Sousa Pereira. "Integrated Simulation Process Chain: From 3D Roll Forming Design to Crash Analysis." MATEC Web of Conferences 408 (2025): 02035. https://doi.org/10.1051/matecconf/202540802035.

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This paper presents an innovative numerical simulation process chain for sheet metal profiles, addressing the full workflow from tooling design and 3D roll forming process simulation to crash simulation. The process begins with defining the bending sequence and the corresponding tooling, tailored to the specifications of a 3D roll forming line. A dedicated preprocessor creates “ready-to-run” finite element models, ensuring an accurate representation of the complex deformation behaviour. Those models include the meshing and material description of the blank and the kinematics used in the proces

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7

Wróbel, Ireneusz, and Damian Firganek. "Simulations of hot forming processes of variable thicknesses workpieces." Mechanik 90, no. 11 (2017): 991–93. http://dx.doi.org/10.17814/mechanik.2017.11.159.

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Methodology of production process analysis – by means of hot forming – using workpieces of variable thickness, was presented. Finite element simulations were performed using specialized software for the typical car body element – the longitudinal longeron. The simulation results were presented and discussed as well as conclusions and recommendations were formulated.

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8

Taylor, L., J. Cao, A. P. Karafillis, and M. C. Boyce. "Numerical simulations of sheet-metal forming." Journal of Materials Processing Technology 50, no. 1-4 (1995): 168–79. http://dx.doi.org/10.1016/0924-0136(94)01378-e.

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9

Governato, F., B. Willman, L. Mayer, et al. "Forming disc galaxies in CDM simulations." Monthly Notices of the Royal Astronomical Society 374, no. 4 (2007): 1479–94. http://dx.doi.org/10.1111/j.1365-2966.2006.11266.x.

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10

Paunoiu, V., P. Cekan, E. Gavan, and D. Nicoara. "Numerical Simulations in Reconfigurable Multipoint Forming." International Journal of Material Forming 1, S1 (2008): 181–84. http://dx.doi.org/10.1007/s12289-008-0021-4.

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11

Giraud-Moreau, Laurence, Jie Zhang, Abel Cherouat, and Houman Borouchaki. "Process Enhancement for Single Point Incremental Forming through a Remeshing Strategy." Advanced Materials Research 682 (April 2013): 135–41. http://dx.doi.org/10.4028/www.scientific.net/amr.682.135.

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Simulations of Single Point Incremental Forming generally require a very high computation time because the tool path is long and small elements are required everywhere on the sheet. In this paper, a remeshing method based on refinement and coarsening strategies is used with abaqus/explicit to reduce the computational time. The simulation of a semi-spherical cup with a fine mesh is considered as a reference simulation. The remeshing method allows reducing the number of elements and therefore the CPU time during the simulations. A good prediction is observed with the remeshing method.

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12

Huang, Hui, and Mikeal Nygårds. "Numerical Investigation of Paperboard Forming." Nordic Pulp & Paper Research Journal 27, no. 2 (2012): 211–25. http://dx.doi.org/10.3183/npprj-2012-27-02-p211-225.

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Abstract A three dimensional numerical investigation of a commercial four-ply paperboard formed into a pear-shaped mould was presented. The numerical investigation included the effect of pressure, boundary conditions, material properties and different deformation and damage mechanisms such as delamination and plasticity. Simulations were done in both the MD and CD using different pressures. A paperboard model with a combination of anisotropic continuum model and a softening interface model had good deformation behavior during the forming simulations. Forming experiment that mimicked the simula

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13

Chen, Li Jun, Geng Pei, Qing Bo Fang, and Jun Jie Pan. "A General Method of Numerical Simulation for Incremental Forming." Advanced Materials Research 403-408 (November 2011): 4084–88. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.4084.

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This paper presents a general simulation method for sheet metal incremental forming(ISF). Firstly, a three-dimensional finite element model based on Dynaform was developed to simulate the process. The tool path during the process simulation was directly defined by numerical control (NC) code and so identical with that in operation. Then, the results of numerical simulations with different process parameters, such as tool diameter, depth increment and wall angle, were discussed in details. The simulations reveal that with the decreasing depth step, increasing tool diameter and wall inclination

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14

Liu, Jun, Mei Ling Guo, Ming Jen Tan, and Beng Wah Chua. "FEM Study of Superplastic-Like Forming of Ti-6Al-4V Alloy." Materials Science Forum 783-786 (May 2014): 607–12. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.607.

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A superplastic-like forming (SPLF) process involving the use of hot drawing along with blow forming is studied here. The hot drawing stage helps in enhancing the formability and in fast forming the metal sheet into a hollow shape with desired amount of material draw-in. During the blow forming stage, gas pressure was applied onto the pre-formed part to complete the forming process at a targeted strain rate. Ti-6Al-4V sheets have been successfully formed by this process at 800 °C in 16 min. In this paper, finite element modeling (FEM) was used to demonstrate the effects of each stage (hot drawi

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15

Zhao, De Ying, Lian Dong Zhang, and Li Na Sun. "Forming Mechanism of Folding Defect within Closed Die Forming Car Steering Knuckle." Materials Science Forum 704-705 (December 2011): 240–44. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.240.

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Steering knuckle is the key part of vehicle steering system. The forming technology combined closed die pre-forging with open finish-forging has some advantages such as higher material utilization ratio and lower forming forces and so on. While simulating the closed die extrusion forming process of car steering knuckle, folding defect emerges on the contact area of Branch I and lower punch in the lateral extrusion process. The forming mechanism of the folding defect is studied by numerical simulations and experiments, which mainly consider the influence of lower punch shape and size, extrusion

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16

Zeng, Danielle, Laurent Chappuis, Z. Cedric Xia, and Xinhai Zhu. "A Path Independent Forming Limit Criterion for Sheet Metal Forming Simulations." SAE International Journal of Materials and Manufacturing 1, no. 1 (2008): 809–17. http://dx.doi.org/10.4271/2008-01-1445.

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17

Vijayan, Aditi, Biman B. Nath, Prateek Sharma, and Yuri Shchekinov. "Radio haloes of star-forming galaxies." Monthly Notices of the Royal Astronomical Society 492, no. 2 (2019): 2924–35. http://dx.doi.org/10.1093/mnras/stz3568.

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ABSTRACT We study the synchrotron radio emission from extra-planar regions of star-forming galaxies. We use ideal magnetohydrodynamic simulations of a rotating Milky Way-type disc galaxy with distributed star formation sites for three star formation rates (0.3, 3, 30 M⊙ yr−1). From our simulations, we see emergence of galactic-scale magnetized outflows, carrying gas from the disc. We compare the morphology of the outflowing gas with hydrodynamic simulations. We look at the spatial distribution of magnetic field in the outflows. Assuming that a certain fraction of gas energy density is converte

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18

Pilthammar, J., M. Sigvant, M. S. Islam, et al. "An overview of Methods for Simulating Sheet Metal Forming with Elastic Dies." IOP Conference Series: Materials Science and Engineering 1284, no. 1 (2023): 012054. http://dx.doi.org/10.1088/1757-899x/1284/1/012054.

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Abstract Sheet metal forming (SMF) simulations are traditionally carried out with rigid active forming surfaces. This means that the elasticity and dynamics of presses and die structures are ignored. The only geometries of the tools included in the simulations are the active forming surfaces. One reason for this simplification is the large amount of computational power that is required to solve finite element (FE) models that incorporates elastic stamping dies. Another reason is the lack of die CAD models before the later stages of stamping projects. Research during the last couple of decades

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19

Jung, Dong Won. "Investigation on Variation of Bow Defect in Roll Forming Process." Key Engineering Materials 729 (February 2017): 80–85. http://dx.doi.org/10.4028/www.scientific.net/kem.729.80.

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Roll forming is a kind of plastic forming process in which a steel strip is bent by several sets of rolls gradually into the desired shape. The products are cold roll forming steels with various sections. Roll forming is one of the most widely used processes in the world for forming metal. Roll forming is a complex deformation process, which involves large displacement, finite strain and the problems of contact and friction between strip and rolls. This process exhibits obvious geometry, physical and boundary nonliterary. The complex processes contain many aspects such as geometry, kinematics

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20

Gallée, Sebastien, Antoine Martin, Vincent Robin, and Daniel Nelias. "Influence of Forming Residual Stresses on the Welding Distortions of Two Thick Plates." Advanced Materials Research 83-86 (December 2009): 125–32. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.125.

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The manufacturing of the ITER (International Thermonuclear Experimental Reactor) vacuum vessel involves the welding of thick deformed plates. The aim of this study is to investigate the influence of forming residual stresses on the welding distortions of two thick plates. The plates are deformed using a three point rolling process. A first numerical simulation is performed to investigate the residual stresses induced by this process. The forming residual stresses are taken into account as initial conditions to perform the electron beam welding simulation of a deformed plate. This simulation fi

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21

Liu, Ming Jun, Zhen Yu Zhao, and Bai Liu. "Process Optimization for the Side-Plate of the Core Part in Parallel Flow Evaporator." Applied Mechanics and Materials 55-57 (May 2011): 961–65. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.961.

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The forming scheme of a side-plate of the core part in parallel flow evaporator was studied. Two forming schemes were compared and the explicit dynamic software DYNAFORM was applied to make simulations about the forming processes. According to comparisons between two forming schemes, the optimized scheme and process parameters were determined. Multi-station dies were designed based on the optimized process. Successful experiments with the dies showed that numerical simulation provided an efficient way for the optimization of the forming scheme in the side-plate production.

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22

Jeanson, Anne Claire, Gilles Avrillaud, Gilles Mazars, et al. "Determination of High Strain-Rate Behavior of Metals: Applications to Magnetic Pulse Forming and Electrohydraulic Forming." Key Engineering Materials 611-612 (May 2014): 643–49. http://dx.doi.org/10.4028/www.scientific.net/kem.611-612.643.

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The design of processes like magnetic pulse forming and electrohydraulic forming involves multiphysical couplings that require numerical simulation, and knowledge on dynamic behaviour of metals. The forming process is completed in about 100 μs, so that the workpiece material deforms at strain-rates between 100 and 10 000 s-1. In this range, the mechanical behaviour can be significantly different than that in quasi-static conditions. It is often noticed that the strength and the formability are higher. The main goal of this study is to use an electromagnetically driven test on tubes or sheets t

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23

LI, JINGMEI, and SHELDON I. GREEN. "Fiber interaction with a forming fabric." August 2012 11, no. 8 (2012): 39–46. http://dx.doi.org/10.32964/tj11.8.39.

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During sheet forming, the structure of the forming fabric leaves wire marks on the pulp mat. Paper nonuniformity caused by the wire mark can lead to ink nonuniformity in printing. We investigated wire mark numerically through simulations of the interaction of individual fibers with a forming fabric. In the simulations, the flow field through the forming fabric was taken to be that of single-phase water flow without disturbance of fibers. A particle level simulation method was applied to simulate the motion of fibers in the flow through a single layer sine-wave fabric. A hundred fibers of rando

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24

Ryou, Hansun, Kwansoo Chung, Jeong-Whan Yoon, Chung-Souk Han, Jae Ryoun Youn, and Tae Jin Kang. "Incorporation of Sheet-Forming Effects in Crash Simulations Using Ideal Forming Theory and Hybrid Membrane and Shell Method." Journal of Manufacturing Science and Engineering 127, no. 1 (2005): 182–92. http://dx.doi.org/10.1115/1.1830050.

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In order to achieve reliable but cost-effective crash simulations of stamped parts, sheet-forming process effects were incorporated in simulations using the ideal forming theory mixed with the three-dimensional hybrid membrane and shell method, while the subsequent crash simulations were carried out using a dynamic explicit finite element code. Example solutions performed for forming and crash simulations of I- and S-shaped rails verified that the proposed approach is cost effective without sacrificing accuracy. The method required a significantly small amount of additional computation time, l

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25

Wang, Dao Kuan, Jun Song Jin, and Xin Yun Wang. "Investigation of a Two-Step Rotary Rim-Thickening Process of Disc-Like Blanks." Materials Science Forum 920 (April 2018): 89–94. http://dx.doi.org/10.4028/www.scientific.net/msf.920.89.

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A two-step rotary rim-thickening process of disc-like blanks was investigated by FE simulation and spinning experiments. The preforming shape of cross section for first step was designed as trapezium before forming rectangular-shape rim in the second step. The main factors influencing the blank forming in the first step were groove bottom height h1 and the inclination angle α of the roller. With the increase of h1 and α of the roller in FE simulation, the workpiece will be more prone to lose stability and cause defects. The forming limit diagram was obtained in first step, including stable for

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26

Tang, Zibo, Wei Xiong, Ying Zheng, and Jin Zhang. "The Effects of Forming Angle on the Geometry Accuracy and Mechanical Properties of Al-Li Alloy Truncated Pyramids by Single Point Incremental Forming." Applied Sciences 13, no. 10 (2023): 6144. http://dx.doi.org/10.3390/app13106144.

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In this study, single point incremental forming (SPIF) of Al-Li alloy sheets under different forming angles are studied via both experimental methods and numerical simulations. The effect of different forming angle on the geometric accuracy of SPIFed Al-Li component is studied. The simulation results show that the higher the forming angle, the lower the stress at the corner, leading to better geometrical accuracy, which is also experimentally validated. It is also found that high forming angle leads to better mechanical properties of the SPIFed Al-Li alloy component.

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27

Canales, Diego, Adrien Leygue, Francisco Chinesta, et al. "Efficient Updated-Lagrangian Simulations in Forming Processes." Key Engineering Materials 651-653 (July 2015): 1294–300. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.1294.

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A new efficient updated-Lagrangian strategy for numerical simulations of material forming processes is presented in this work. The basic ingredients are the in-plane-out-of-plane PGD-based decomposition and the use of a robust numerical integration technique (the Stabilized Conforming Nodal Integration). This strategy is of general purpose, although it is especially well suited for plateshape geometries. This paper is devoted to show the feasibility of the technique through some simple numerical examples.

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28

Lenz, Dominic A., Bianca M. Mladek, Christos N. Likos, Gerhard Kahl, and Ronald Blaak. "Monomer-Resolved Simulations of Cluster-Forming Dendrimers." Journal of Physical Chemistry B 115, no. 22 (2011): 7218–26. http://dx.doi.org/10.1021/jp109132m.

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29

Schmid, S. R., J. Liu, M. A. Sellés, and T. Pasang. "Advanced interface models for metal forming simulations." Computational Materials Science 79 (November 2013): 763–71. http://dx.doi.org/10.1016/j.commatsci.2013.07.025.

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30

Yoon, Sangpil, Cheng-Tang Wu, Hui-Ping Wang, and Jiun-Shyan Chen. "Efficient Meshfree Formulation for Metal Forming Simulations." Journal of Engineering Materials and Technology 123, no. 4 (2000): 462–67. http://dx.doi.org/10.1115/1.1396349.

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A stabilized conforming (SC) nodal integration method is developed for elastoplastic contact analysis of metal forming processes. In this approach, strain smoothing stabilization is introduced to eliminate spatial instability in collocation meshfree methods. The gradient matrix associated with strain smoothing satisfies the integration constraint (IC) of linear exactness in the Galerkin approximation. Strain smoothing formulation and numerical procedures for history-dependent problems are introduced. Applications to metal forming analysis are presented, with the results demonstrating a signifi

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31

Potluri, Prasad, Raj Ramgulam, Marco Chilo, and Haseeb Arshad. "Tow-Scale Mechanics for Composite Forming Simulations." Key Engineering Materials 504-506 (February 2012): 255–60. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.255.

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Abstract. Composites are processed by a variety of forming techniques at both preforming and consolidation stages; ranging from hand draping, diaphragm forming, vacuum infusion to Resin Transfer Molding. During these processes, individual fabric or prepreg layers are subjected to inplane tension and shear, inter-ply shear, transverse compression and out-of-plane bending forces. These forming forces are translated into individual tow-level forces leading to tow deformations. Each tow is subjected to tension, transverse compaction (in the plane of the fabric due to shear and normal to the fabric

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32

Aimene, Y., B. Hagege, F. Sidoroff, E. Vidal-Sallé, P. Boisse, and S. Dridi. "Hyperelastic Approach for Composite Reinforcement Forming Simulations." International Journal of Material Forming 1, S1 (2008): 811–14. http://dx.doi.org/10.1007/s12289-008-0259-x.

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Atzema, Eisso, Michael Abspoel, Pascal Kömmelt, and Marc Lambriks. "Towards robust simulations in sheet metal forming." International Journal of Material Forming 2, S1 (2009): 351–54. http://dx.doi.org/10.1007/s12289-009-0534-5.

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34

Canup, Robin M. "Simulations of a late lunar-forming impact." Icarus 168, no. 2 (2004): 433–56. http://dx.doi.org/10.1016/j.icarus.2003.09.028.

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35

Phan, Thi-Ha-Linh, The-Thanh Luyen, and Duc-Toan Nguyen. "A Study Utilizing Numerical Simulation and Experimental Analysis to Predict and Optimize Flange-Forming Force in Open-Die Forging of C45 Billet Tubes." Applied Sciences 13, no. 16 (2023): 9063. http://dx.doi.org/10.3390/app13169063.

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Open-die forging holds a pivotal role in shaping machine parts within industrial applications. This study focuses on the assessment of stress–strain curves for C45 material at different elevated temperatures and strain rates through numerical simulations employing the finite element method (FEM). Specifically, the research investigates how the flow curve of materials at elevated temperatures and individual strain rates impacts the forming force during the flange forming of C45 billet tubes. By comparing the simulation results with experimental data on the flange-forming force, this study obser

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36

Gatouillat, S., A. Barregi, Emmanuelle Vidal-Sallé, and Philippe Boisse. "Simulation of Composite Forming at Meso Scale." Key Engineering Materials 554-557 (June 2013): 410–15. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.410.

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The forming simulation of woven reinforcements allows accessing to information such as fibre position after forming but also deformation state as well as predicting defects such as wrinkles, yarn sliding, and fibre/yarn fracture. The proposed model consists in a mesoscopic description of the reinforcement. It is simple enough to render the simulation of the forming preform possible but describes also properly the main phenomena occurring during the forming. A geometrical model where each yarn is modelled using shell elements in contact-friction with its neighbours is proposed. A hypoelastic be

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37

Sigvant, M., J. Pilthammar, J. Hol, et al. "Friction in Sheet Metal Forming: Forming Simulations of Dies in Try-Out." Journal of Physics: Conference Series 1063 (July 2018): 012134. http://dx.doi.org/10.1088/1742-6596/1063/1/012134.

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38

Woźniak, D., M. Głowacki, M. Hojny, and T. Pieja. "Application of CAE Systems in Forming of Drawpieces with Use Rubber-Pad Forming Processes / Zastosowanie Systemów CAE W Projektowaniu Procesów Tłoczenia Z Użyciem Odkształcalnych Narzędzi." Archives of Metallurgy and Materials 57, no. 4 (2012): 1179–87. http://dx.doi.org/10.2478/v10172-012-0132-2.

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This article shows example result of computer simulations supporting production process of bearing housing of aircraft engine. Verification of both deep drawing process project and tools design were carried out using finite element models implemented in eta/Dynaform 5.8.1 system and LS-DYNA solver. Wrinkling and fracture of the material were the main phenomena subjected to the investigation on the way of numerical analysis. A number of computer simulations were carried out in aim to analyze the deformation and strain distribution in the final product, as well as to eliminate the mentioned defe

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39

van den Boogaard, A. H., H. H. Wisselink, and J. Huétink. "Do Advanced Material Models Contribute to Accuracy in Industrial Sheet Forming Simulations?" Advanced Materials Research 6-8 (May 2005): 71–80. http://dx.doi.org/10.4028/www.scientific.net/amr.6-8.71.

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The accuracy of material models can have a large impact on the overall accuracy of material forming simulations in general and sheet forming simulations in particular. For large strain plastic deformations, the material model usually consists of a yield function and a hardening relation, optionally including the influence of temperature and strain rate. In large-scale simulations it is favourable to keep the model as simple as possible. The ‘allowable’ error in a material model should be in balance with other errors, like the discretisation error and errors in contact and friction modelling. T

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40

Čada, Radek, and Petr Tiller. "Evaluation of Draw Beads Influence on Intricate Shape Stamping Drawing Process." Technological Engineering 11, no. 1 (2014): 5–10. http://dx.doi.org/10.2478/teen-2014-0001.

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Abstract Paper concerns evaluation of influence of shape, size and location of rectangular and semicircular draw beads on sheet-metal forming process. For analysis the simulations of forming process of selected two types of intricate shape stampings with similar ground plan and with approximately the same height from steel strip DC04 with the use of models of optimal blanks made by BSE (Blank Size Engineering) modul of simulation program Dynaform 5.7 were carried out. From simulations of forming process in simulation program Dynaform 5.7 followed that the most suitable is drawing without use o

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Hu, Han, Feng Yu, Song Zhang, et al. "Ultrasonic-Assisted Granular Medium Forming of Aluminum Alloy 6063-T5: Simulations and Experiments." Metals 14, no. 8 (2024): 847. http://dx.doi.org/10.3390/met14080847.

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To address the challenges posed by the complex shapes of hollow parts, this study examined the ultrasonic-assisted granular medium hydroforming (UGMF) process for tubular components. The dynamics of the deformation behavior and deformation control during 6063-T5 aluminum alloy tube free forming by UGMF were studied via simulations and experiments. Based on the ABAQUS software platform, a coupled method based on finite element (FE) simulation analysis and discrete element (DE) analysis for the UGMF free forming process was used. The results showed that ultrasonic vibration (UV) could reduce the

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Albut, Aurelian, and Vlad Ciubotariu. "Optimization of the Blank Holder Force Using Genetic Algorithm Method in Case of a U - Shaped Part." Key Engineering Materials 549 (April 2013): 247–52. http://dx.doi.org/10.4028/www.scientific.net/kem.549.247.

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In case of sheet metal forming the main dimensional errors are caused by the springback phenomena. The present work deals with numerical simulation related to draw bending and springback of U - shaped parts. The current paper is trying to prove out the important role of the blank holder force variation during the forming process. The Dynaform 5.8 software was used to simulate the forming process, in which the blank holder force varies in four steps between 0 and 50 kN. The factorial simulations test plan was made to cover completely the variation domain and 256 simulations were necessarily to

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Zettler, Joachim, and Sjoerd van der Veen. "Novel Aerospace Architectures Made Possible by Forming Simulation." Key Engineering Materials 554-557 (June 2013): 1872–78. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1872.

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In the aerospace industry lightweight design in combination with fast and reliable manufacturing processes are key components to defend the leading position in the worldwide competition. In this frame it is an overall goal to reduce the number of process steps in order to produce parts for an aircraft to its minimum. Integral design is one way to cope with this goal but on the other hand raises a lot of problems that may occur in manufacturing or final assembly. To be able to predict potential bottlenecks or drawbacks in certain designs, finite element simulation can be helpful. Especially if

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Sakash, Aaron, Sumit Moondra, and Brad L. Kinsey. "Effect of Yield Criterion on Numerical Simulation Results Using a Stress-Based Failure Criterion." Journal of Engineering Materials and Technology 128, no. 3 (2006): 436–44. http://dx.doi.org/10.1115/1.2204951.

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Determining tearing concerns in numerical simulations of sheet metal components is difficult since the traditional failure criterion, which is strain-based, exhibits a strain path dependence. A stress-based, as opposed to a strain-based, failure criterion has been proposed and demonstrated analytically, experimentally in tube forming, and through numerical simulations. The next step in this progression to the acceptance of a stress-based forming limit diagram is to demonstrate how this failure criterion can be used to predict failure of sheet metal parts in numerical simulations. In this paper

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Nakamura, Fumitaka, and Zhi-Yun Li. "Protostellar turbulence in cluster forming regions of molecular clouds." Proceedings of the International Astronomical Union 2, S237 (2006): 306–10. http://dx.doi.org/10.1017/s1743921307001640.

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AbstractWe perform 3D MHD simulations of cluster formation in turbulent magnetized dense molecular clumps, taking into account the effect of protostellar outflows. Our simulation shows that initial interstellar turbulence decays quickly as several authors already pointed out. When stars form, protostellar outflows generate and maintain supersonic turbulence that have a power-law energy spectrum of Ek ~ k−2, which is somewhat steeper than those of driven MHD turbulence simulations. Protostellar outflows suppress global star formation, although they can sometimes trigger local star formation by

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Kronsteiner, Johannes, Elias Theil, Alois Christian Ott, Aurel Ramon Arnoldt, and Nikolaus Peter Papenberg. "Modeling of Texture Development during Metal Forming Using Finite Element Visco-Plastic Self-Consistent Model." Crystals 14, no. 6 (2024): 533. http://dx.doi.org/10.3390/cryst14060533.

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In directional forming processes, such as rolling and extrusion, the grains can develop preferred crystal orientations. These preferred orientations—the texture—are the main cause for material anisotropy. This anisotropy leads to phenomena such as earing, which occur during further forming processes, e.g., during the deep drawing of sheet metal. Considering anisotropic properties in numerical simulations allows us to investigate the effects of texture-dependent defects in forming processes and the development of possible solutions. Purely phenomenological models for modeling anisotropy work by

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Sheu, Jinn-Jong, Chien-Jen Ho, Cheng-Hsien Yu, and Kuo-Ting Wu. "Fastener products lightweight design and forming process simulation." MATEC Web of Conferences 185 (2018): 00030. http://dx.doi.org/10.1051/matecconf/201818500030.

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In this research, an integrated design system was established to design the product of nuts with flange and generate the lightweight geometry of product. The multi-stage forming process was evaluated using the CAE simulations. The topology optimization method was used to achieve the lightweight design, that included keeping necessary geometrical features and remove the excess volumes. The topological discrete model had been remodelled into a meaningful geometry which is able to satisfy the requirement of proof load of fastener specification. The final design of the lightweight geometry was ado

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Więckowski, Wojciech. "Numerical Simulation of Forming Process for Cover with Stiffening Components Made of Grade 2 Titanium Sheet Metal." Key Engineering Materials 687 (April 2016): 206–11. http://dx.doi.org/10.4028/www.scientific.net/kem.687.206.

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This study presents the findings of numerical simulations of forming process for an inspection hole cover with stiffening ribs made of thin grade 2 titanium sheet metal. The numerical simulation was carried out using the FEM method with PAMStamp 2G software. Numerical calculations were performed with consideration for the phenomenon of material strain hardening and anisotropy of plastic properties of the sheet metal formed. Properties of the grade 2 titanium alloy analysed in the simulations were adopted based on the results of the empirical studies. Adequate parameters of the forming process

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Haanappel, Sebastiaan P., Ulrich Sachs, Rene H. W. ten Thije, Bert Rietman, and Remko Akkerman. "Forming of Thermoplastic Composites." Key Engineering Materials 504-506 (February 2012): 237–42. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.237.

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Design and production guidelines for UD reinforced thermoplastic composites are highly desirable. Therefore, forming experiments and simulations with a realistic complex shaped product were conducted. Thermoforming experiments with quasi-isotropic UD carbon/PEEK and 8HS woven glass/PPS composites showed a clear difference in formability. Many wrinkles develop near doubly curved areas for the considered UD composites, whereas significant in-plane shear is observed for the woven composites. Forming prediction tools can be utilised to optimise the product design with respect to formability. A for

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Narowski, Przemysław, and Krzysztof Wilczyński. "A Global Approach to Modeling Injection Molding." Polymers 16, no. 1 (2024): 147. http://dx.doi.org/10.3390/polym16010147.

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A problem of modeling plastic injection forming (molding) is presented, including both the plasticizing system of the injection-forming machine and the mold. When modeling the plastic flow in the mold, the input quantities are essentially unknown, e.g., the plastic melt temperature. Thus, a comprehensive (global) model of the injection-forming process is needed for the flow in the plasticizing system and in the mold. The process output quantities from the plasticizing system will be the input quantities for the mold. When modeling the plastic flow in the injection-forming machine, a comprehens

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