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Journal articles on the topic '3D finite element'

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Author: Grafiati

Published: 4 June 2021

Last updated: 21 February 2023

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1

Chekmarev, Dmitry, and Yasser Abu Dawwas. "Momentary finite element for elasticity 3D problems." MATEC Web of Conferences 362 (2022): 01006. http://dx.doi.org/10.1051/matecconf/202236201006.

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A description of a new 8-node finite element in the form of a hexahedron is given for solving elasticity 3D problems. This finite element has the following features. This is a linear approximation of functions in the element, one point of integration and taking into account the moments of forces in the element. The finite element is based on “rare mesh” FEM schemes—finite element schemes in the form of n-dimensional cubes (square, cube, etc.) with templates in the form of inscribed simplexes (triangle, tetrahedron, etc.). Among the rare mesh schemes, schemes in 3-dimensional and 7-dimensional spaces are successful, in which the simplex can be arranged symmetrically with respect to the center of the n-dimensional cube. The rare mesh FEM schemes have not the hourglass instability due to the fact that the template of the finite element operator has the form of a simplex. Compared to traditional linear finite elements in the form of a simplex, rare mesh schemes are more economical and converge better, since they do not have the effect of overestimated shear stiffness. Moment FEM schemes are constructed by rare mesh schemes higher dimensional projection, respectively, on a two-dimensional or three-dimensional finite element mesh. The resulting finite elements are close to the known polylinear elements and surpass them in efficiency. The schemes contain parameters that allow you to control the convergence of numerical solutions. The possibility of applying this approach to the construction of numerical schemes for solving other problems of mathematical physics is discussed.

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2

Silva, L., C. Gruau, J. F. Agassant, T. Coupez, and J. Mauffrey. "Advanced Finite Element 3D Injection Molding." International Polymer Processing 20, no. 3 (September 2005): 265–73. http://dx.doi.org/10.3139/217.1888.

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3

Berry, K. J. "Parametric 3D finite-element mesh generation." Computers & Structures 33, no. 4 (January 1989): 969–76. http://dx.doi.org/10.1016/0045-7949(89)90431-8.

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4

Kadhim, Kadhim Naief. "Finite Element Analysis of Cellular Cofferdam by Using Flow 3D Program." Journal of Advanced Research in Dynamical and Control Systems 12, SP4 (March 31, 2020): 348–54. http://dx.doi.org/10.5373/jardcs/v12sp4/20201498.

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5

Warad, Nilesh, Janardhan Rao, Kedar Kulkarni, Avinash Dandekar, Manoj Salgar, and Malhar Kulkarni. "Finite Element Analysis Methodology for Additive Manufactured Tooling Components." International Journal of Engineering and Technology 14, no. 4 (November 2022): 56–61. http://dx.doi.org/10.7763/ijet.2022.v14.1202.

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Fused deposition modeling (FDM) for additive manufacturing is constantly growing as an innovative process across the industry in areas of prototyping, tooling, and production parts across most manufacturing industry verticals such as Aerospace, Automotive, Agricultural, Healthcare, etc. One such application that is widely used is for tooling on the shop floor e.g. for pick-off tools, assembly fixtures etc. For tooling applications printing the solid fill component with +45/- 45 raster is common practice. There is a requirement for finite element analysis to validate the strength of 3D printed components for some specific applications in tooling, but due to the anisotropic behavior of 3D printed parts and the unavailability of all mechanical properties FE analysis of 3D printed parts is sometimes challenging. Advance approaches like multiscale modeling approach requires specialized & costly analytical tools. So, to understand the behavior of additively manufactured parts the team has conducted a few tests and compared the results. In this work, solid-filled dog-bone tensile test and three-point bending test specimens were printed with +45/-45 raster orientation and tested in the lab. Tensile test specimens were built with flat, on-edge, and up-right orientations and tested to determine the directional properties of young’s modulus. Using mechanical properties from the tension test 3 points bending test is simulated in FE software- ANSYS. The FE modeling was done in two ways, in first model orthotropic properties were assigned to the specimen, and for second model isotropic properties were assigned. For isotropic modeling least value of young’s modulus is used. Simulation results of three-point bending test shows that in the linear region of force-deflection curve, deformation values from FE model with both orthotropic and isotropic modeling are in good agreement with the experimental results. Also, the difference in stress results between isotropic and orthotropic FE model is almost negligible. To support this observation, study is performed for various conditions. The specimens were printed with ABS material on Ultimaker® and ASA material on Stratasys® Fortus 360mc™ machine with T12, T16 and T20 nozzle settings. Study shows, for tooling applications if the 3D printed solid-filled components are designed with a certain factor of safety then validating its strength with isotropic material properties will give acceptable results. The advantage of this approach is getting the isotropic mechanical properties is easy and modeling with FE modeling will be simple.

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6

Peng, Rui Tao, Fang Lu, Xin Zi Tang, and Yuan Qiang Tan. "3D Finite Element Analysis of Prestressed Cutting." Advanced Materials Research 591-593 (November 2012): 766–70. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.766.

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In order to reveal the adjustment principle of prestressed cutting on the residual stress of hardened bearing steel GCr15, a three-dimensional thermal elastic-viscoplastic finite element model was developed using an Arbitrary Lagrangian Eulerian (ALE) formulation. Several key simulation techniques including the material constitutive model, constitutive damage law and contact with friction were discussed, simulation of chip formation during prestressed cutting was successfully conducted. At the prestresses of 0 MPa, 341 MPa and 568 MPa, distributions of residual stress on machined surface were simulated and experimentally verified. The results indicated that residual compressive stress on machined surface were achieved and actively adjusted by utilizing the prestressed cutting method; meanwhile, within the elastic limit of bearing steel material, the higher applied prestress leads to the more prominent compressive residual stress in the surface layer and subsequently the higher fatigue resistance of the part.

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7

Couturier, G., Claire Maurice, R. Fortunier, R. Doherty, and Julian H. Driver. "Finite Element Simulations of 3D Zener Pinning." Materials Science Forum 467-470 (October 2004): 1009–18. http://dx.doi.org/10.4028/www.scientific.net/msf.467-470.1009.

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An original model, based on a variational formulation for boundary motion by viscous drag, is developed to simulate single grain boundary motion and its interaction with particles. The equations are solved by a 3D finite element method to obtain the instantaneous velocity at each triangular element on the boundary surface, before, during and after contact with one or more particles. After validation by comparison with some simple, analytical and numerical cases, it is adapted to model curvature driven grain growth. For single phase material, the single grain boundary model closely matches the grain coarsening kinetics of a 3D multi boundary vertex model. In the presence of spherical incoherent particles the growth rate slows down to give a growth exponent of 2.5. When the boundary is anchored there is a significantly higher density, by a factor of 4, of particles on the boundary than the density predicted by the classic Zener analysis, and many particles exert less than this Zener drag force. As a result the Zener drag is increased by a factor of about 2.2. The limiting grain radius is compared with some experimental results.

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8

Sun, Da Wei, Kang Ping Wang, and Hui Qin Yao. "3D Finite Element Analysis on DongQing CFRD." Advanced Materials Research 255-260 (May 2011): 3478–81. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.3478.

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As a competitive dam style and full of life-force, the concrete- faced rockfill dam (CFRD) is widely used in China in recent years. Experts in China pointed out that “Extra high CFRD generally means those CFRDs with their heights higher than 150 m ” However, the history of construction and design of extra high CFRD is short and some problems during the construction of Extra high CFRD is still need to be explored. Therefore, stress and deformation characteristic of DongQing extra high CFRD was analyzed by 3D finite element method and some beneficial reference was obtained. Firstly, the advanced 3D mesh generation procedure written by Fortran language was used to form the finite element mesh which contained not only the dam with large amount of vertical joins and perimeric joints, but also the rock foundation and surrounding mountains. Moreover, the layer by layer construction procedure of dam was detail considered during 3D mesh generation. Since the node number of 3D mesh is still larger, large scales equations solving method-element by element method and others efficient measures were adopted. As the results, the computer calculation time decreased from former 48 hours to 20 minutes. According to the calculation results, the design scheme of DongQing CFRD was finally optimized.

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9

Yue, Cai Xu, Xian Li Liu, Dong Kai Jia, Shu Yi Ji, and Yuan Sheng Zhai. "3D Finite Element Simulation of Hard Turning." Advanced Materials Research 69-70 (May 2009): 11–15. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.11.

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A 3D model is established in this paper to simulate cutting process of PCBN tool cylindrical cutting hardened steel GCr15 using ABAQUS/Explicit. The model effectively overcomes serious element distortions and cell singularity in high strain domain caused by material large deformation by adopting shear failure criteria and element deletion criteria. In this study cutting force, cutting temperature, surface residual stress field as well as side flow are forecasted of hard cutting process with chamfering tool preparation. It shows that satisfactory results could be obtained by FEM. The simulation results provide theoretical basis for studying hard cutting mechanism and selecting the best cutting condition in practical.

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10

Mininger, X., N. Galopin, Y. Dennemont, and F. Bouillault. "3D finite element model for magnetoelectric sensors." European Physical Journal Applied Physics 52, no. 2 (October 21, 2010): 23303. http://dx.doi.org/10.1051/epjap/2010078.

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11

Tewari, Asim, Shashank Tiwari, Pinaki Biswas, S. Vijayalakshmi, and Raja K. Mishra. "Vectorized 3D microstructure for finite element simulations." Materials Characterization 61, no. 11 (November 2010): 1211–20. http://dx.doi.org/10.1016/j.matchar.2010.07.016.

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12

Macioł, Paweł, Przemysław Płaszewski, and Krzysztof Banaś. "3D finite element numerical integration on GPUs." Procedia Computer Science 1, no. 1 (May 2010): 1093–100. http://dx.doi.org/10.1016/j.procs.2010.04.121.

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13

Chakraborty, S., and B. Bhattacharyya. "An efficient 3D stochastic finite element method." International Journal of Solids and Structures 39, no. 9 (May 2002): 2465–75. http://dx.doi.org/10.1016/s0020-7683(02)00080-x.

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14

Murín, Justín, Vladimír Kutiš, Viktor Královič, and Tibor Sedlár. "3D Beam Finite Element Including Nonuniform Torsion." Procedia Engineering 48 (2012): 436–44. http://dx.doi.org/10.1016/j.proeng.2012.09.537.

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15

Tezduyar, T., S. Aliabadi, M. Behr, A. Johnson, and S. Mittal. "Parallel finite-element computation of 3D flows." Computer 26, no. 10 (October 1993): 27–36. http://dx.doi.org/10.1109/2.237441.

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16

Zhou, Rongxin, Zhenhuan Song, and Yong Lu. "3D mesoscale finite element modelling of concrete." Computers & Structures 192 (November 2017): 96–113. http://dx.doi.org/10.1016/j.compstruc.2017.07.009.

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17

Tillier, Y., C. Falcot, A. Paccini, G. Caputo, and J. L. Chenot. "3D finite element modelling of macular translocation." International Congress Series 1281 (May 2005): 467–72. http://dx.doi.org/10.1016/j.ics.2005.03.261.

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18

Marcinkowski, Leszek, Talal Rahman, and Jan Valdman. "A 3D Crouzeix-Raviart mortar finite element." Computing 86, no. 4 (October 7, 2009): 313–30. http://dx.doi.org/10.1007/s00607-009-0071-6.

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19

Zhang, Yongjie, Chandrajit Bajaj, and Bong-Soo Sohn. "3D finite element meshing from imaging data." Computer Methods in Applied Mechanics and Engineering 194, no. 48-49 (November 2005): 5083–106. http://dx.doi.org/10.1016/j.cma.2004.11.026.

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20

Sevilla, Ruben, Sonia Fernández-Méndez, and Antonio Huerta. "3D NURBS-enhanced finite element method (NEFEM)." International Journal for Numerical Methods in Engineering 88, no. 2 (March 1, 2011): 103–25. http://dx.doi.org/10.1002/nme.3164.

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21

Hlaváček, Ivan. "Domain optimization in $3D$-axisymmetric elliptic problems by dual finite element method." Applications of Mathematics 35, no. 3 (1990): 225–36. http://dx.doi.org/10.21136/am.1990.104407.

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22

JIANG, Z. Y. "3D FINITE ELEMENT MODELLING OF COMPLEX STRIP ROLLING." International Journal of Modern Physics B 22, no. 31n32 (December 30, 2008): 5850–56. http://dx.doi.org/10.1142/s0217979208051273.

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A main feature of complex strip - ribbed strip is the significant local residual deformation on a flat strip, resulting in the pulling down of rib height. The interesting issue in this paper shows a developed three-dimensional finite element model of the complex strip rolling, coupling the use of an extremely thin array of elements which is equivalent to the calculation of the additional shear deformation work rate occurred by the velocity discontinuity in the deformation zone. The 3D finite element modelling includes the consideration of the special rib inclined contact surface boundary condition has been carried out on a computer. An examination of the equivalent stress field, forward slip and rib height demonstrates the effectiveness of the developed model. The computed forward slip and rib height are in good agreement with the measured values. The effect of the rib inclined angle on the pulling down of rib height is also discussed.

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23

Abdullahi, Mustapha, and S. Oyadiji. "Acoustic Wave Propagation in Air-Filled Pipes Using Finite Element Analysis." Applied Sciences 8, no. 8 (August 7, 2018): 1318. http://dx.doi.org/10.3390/app8081318.

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The major objective of this work is to develop an efficient Finite Element Analysis (FEA) procedure to simulate wave propagation in air-filled pipes accurately. The development of such a simulation technique is essential in the study of wave propagation in pipe networks such as oil and gas pipelines and urban water distribution networks. While numerical analysis using FEA seems superficially straight forward, this paper demonstrates that the element type and refinement used for acoustic FEA have a significant effect on the accuracy of the result achieved and the efficiency of the computation. In particular, it is shown that the well-known, better overall performance achieved with 3D solid hexahedral elements in comparison with 2D-type elements in most stress and thermal applications does not occur with acoustic analysis. In this paper, FEA models were developed taking into account the influence of element type and sizes using 2D-like and 3D element formulations, as well as linear and quadratic nodal interpolations. Different mesh sizes, ranging from large to very small acoustic wavelengths, were considered. The simulation scheme was verified using the Time of Flight approach to derive the predicted acoustic wave velocity which was compared with the true acoustic wave velocity, based on the input bulk modulus and density of air. For finite element sizes of the same order as acoustic wavelengths which correspond to acoustic frequencies between 1 kHz and 1 MHz, the errors associated with the predictions based on the 3D solid hexahedral acoustic elements were mostly greater than 15%. However, for the same element sizes, the errors associated with the predictions based on the 2D-like axisymmetric solid acoustic elements were mostly less than 2%. This indicates that the 2D-like axisymmetric solid acoustic elements are much more efficient than the 3D hexahedral acoustic elements in predicting acoustic wave propagation in air-filled pipes, as they give higher accuracies and are less computationally intensive. In most stress and thermal FEA, the 3D solid hexahedral elements are much more efficient than 2D-type elements. However, for acoustic FEA, the results show that 2D-like axisymmetric elements are much more efficient than 3D solid hexahedral elements.

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24

Yoon, S. J., and S. M. Hwang. "3D Finite Element-based Study on Skin-pass Rolling - Part I : Finite Element Analysis." Transactions of Materials Processing 25, no. 2 (April 1, 2016): 130–35. http://dx.doi.org/10.5228/kstp.25.2.130.

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25

GARCÍA, MANUEL J., MIGUEL A. HENAO, and OSCAR E. RUIZ. "FIXED GRID FINITE ELEMENT ANALYSIS FOR 3D STRUCTURAL PROBLEMS." International Journal of Computational Methods 02, no. 04 (December 2005): 569–86. http://dx.doi.org/10.1142/s0219876205000582.

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Fixed Grid (FG) methodology was first introduced by García and Steven as an engine for numerical estimation of two-dimensional elasticity problems. The advantages of using FG are simplicity and speed at a permissible level of accuracy. Two-dimensional FG has been proved effective in approximating the strain and stress field with low requirements of time and computational resources. Moreover, FG has been used as the analytical kernel for different structural optimization methods as Evolutionary Structural Optimization, Genetic Algorithms (GA), and Evolutionary Strategies. FG consists of dividing the bounding box of the topology of an object into a set of equally sized cubic elements. Elements are assessed to be inside (I), outside (O) or neither inside nor outside (NIO) of the object. Different material properties assigned to the inside and outside medium transform the problem into a multi-material elasticity problem. As a result of the subdivision NIO elements have non-continuous properties. They can be approximated in different ways which range from simple setting of NIO elements as O to complex non-continuous domain integration. If homogeneously averaged material properties are used to approximate the NIO element, the element stiffness matrix can be computed as a factor of a standard stiffness matrix thus reducing the computational cost of creating the global stiffness matrix. An additional advantage of FG is found when accomplishing re-analysis, since there is no need to recompute the whole stiffness matrix when the geometry changes. This article presents CAD to FG conversion and the stiffness matrix computation based on non-continuous elements. In addition inclusion/exclusion of O elements in the global stiffness matrix is studied. Preliminary results shown that non-continuous NIO elements improve the accuracy of the results with considerable savings in time. Numerical examples are presented to illustrate the possibilities of the method.

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26

Patil, V. A., V. A. Sawant, and Kousik Deb. "3D Finite-Element Dynamic Analysis of Rigid Pavement Using Infinite Elements." International Journal of Geomechanics 13, no. 5 (October 2013): 533–44. http://dx.doi.org/10.1061/(asce)gm.1943-5622.0000255.

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27

He, Yinnian. "Finite Element Iterative Methods for the 3D Steady Navier--Stokes Equations." Entropy 23, no. 12 (December 9, 2021): 1659. http://dx.doi.org/10.3390/e23121659.

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In this work, a finite element (FE) method is discussed for the 3D steady Navier–Stokes equations by using the finite element pair Xh×Mh. The method consists of transmitting the finite element solution (uh,ph) of the 3D steady Navier–Stokes equations into the finite element solution pairs (uhn,phn) based on the finite element space pair Xh×Mh of the 3D steady linearized Navier–Stokes equations by using the Stokes, Newton and Oseen iterative methods, where the finite element space pair Xh×Mh satisfies the discrete inf-sup condition in a 3D domain Ω. Here, we present the weak formulations of the FE method for solving the 3D steady Stokes, Newton and Oseen iterative equations, provide the existence and uniqueness of the FE solution (uhn,phn) of the 3D steady Stokes, Newton and Oseen iterative equations, and deduce the convergence with respect to (σ,h) of the FE solution (uhn,phn) to the exact solution (u,p) of the 3D steady Navier–Stokes equations in the H1−L2 norm. Finally, we also give the convergence order with respect to (σ,h) of the FE velocity uhn to the exact velocity u of the 3D steady Navier–Stokes equations in the L2 norm.

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28

Zhang, M. X., S. L. Zhang, J. M. Peng, and A. A. Javadi. "Strength and Interaction of Soil Reinforced with Three-Dimensional Elements." Key Engineering Materials 340-341 (June 2007): 1285–90. http://dx.doi.org/10.4028/www.scientific.net/kem.340-341.1285.

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For conventional reinforced soil, the reinforcements are put horizontally in the soil. A new concept of soil reinforced with three-dimensional elements was proposed. In 3D reinforced soil, besides conventional horizontal reinforcements, some vertical and 3D reinforcements can also be laid in the soil. The triaxial tests on sand reinforced with 3D reinforcement were carried out. From the experimental results, the differences of stress-strain relationship and shear strength between horizontal reinforced sand and 3D reinforced one were analyzed. The experimental results show that 3D reinforcement not only increases its cohesion, the angle of internal friction has been increased greatly, especially with 3D elements on both sides. Based on experimental results, a retaining structure reinforced with 3D reinforcements was analyzed by the finite element method. The stress distribution and interaction between 3D elements and soil were studied. The plastic zone and stability analysis of the retaining structure reinforced with 3D reinforcements were investigated by finite element method by shear strength reduction technique.

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29

CHAPELLE, D., A. FERENT, and K. J. BATHE. "3D-SHELL ELEMENTS AND THEIR UNDERLYING MATHEMATICAL MODEL." Mathematical Models and Methods in Applied Sciences 14, no. 01 (January 2004): 105–42. http://dx.doi.org/10.1142/s0218202504003179.

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We focus on a family of shell elements which are a direct generalization of the shell elements most commonly used in engineering practice. The elements in the family include the effects of the through-the-thickness normal stress and can be employed to couple directly with surrounding media on either surfaces of the shell. We establish the "underlying" mathematical model of the shell discretization scheme, and we show that this mathematical model features the same asymptotic behaviors — when the shell thickness becomes increasingly smaller — as classical shell models. The question of "locking" of the finite element discretization is also briefly addressed and we point out that, for an effective finite element scheme, the MITC approach of interpolation is available.

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30

Gerber, Johan, Kim Jenkins, and Francois Engelbrecht. "FEM SEAL-3D: development of 3D finite element chip seal models." International Journal of Pavement Engineering 21, no. 2 (March 2, 2018): 134–43. http://dx.doi.org/10.1080/10298436.2018.1445250.

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31

Kojic, Milos. "MULTISCALE COMPOSITE 3D FINITE ELEMENT FOR LUNG MECHANICS." Journal of the Serbian Society for Computational Mechanics 14, no. 1 (June 30, 2020): 1–11. http://dx.doi.org/10.24874/jsscm.2020.14.01.01.

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The lungs are the pair of organs where very complex internal microstructure provides gas exchange as the vital process of living organisms. This exchange in humans occurs within only 300g of tissue but on the surface of millions of alveoli with the total surface area of around 130m2. The extremely complex microstructure consists of micron-size interconnected channels and alveoli, which significantly change the size during breathing and remain open. These conditions are maintained due to existence of two mechanical systems â€“ one external and the other internal, which act in the opposite sense, so that the lung behaves as a tensegrity system. Many computational models, with various degrees of simplifications and sophistication have been introduced. However, this task remains a challenge. We here introduce a 3D multi-scale composite FE for mechanics of lung tissue (MSCL). The model can be further used in generating computational models for mechanics for the entire lung and coupling to airflow.

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32

Deslaef, David, Emmanuelle Rouhaud, and Shabnam Rasouli-Yazdi. "3D Finite Element Models of Shot Peening Processes." Materials Science Forum 347-349 (May 2000): 241–46. http://dx.doi.org/10.4028/www.scientific.net/msf.347-349.241.

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33

Lafage, V., J. Dubousset, F. Lavaste, and W. Skalli. "3D finite element simulation of Cotrel–Dubousset correction." Computer Aided Surgery 9, no. 1-2 (January 2004): 17–25. http://dx.doi.org/10.3109/10929080400006390.

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34

Efrati, Ron, and Dan Givoli. "Hybrid 3D-plane finite element modeling for elastodynamics." Finite Elements in Analysis and Design 210 (November 2022): 103812. http://dx.doi.org/10.1016/j.finel.2022.103812.

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35

Kondrachuk, Alexander V. "Finite element modeling of the 3D otolith structure." Journal of Vestibular Research 11, no. 1 (February 1, 2001): 13–32. http://dx.doi.org/10.3233/ves-2001-11103.

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A 3D finite element model (FEM) of the mammalian utricular otolith corresponding to spatial structure, shape and size of the otolith from the guinea pig was developed. The otolithic membrane (OM) was considered as consisting of gel and otoconial layers. The macular surface was approximated as a plane. The deformation of the OM under static loads such as gravity and the change of endolymphatic pressure was analyzed using the FEM for different mechanical parameters of the OM and for different gravity vector orientations. The analytical dependence of OM displacements caused by the acceleration parallel to the macular plane was obtained. By comparison of the results of calculations with the known experimental data Young’s modulus of the gel layer was estimated to be of order of 10 N/m 2 . It was shown that static loads result in 3D local otolith displacements inhomogeneously distributed along the macular surface and across otolith thickness. Their distribution depends on the geometrical and mechanical parameters of the otolith components. The influences of the finite size of the OM, the Young’s modulus, Poisson’s ratio and thickness of the gel layer on the local displacements distribution of the OM were analyzed. The results of simulation suggest that: a) the Young’s modulus of the thin lowest part of the gel layer adjacent to the macular surface is much smaller than that of the rest of the OM; b) the structure of the border is designed to reduce the spatial inhomogeneity of the gel layer displacement; c) a change of the endolymphatic pressure may result in significant deformation of the OM.

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36

Lura, P., G. A. Plizzari, and P. Riva. "3D finite-element modelling of splitting crack propagation." Magazine of Concrete Research 54, no. 6 (December 2002): 481–93. http://dx.doi.org/10.1680/macr.2002.54.6.481.

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37

Lura, P., G. A. Plizzari, and P. Riva. "3D finite-element modelling of splitting crack propagation." Magazine of Concrete Research 54, no. 6 (December 2002): 481–93. http://dx.doi.org/10.1680/macr.54.6.481.38825.

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38

Liu, Yi, Ji Shun Li, and Bao Lian Wang. "3D Finite Element Simulation on During Shield Tunneling." Applied Mechanics and Materials 90-93 (September 2011): 1950–55. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.1950.

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Based on the comprehensive analysis on the primary components of ground movement associated with earth pressure balance (EPB) shield tunneling, a three-dimensional nonlinear finite element model for simulating EPB shield tunneling is proposed. The proposed modeling techniques are applied to simulate a tunneling project. The distributions of soil displacement on the ground surface associated with the advance-ment process of shield tunnel are analyzed. According to the comparisons of numerical results with field measurements, the proposed numerical procedure is found to be an effective approach for predicting the deformation dun to shield tunneling. The further analysis shows that the computed results of the small-strain constitutive model are more reasonable, and the small-strain mechanical behaviors of soils should be taken into account

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39

Koyamada, K., and T. Nishio. "Volume visualization of 3D finite element method results." IBM Journal of Research and Development 35, no. 1.2 (January 1991): 12–25. http://dx.doi.org/10.1147/rd.351.0012.

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40

Wang, J. S., and N. Ida. "3D finite element calculation of harmonic electromagnetic fields." IEEE Transactions on Magnetics 26, no. 2 (March 1990): 654–57. http://dx.doi.org/10.1109/20.106402.

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Preis, K., I. Bardi, O. Biro, C. Magele, G. Vrisk, and K. R. Richter. "Different finite element formulations of 3D magnetostatic fields." IEEE Transactions on Magnetics 28, no. 2 (March 1992): 1056–59. http://dx.doi.org/10.1109/20.123863.

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Kong, X., O. Asserin, S. Gounand, P. Gilles, J. M. Bergheau, and M. Medale. "3D finite element simulation of TIG weld pool." IOP Conference Series: Materials Science and Engineering 33 (July 3, 2012): 012025. http://dx.doi.org/10.1088/1757-899x/33/1/012025.

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Mackerle, Jaroslav. "2D and 3D finite element meshing and remeshing." Engineering Computations 18, no. 8 (December 2001): 1108–97. http://dx.doi.org/10.1108/eum0000000006495.

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Aurich, J. C., and H. Bil. "3D Finite Element Modelling of Segmented Chip Formation." CIRP Annals 55, no. 1 (2006): 47–50. http://dx.doi.org/10.1016/s0007-8506(07)60363-1.

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Shen, H., and C. J. Lissenden. "3D finite element analysis of particle-reinforced aluminum." Materials Science and Engineering: A 338, no. 1-2 (December 2002): 271–81. http://dx.doi.org/10.1016/s0921-5093(02)00094-1.

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V., Lafage, Dubousset J., Lavaste F., and Skalli W. "3D finite element simulation of Cotrel-Dubousset correction." Computer Aided Surgery 9, no. 1-2 (January 1, 2004): 17–25. http://dx.doi.org/10.1080/10929080400006390.

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Gao, Yifan, Jeong Hoon Ko, and Heow Pueh Lee. "3D Eulerian Finite Element Modelling of End Milling." Procedia CIRP 77 (2018): 159–62. http://dx.doi.org/10.1016/j.procir.2018.08.265.

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Hayashi, Ken, Koike Takuji, Sho Kanzaki, and Kaoru Ogawa. "R441 – 3D Finite Element Model for Perilymphatic Fistula." Otolaryngology–Head and Neck Surgery 139, no. 2_suppl (August 2008): P192. http://dx.doi.org/10.1016/j.otohns.2008.05.597.

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Abstract:

Problem To investigate the relationship between the intrusion of the air bubble into the scala vestibli and hearing loss at low frequencies. Methods The effect of intrusion of an air bubble into the scala vestibuli on auditory activity was analyzed based on clinical data and using a three-dimensional finite element (FE) model of the human cochlea. The FE model consists of the stapes, the stapedial annular ligament, the oval window, vestibule, lymph, basilar membrane, osseous spiral lamina, and the cochlear aqueduct. An air bubble in the scala vestibuli was modeled as a small fistula opened on the bony wall of the cochlea. The induced vibration of the lymph and the basilar membrane was calculated by changing the position of the air bubble using CFD-ACE software. Results A traversing wave was generated on the basilar membrane of the intact cochlear model by vibrating the stapes. Even if the air bubble existed in the scala vestibuli, the traversing wave was also generated. When the air bubble existed at the second turn of the cochlea, an envelope of the traversing wave had a notch at the portion where the air bubble existed. The ratio of the maximum amplitude of the basilar membrane in the cochlea with the air bubble to that in the intact cochlea decreased with decreasing frequency. The maximum amplitude of the traversing wave in the cochlea with the air bubble was smaller than that in the intact cochlea by 20 dB at 500 Hz. This result is consistent with clinical data. Conclusion Our results suggest that the intrusion of an air bubble into the scala vestibuli causes hearing loss at low frequencies. Significance The removal of air bubbles into the scala vestibli is needed for hearing improvement.

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Asenov, A., J. R. Barker, A. R. Brown, and G. L. Lee. "Scalable parallel 3D finite element nonlinear poisson solver." Simulation Practice and Theory 4, no. 2-3 (May 1996): 155–68. http://dx.doi.org/10.1016/0928-4869(95)00025-9.

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Kim, Meung Jung. "3D finite element analysis of evaporative laser cutting." Applied Mathematical Modelling 29, no. 10 (October 2005): 938–54. http://dx.doi.org/10.1016/j.apm.2005.02.015.

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