Статті в журналах: "FEA 3-D"

1

Yamaguchi, Tadashi, Yoshihiro Kawase, and Shota Ishimura. "3-D adaptive FEA with weighted node density technique." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 5 (July 15, 2020): 1201–13. http://dx.doi.org/10.1108/compel-01-2020-0005.

Повний текст джерела

Анотація:

Purpose This paper aims to propose a method to create 3-D finite element meshes automatically using the Delaunay tetrahedralization with the weighted node density technique. Using this method, the adaptive finite element analysis (FEA) was carried out for the calculation of the magnetic field of an eddy current verification model to clarify the usefulness of the method. Moreover, the error evaluation function for the adaptive FEA was also discussed. Design/methodology/approach The method to create the 3-D finite element meshes using the Delaunay tetrahedralization is realized by the weighted node density technique, and Zienkiewicz-Zhu’s error estimator is used as the error evaluation function of the adaptive FEA. Findings The magnetic flux density vectors on the node in the error evaluation function for the adaptive FEA should be calculated with the weighted average by the reciprocal of the volume of elements. Originality/value This paper describes the method to create 3-D finite element meshes and the comparison among calculation methods of the magnetic flux density vectors on the node for the error estimator.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Arslan, Mehmet Ali, and Oğuz Kayabaşı. "3-D Rail–Wheel contact analysis using FEA." Advances in Engineering Software 45, no. 1 (March 2012): 325–31. http://dx.doi.org/10.1016/j.advengsoft.2011.10.009.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Ahmad, Hilton. "Stress Distribution in Composite Double-Lap Bolted Joints Incorporating with Clamp-Up." Applied Mechanics and Materials 660 (October 2014): 152–56. http://dx.doi.org/10.4028/www.scientific.net/amm.660.152.

Повний текст джерела

Анотація:

A 3-D FEA has been carried out to determine the stress distribution in bolted double-lap bolted joints using ABAQUS CAE and compared with available closed-form equations. As friction load in bolted joint is transferred through-the-thickness, the 3-D finite element model gave more reliable stress distribution than simplistic 2-D closed form (incorporated with clamp-up). Similar trend in stress distribution were found for closed-form and FEA approaches.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Cheng, Bo, and Guang Pan. "Analysis and Structure Optimization of Radial Halbach Permanent Magnet Couplings for Deep Sea Robots." Mathematical Problems in Engineering 2018 (September 12, 2018): 1–11. http://dx.doi.org/10.1155/2018/7627326.

Повний текст джерела

Анотація:

Permanent magnet couplings (PMCs) can convert the dynamic seal of transmission shaft into a static seal, which will significantly improve the transmission efficiency and reliability. Therefore, the radial Halbach PMC in this paper is suitable as the transmission mechanism of deep sea robots. A two-segment Halbach array is adopted in the radial PMC, and the segment arc coefficient can be adjustable. This paper presents the general analytical solutions of the distinctive Halbach PMCs based on scalar magnetic potential and Maxwell stress tensor. The analytical solutions of magnetic field are in good agreement with 2-D finite element analysis (FEA) results. In addition, an initial prototype of the radial Halbach PMC has been fabricated, and the analytical solutions of magnetic torque are compared with 3-D FEA and experiment results. This paper also establishes an optimization procedure for PMCs based on the combination of 3-D FEA, Back Propagation Neural Network (BPNN), and Genetic Algorithm (GA). 3-D FEA is performed to calculate the pull-out torque of the samples from Latin hypercube sampling, then BPNN is used to describe the relationship between the optimization variables and pull-out torque. Finally, GA is applied to solve the optimization problem, and the optimized scheme is proved to be more reasonable with the FEA method.

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Jones, D. P., J. L. Gordon, D. N. Hutula, J. E. Holliday, and W. G. Jandrasits. "Application of Equivalent Elastic Methods in Three-Dimensional Finite Element Structural Analysis." Journal of Pressure Vessel Technology 121, no. 3 (August 1, 1999): 283–90. http://dx.doi.org/10.1115/1.2883704.

Повний текст джерела

Анотація:

This paper describes use of equivalent solid (EQS) modeling to obtain efficient solutions to perforated material problems using three-dimensional finite element analysis (3-D-FEA) programs. It is shown that EQS modeling in 3-D-FEA requires an EQS constitutive relationship with a sufficient number of independent constants to allow the EQS material to respond according to the elastic symmetry of the penetration pattern. It is also shown that a 3-D-FEA submodel approach to calculate peak stresses and ligament stresses from EQS results is very accurate and preferred over more traditional stress multiplier approaches. The method is demonstrated on the problem of a transversely pressurized simply supported plate with a central divider lane separating two perforated regions with circular penetrations arranged in a square pattern. A 3-D-FEA solution for a model that incorporates each penetration explicitly is used for comparison with results from an EQS solution for the plate. Results for deflection and stresses from the EQS solution are within 3 percent of results from the explicit 3-D-FE model. A solution to the sample problem is also provided using the procedures in the ASME B&PV Code. The ASME B&PV Code formulas for plate deflection were shown to overestimate the stiffening effects of the divider lane and the outer stiffening ring.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Benmessaoud, Youcef, Frédéric Dubas, and Mickael Hilairet. "Combining the Magnetic Equivalent Circuit and Maxwell–Fourier Method for Eddy-Current Loss Calculation." Mathematical and Computational Applications 24, no. 2 (June 4, 2019): 60. http://dx.doi.org/10.3390/mca24020060.

Повний текст джерела

Анотація:

In this paper, a hybrid model in Cartesian coordinates combining a two-dimensional (2-D) generic magnetic equivalent circuit (MEC) with a 2-D analytical model based on the Maxwell–Fourier method (i.e., the formal resolution of Maxwell’s equations by using the separation of variables method and the Fourier’s series) is developed. This model coupling has been applied to a U-cored static electromagnetic device. The main objective is to compute the magnetic field behavior in massive conductive parts (e.g., aluminum, magnets, copper, iron) considering the skin effect (i.e., with the eddy-current reaction field) and to predict the eddy-current losses. The magnetic field distribution for various models is validated with 2-D and three-dimensional (3-D) finite-element analysis (FEA). The study is also focused on the discretization influence of 2-D generic MEC on the eddy-current loss calculation in conductive regions. Experimental tests and 3-D FEA have been compared with the proposed approach on massive conductive parts in aluminum. For an operating point, the computation time is divided by ~4.6 with respect to 3-D FEA.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Yokoyama, T., V. Cingoski, K. Kaneda, and H. Yamashita. "3-D automatic mesh generation for FEA using dynamic bubble system." IEEE Transactions on Magnetics 35, no. 3 (May 1999): 1318–21. http://dx.doi.org/10.1109/20.767204.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Liu, Sha, Jian Fu Zhang, Ping Fa Feng, Ding Wen Yu, and Zhi Jun Wu. "Determination of Constitutive Equation Parameters for Face Milling 3-D Simulation via Pressure Bar and Orthogonal Cutting Tests." Materials Science Forum 723 (June 2012): 136–42. http://dx.doi.org/10.4028/www.scientific.net/msf.723.136.

Повний текст джерела

Анотація:

Material constitutive equation plays an important role in Finite Element Analysis (FEA) of metal cutting process. This paper proposes a method to obtain parameters for Power Law model of a Japanese type of alloy steel (SCM440H) for 3-D FEA of face milling process, involving pressure bar experiments and orthogonal metal cutting experiments. Since pressure bar test cannot reach the high strain rate occurred in cutting process, orthogonal cutting experiment was combined to obtain parameters for material model. By this method, the ideal parameters for FEA of the face milling process were finally determined. Face milling experiments were performed to verify the accuracy of the model built.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Jiang, Tengfei, Chenglin Wu, Jay Im, Rui Huang, and Paul S. Ho. "Impact of Grain Structure and Material Properties on Via Extrusion in 3-D Interconnects." International Symposium on Microelectronics 2014, no. 1 (October 1, 2014): 000008–12. http://dx.doi.org/10.4071/isom-ta12.

Повний текст джерела

Анотація:

In this paper, the effects of Cu microstructure on the mechanical properties and extrusion of though-silicon vias (TSVs) were studied based on two types of TSVs with different microstructure. A direct correlation was found between the grain size and the mechanical properties of the vias. Both an analytical model and FEA were used to establish the relationship between the mechanical properties and via extrusion. The effect of via/Si interface on extrusion was also studied by FEA. The results suggest small and uniform grains in the Cu vias, as well as stronger interfaces between the via and Si led to smaller via extrusion, and are thus preferable for reduced via extrusion failure and improved TSV reliability.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Sha, Sha, Anqi Geng, Yuqin Gao, Bin Li, Xuewei Jiang, Hui Tao, Lei Luo, et al. "Review on the 3-D simulation for weft knitted fabric." Journal of Engineered Fibers and Fabrics 16 (January 2021): 155892502110125. http://dx.doi.org/10.1177/15589250211012527.

Повний текст джерела

Анотація:

There are different kinds of geometrical models and physical models used to simulate weft knitted fabrics nowadays, such as loop models based on Pierce, piecewise function, spline curve, mass-spring model, and finite element analyses (FEA). Weft knitting simulation technology, including modeling and yarn reality, has been widely adopted in fabric structure designing for the manufacturer. The technology has great potentials in both industries and dynamic virtual display. The present article is aimed to review the current development of 3-D simulation technique for weft knitted fabrics.

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Pang, J. H. L., and D. Y. R. Chong. "Flip chip on board solder joint reliability analysis using 2-D and 3-D FEA models." IEEE Transactions on Advanced Packaging 24, no. 2 (2001): 499–506. http://dx.doi.org/10.1109/6040.982836.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Xu, Chun, Clay J. Brinster, Arminder S. Jassar, Mathieu Vergnat, Thomas J. Eperjesi, Robert C. Gorman, Joseph H. Gorman, and Benjamin M. Jackson. "A novel approach to in vivo mitral valve stress analysis." American Journal of Physiology-Heart and Circulatory Physiology 299, no. 6 (December 2010): H1790—H1794. http://dx.doi.org/10.1152/ajpheart.00370.2010.

Повний текст джерела

Анотація:

Three-dimensional (3-D) echocardiography allows the generation of anatomically correct and time-resolved geometric mitral valve (MV) models. However, as imaged in vivo, the MV assumes its systolic geometric configuration only when loaded. Customarily, finite element analysis (FEA) is used to predict material stress and strain fields rendered by applying a load on an initially unloaded model. Therefore, this study endeavors to provide a framework for the application of in vivo MV geometry and FEA to MV physiology, pathophysiology, and surgical repair. We hypothesize that in vivo MV geometry can be reasonably used as a surrogate for the unloaded valve in computational (FEA) simulations, yielding reasonable and meaningful stress and strain magnitudes and distributions. Three experiments were undertaken to demonstrate that the MV leaflets are relatively nondeformed during systolic loading: 1) leaflet strain in vivo was measured using sonomicrometry in an ovine model, 2) hybrid models of normal human MVs as constructed using transesophageal real-time 3-D echocardiography (rt-3DE) were repeatedly loaded using FEA, and 3) serial rt-3DE images of normal human MVs were used to construct models at end diastole and end isovolumic contraction to detect any deformation during isovolumic contraction. The average linear strain associated with isovolumic contraction was 0.02 ± 0.01, measured in vivo with sonomicrometry. Repeated loading of the hybrid normal human MV demonstrated little change in stress or geometry: peak von Mises stress changed by <4% at all locations on the anterior and posterior leaflets. Finally, the in vivo human MV deformed minimally during isovolumic contraction, as measured by the mean absolute difference calculated over the surfaces of both leaflets between serial MV models: 0.53 ± 0.19 mm. FEA modeling of MV models derived from in vivo high-resolution truly 3-D imaging is reasonable and useful for stress prediction in MV pathologies and repairs.

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Choi, Byoung Ho, Dong Ho Joo, and Sam Hong Song. "Application of Finite Element Analysis for the Prediction of the Fatigue Lifetime of Spot Welds with Triple SPCC plates." Key Engineering Materials 345-346 (August 2007): 1453–56. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.1453.

Повний текст джерела

Анотація:

The fatigue characteristic of triple spot welded SPCC plates with the variation of the thickness and the geometry under tensile-shear loading is studied by finite element analysis (FEA) and the obtained data is compared with experimental data. Using 3-D solid element model and 3-D beam-shell model, the maximum equivalent stress and the beam deformation angle (BDA) for various thickness and geometry is studied. The linear relation between crack opening angle (COA) from experiment and the BDA from FEA for beam-shell model is represented, and the empirical prediction of fatigue lifetime is proposed using the relation between COA and BDA.

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Fan, Jian Jian, and Jian Hua Wu. "Torque Pulsation Minimization of Permanent Magnet Synchronous Motor Using the Taguchi Method." Advanced Materials Research 655-657 (January 2013): 491–95. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.491.

Повний текст джерела

Анотація:

The torque pulsation was minimized using the Taguchi methods in this paper. The analytical model of torque was derived by the energy method. The Taguchi optimization method was used to generate the experiment samples, which were calculated in 2-D and 3-D FEA. Three different parameters of PMSM, such as skew ratio, pole embrace and stator slot width were optimized. ANOVA was used to analysis the effect of different factors in Taguchi method. The superiority of the optimized PMSM was also verified further through FEA.

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Park, Hyun-Kyung, Eui-Hyang Sung, Young-Soo Cho, Sung-Seo Mo, Youn-Sic Chun, and Kee-Joon Lee. "3-D FEA on the intrusion of mandibular anterior segment using orthodontic miniscrews." Korean Journal of Orthodontics 41, no. 6 (2011): 384. http://dx.doi.org/10.4041/kjod.2011.41.6.384.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Vonesh, M. J., C. H. Cho, J. V. Pinto, B. J. Kane, D. S. Lee, S. I. Roth, K. B. Chandran, and D. D. McPherson. "Regional vascular mechanical properties by 3-D intravascular ultrasound with finite-element analysis." American Journal of Physiology-Heart and Circulatory Physiology 272, no. 1 (January 1, 1997): H425—H437. http://dx.doi.org/10.1152/ajpheart.1997.272.1.h425.

Повний текст джерела

Анотація:

A method employing intravascular ultrasound (IVUS) and simultaneous hemodynamic measurements, with resultant finite element analysis (FEA) of accurate three-dimensional IVUS reconstructions (3-DR), was developed to estimate the regional distribution of arterial elasticity. Human peripheral arterial specimens (iliac and femoral, n = 7) were collected postmortem and perfused at three static transmural pressures: 80, 120, and 160 mmHg. At each pressure, IVUS data were collected at 2.0-mm increments through a 20.0-mm segment and used to create an accurate 3-DR. Mechanical properties were determined over normotensive and hypertensive ranges. An FEA and optimization procedure was implemented in which the elemental elastic modulus was scaled to minimize the displacement error between the computer-predicted and actual deformations. The “optimized” elastic modulus (Eopt) represents an estimate of the component element material stiffness. A dimensionless variable (beta), quantifying structural stiffness, was computed. Eopt of nodiseased tissue regions (n = 80) was greater than atherosclerotic regions (n = 88) for both normotensive (Norm) and hypertensive (Hyp) pressurization: Norm, 9.3 +/- 0.98 vs. 3.5 +/- 0.30; Hyp, 11.3 +/- 0.72 vs. 8.5 +/- 0.47, respectively (mean +/- SE x 10(6) dyn/cm2; P < 0.01 vs. nondiseased). No differences in beta between nondiseased and atherosclerotic tissue were noted at Norm pressurization. With Hyp pressurization, beta of atherosclerotic regions were greater than nondiseased regions: 21.5 +/- 2.21 vs. 14.0 +/- 2.11, respectively (P < 0.03). This method provides a means to identify regional in vivo variations in mechanical properties of arterial tissue.

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Landgraf, Mathias C. "FEA on the Assembly Line." Mechanical Engineering 121, no. 06 (June 1, 1999): 66–67. http://dx.doi.org/10.1115/1.1999-jun-6.

Повний текст джерела

Анотація:

Structural and dynamic analyses of a new machining fixture help Porsche AG get production up and running faster. Porsche contracted with KTW Konstruktion Technik K. Weisshaupt GmbH of Friedrichshafen, Germany, to design and produce the fixtures required to hold automobile motor parts in place during drilling and high-precision milling. It has been noted that using a 3-D computer-aided design (CAD) solid modeler can point out weaknesses before a design leaves the computer. In order to avoid the need for costly generations of prototypes prior to the casting process, Speedy Engineering in Immenstaad, Germany, used finite element analysis software to perform linear static and dynamic (vibration) analyses of the motor component fixture geometry within only a few days of its design, to determine displacements and eigenfrequencies of the geometry. The results of the static and dynamic analyses enabled Speedy to specify maximum working loads for •production, which guaranteed success with the first use of this fixture design.

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Jiang, Dan, Ping Yang, and Ren Tian Ma. "3-D Stress Analysis of Pneumatic Pen Cylinder with Preload in Mounting Nut." Advanced Materials Research 335-336 (September 2011): 629–32. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.629.

Повний текст джерела

Анотація:

As a necessary component in pneumatic muscle, minimum switch and minimum mechanical hand, pen cylinder used as prime actuator possesses the characteristics of high speed actuation possible, easy installation, improved wear resistance and so on. The construction and working principle of the pen cylinder are introduced. Using 3-D stress field finite element analysis (FEA) method, the stress field distribution of pen cylinder with preload in mounting nut is analyzed. Simulation results are presented. The stress characteristics are compared between different preload in mounting nut and thickness of mounting bracket.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Lu, S. C., M. J. Saran, and R. A. Miller. "Integration of CAD and FEA for Concurrent Engineering Design of Sheet Stamping." Journal of Manufacturing Science and Engineering 118, no. 3 (August 1, 1996): 310–17. http://dx.doi.org/10.1115/1.2831030.

Повний текст джерела

Анотація:

The tedious process of building an input model and of manual communication between CAD and Finite Element Analysis (FEA) significantly restricts the designers from using FEA, particularly in preliminary design. Most of the previous works concentrate on expediting this process by interfacing CAD and FEA. This paper propose full integration of FEA simulation code within a CAD system, thus several problems are avoided. The section-based FEA is used as better suited to early design. It requires, comparing to the 3-D FEA, development of additional CAD functions to extract appropriate sections from the CAD model. The proposed integrated system allows for rapid use of the FEA and unifies the design environment to avoid inconsistency. It provides a mechanism to specify the part orientation relative to the punch traveling direction to support tipping. It also extracts the geometrical data of a specified section to automatically build and store a FEA input model. The numerical simulation of the process can be then performed without exiting the CAD system. Both existing as well as newly developed CAD functions, needed for the proposed integration system, are presented. The feasibility and advantages of such integration is demonstrated on the developed prototype system.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Rossi, L. N., V. C. Silva, L. B. Martinho, and J. R. Cardoso. "A Geometrical Approach of 3-D FEA for Educational Purposes Applied to Electrostatic Fields." IEEE Transactions on Magnetics 44, no. 6 (June 2008): 1674–77. http://dx.doi.org/10.1109/tmag.2007.916164.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Ye, Ding Kuan, Ling Yun Yan, Ying Quan Liu, and Yun Yue Ye. "Detent Force Analysis of Permanent Magnet Linear Synchronous Motor for Bearing Grinding Machine Application." Applied Mechanics and Materials 416-417 (September 2013): 390–94. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.390.

Повний текст джерела

Анотація:

The detent force of permanent magnet linear synchronous motor (PMLSM) leads to the thrust ripple, vibration and noise inbearing grinding machines, In order to overcome the negative effect, detent force needs to be decreased. Through theanalytical andfinite element methods, two main components of detent force are investigated in this paper. Firstly, finite element analysis (FEA) and fast Fourier transform (FFT) are employed to analyze the end force. Then athree dimensional (3-D) FEA model of a short secondary PMLSM with skewed poles is erected and the cogging force is studied.Compared with the two dimensional (2-D) model of PMLSM without skewed poles, the detent force is remarkably reduced.

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Yang, Chun Hui, Peter D. Hodgson, Qian Chu Liu, and Lin Ye. "Three-Dimensional Finite Element Modelling of Laser Shock Peening Process." Materials Science Forum 561-565 (October 2007): 2261–64. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.2261.

Повний текст джерела

Анотація:

Laser shock peening (LSP) is an innovative surface treatment technique for metal alloys, with the great improvement of their fatigue, corrosion and wear resistance performance. Finite element method has been widely applied to simulate the LSP to provide the theoretically predictive assessment and optimally parametric design. In the current work, 3-D numerical modelling approaches, combining the explicit dynamic analysis, static equilibrium analysis algorithms and different plasticity models for the high strain rate exceeding 106s-1, are further developed. To verify the proposed methods, 3-D static and dynamic FEA of AA7075-T7351 rods subject to two-sided laser shock peening are performed using the FEA package–ABAQUS. The dynamic and residual stress fields, shock wave propagation and surface deformation of the treated metal from different material modelling approaches have a good agreement.

Стилі APA, Harvard, Vancouver, ISO та ін.

23

He, Xiao Cong. "Stress Distribution of Bonded Joint with Rubbery Adhesives." Advanced Materials Research 189-193 (February 2011): 3427–30. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3427.

Повний текст джерела

Анотація:

This paper deals with the stress distribution in adhesively bonded joints with rubbery adhesives. The 3-D finite element analysis (FEA) software was used to model the joint and predict the stress distribution along the whole joint. The FEA results indicated that there are stress discontinuities existing in the stress distribution within the adhesive layer and adherends at the lower interface and the upper interface of the boded section for most of the stress components. The FEA results also show that the stress field in the whole joint is dominated by the normal stresses components S11, S33 and the shear stress component S13. The features and variations of these critical stresses components are discussed.

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Wang, Zhen, Xuejun Zhou, Fangshuai Wei, and Mingyang Li. "Performance of Special-Shaped Concrete-Filled Square Steel Tube Column under Axial Compression." Advances in Civil Engineering 2020 (July 27, 2020): 1–16. http://dx.doi.org/10.1155/2020/1763142.

Повний текст джерела

Анотація:

The axial compressive performance of novel L-shaped and T-shaped concrete-filled square steel tube (L/T-CFSST) column was assessed in this study. Ten L/T-CFSST columns were tested to failure under axial load. The experimental data were used to determine various failure modes, bearing capacities, and load-displacement curves. The test parameters included the section form, steel tube thickness, steel yield strength, and slenderness ratio. The axial compressive performance of the L/T-CFSST column proved favorable, and each square steel tube showed strong cooperative performance. The failure mode of the stub column specimen (H/D ≤ 3) was strength failure caused by local buckling of the steel tube and that of the medium-long column member (H/D > 3) was instability failure caused by overall bending of the specimen. A finite element analysis (FEA) model was established and successfully validated by comparison against the test results. Based on the FEA model, parametric analyses were conducted to investigate the effects of steel tube thickness, concrete strength, steel yield strength, and slenderness ratio. The ultimate loads obtained from the experiments and FEA were compared to the results calculated by the available design codes. A formula was established to calculate the axial compressive strength and stability bearing capacity of the L/T-CFSST column accordingly. The calculation results are in close agreement with the FEA and experimental results, and the proposed formula may provide a workable reference for practicing engineers.

Стилі APA, Harvard, Vancouver, ISO та ін.

25

He, Xiao Cong. "Stress Discontinuities in Normal Stress Distribution of Adhesively Bonded Beams." Advanced Materials Research 772 (September 2013): 140–43. http://dx.doi.org/10.4028/www.scientific.net/amr.772.140.

Повний текст джерела

Анотація:

This paper deals with the stress discontinuities in normal stress distribution of adhesively bonded beams. The 3-D finite element analysis (FEA) software was used to model the beams and predict the normal stress distribution along the whole beam. The FEA results indicated that there are stress discontinuities existing in the normal stress distribution within adhesive layer and adherends at the lower interface and the upper interface of the boded section. The numerical values of the normal stress concentration at key locations of the beams and the stress concentration ratio are discussed.

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Jung, Jae-Woo, Byeong-Hwa Lee, Kyu-Seob Kim, and Sung-Il Kim. "Interior Permanent Magnet Synchronous Motor Design for Eddy Current Loss Reduction in Permanent Magnets to Prevent Irreversible Demagnetization." Energies 13, no. 19 (September 29, 2020): 5082. http://dx.doi.org/10.3390/en13195082.

Повний текст джерела

Анотація:

We designed and analyzed an interior permanent magnet synchronous motor (IPMSM) to prevent irreversible demagnetization of the permanent magnets (PMs). Irreversible demagnetization of NdFeB PMs mainly occurs due to high temperature, which should thus be minimized. Therefore, it is necessary to reduce the eddy current loss in the PM through optimal design. The shape of the rotor core was optimized using finite element analysis (FEA) and response surface methodology. Three-dimensional (3-D) FEA is required for accurate computation of the eddy current loss, but there is huge time, effort, and cost consumption. Therefore, a method is proposed for indirectly calculating the eddy current loss of PMs using 2-D FEA. A thermal equivalent circuit analysis was used to calculate the PM temperature of the optimized model. For the thermal analysis, the copper loss, core loss, and eddy current loss in PMs were estimated and applied as a heat source. Based on the results, we confirmed the stability of the optimum model in terms of the PM demagnetization.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Stoica, Constantin-Romica, Raluca Maier, Anca-Mihaela Istrate, Sebastian-Gabriel Bucaciuc, and Alexandra Despa. "Impact Behavior Analysis of 3-D Printed Honeycomb Structures." Materiale Plastice 59, no. 3 (October 3, 2022): 78–90. http://dx.doi.org/10.37358/mp.22.3.5607.

Повний текст джерела

Анотація:

The purpose of this paper is to evaluate the behaviour of 3D printed honeycomb structures under low velocity impact loading for their use in energy absorption applications. Additive manufacturing technologies are part of a growing field that represents high interest for industries such as aerospace, automotive and naval. This paper aims to determine the mechanical properties of a 3D printed polymer - Polylactic Acid (PLA) manufactured by FDM (Fused Deposition Modelling) technology. In this regard, first the material is characterized by low velocity impact dynamic experimental tests. A finite Element Analysis (FEA) is performed in LS-Dyna software in order to validate the results. The samples were manufactured by varying the infill percent to investigate the influence of different parameters on a batch of samples for every configuration. The 3D CAD modelling for impact tests samples were performed in Catia V5. Among wide range of cellular structures, honeycomb non-auxetic hexagonal cell pattern was selected in this study, assuring high strength/weight ratio. The amount of energy absorbed during the impact, the failure and degradation of the impacted specimens were monitored, following the analysis of experimental and numerical data. A fair agreement was obtained between experimental and numerical results, showing that honeycomb developed lightweight structures exhibits a proper energy absorption capacity, with a mechanism of release similar to metal or composite materials honeycombs.

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Yang, Guohui, and Chengning Zhang. "Computationally Efficient PM Power Loss Mapping for PWM Drive Surface-Mounted Permanent Magnet Synchronous Machines." Applied Sciences 11, no. 7 (April 5, 2021): 3246. http://dx.doi.org/10.3390/app11073246.

Повний текст джерела

Анотація:

This paper proposes a computationally efficient approach for mapping permanent magnet (PM) power loss in permanent magnet synchronous machines (PMSMs). The PM loss mapping method here uses time-step finite element analysis (FEA) to determine the function parameters representing the loss variation with speed (frequency), amplitude modulation ratio, carrier ratio, and stator current and is suitable for rapid evaluation of machine performance over the entire torque–speed envelope. The PM loss can be accurately mapped across the full operational envelope, including the field-weakened mode. The loss mapping procedure takes into account the equivalent resistivity of axial segmentation of the PM array calculated by three-dimensional (3-D) FEA. The effect of temperature on the PM loss is also considered. The proposed methodology is validated on two surface-mounted PMSM designs. The results of the loss mapping procedure are consistent with those from direct 3-D finite element prediction and experimental results of PM power loss at each operating point of the machine.

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Samborski, Sylwester, Wojciech Smagowski, Andrzej Teter, and Marek Chodurski. "Application of 3-D Laser Scanning Vibrometer in Determination of Free Vibration Frequencies of Composite Plates with Damage." Solid State Phenomena 240 (August 2015): 42–48. http://dx.doi.org/10.4028/www.scientific.net/ssp.240.42.

Повний текст джерела

Анотація:

The paper deals with experimental estimation of the frequencies of free vibrations for composite plates with damage. Two different glass-epoxy composite plates with damage were tested and their mechanical behavior was compared with their non-damaged counterparts. Dynamical properties of the tested structures were examined with the Laser Scanning Vibrometer. Finite Element Analysis (FEA) was performed simultaneously for free vibration frequencies and mode shapes. The numerical results agreed well with the experiment.

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Mlot, Adrian, Marian Łukaniszyn, and Mariusz Korkosz. "Magnet loss analysis for a high-speed PM machine with segmented PM and modified tooth-tips shape." Archives of Electrical Engineering 65, no. 4 (December 1, 2016): 671–83. http://dx.doi.org/10.1515/aee-2016-0047.

Повний текст джерела

Анотація:

Abstract This paper presents the loss-oriented performance analysis of a radial highspeed permanent magnet (PM) machine with concentrated windings for automotive application. The PM synchronous machine was designed for an operating frequency up to 800 Hz. The main aim of this paper is to analyse the selected methods for magnet eddycurrent loss reduction. The first approach to rotor modification regards magnet segmentation in circumferential and axial directions. The second approach is based on changes in tooth-tips shape of the stator. The best variants of tooth-tip shapes are determined for further investigation, and adopted with a rotor having magnet segmentation. It is found that the machine with a segmented magnet leads to magnet loss reduction by 81%. Further loss reduction by 45% can be realized with the proposed tooth-tip shape. Additionally, owing to the stator and rotor modifications, the main machine parameters are investigated, such as back-EMF, electromagnetic torque, torque ripple and cogging torque. The 2-D and 3-D finite element analysis (FEA) is used for electromagnetic analysis. An experimental approach based on a partially wound stator is employed to verify the 3-D FEA.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Huang, Wen Xiong, and Li Ying Tan. "New Simulation Method of Reinforcement Simulation in FEA." Applied Mechanics and Materials 405-408 (September 2013): 972–75. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.972.

Повний текст джерела

Анотація:

During the research of local stress distribution of polyline pretensioned beams by 3-D nonlinear finite element method, a problem of curve prestressed reinforcement simulation is discovered. If the line of prestressed reinforcement is curve, the calculated result of local stress distribution is greatly affected by element size, because of the tectonic stress concentration by the coupling between the linear element and body element. Then, the validity and applicability of the model couldn't be judged. To eliminate the harmful effect, the curve prestressed reinforcement is determined to simulate by body element. The result shows that it will solve the problem thoroughly, and the calculated result is truthful and reliable. This research presents a new thought and method about the local stress analysis of the prestressed concrete structure.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Yamamoto, Y., T. Koseki, and Y. Aoyama. "Proposal of C-core Type Transverse Flux Motor for Ship Propulsion – Increasing Torque Density by Dense Stator Configuration –." Advanced Electromagnetics 2, no. 3 (February 16, 2014): 28. http://dx.doi.org/10.7716/aem.v2i3.198.

Повний текст джерела

Анотація:

Electric ship propulsion system has been drawing attention as a solution for savings in energy and maintenance costs. The system is mainly composed of motor, converter and gearbox and required for high torque at low speed. In this situation, transverse flux motors (TFMs) have been proposed to fulfill the low-speed high-torque characteristic due to suitable for short pole pitch and large number of poles to increase torque output. In this trend, we have proposed C-core type motors taking advantage of TFMs’ structure. In this manuscript, a simple design method based on the magnetic-circuit theory and simple modeling of the motor is proposed to search a design parameter for maximizing torque as a pre-process of numerical study. The method takes into consideration the effects of magnetic leakage flux, magnetic saturation and pole-core combination in accordance with the systematic theory. The simple modeling is conducted based on a dense armature structure in previous axial flux motors (AFMs) applied to the new motor design. The validity of the method is verified by 3-D finite element analysis (FEA) and relative error is at most 20%. The minimalist design is shown to be advantageous for effective use in 3-D FEA. As a detailed design by the FEA, high torque density and low cogging to output ratio can be achieved simultaneously in the proposed machine.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Cheng, Shanbao, Mark W. Olles, Aaron F. Burger, and Steven W. Day. "Optimization of a hybrid magnetic bearing for a magnetically levitated blood pump via 3-D FEA." Mechatronics 21, no. 7 (October 2011): 1163–69. http://dx.doi.org/10.1016/j.mechatronics.2011.07.010.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Srayeddin, Bassam, and Ali Almuntashri. "Stress distributions in maxillary central incisors restored with different high-stiffness post models: 3-D FEA." International Journal of Dental Research 6, no. 1 (June 5, 2018): 45. http://dx.doi.org/10.14419/ijdr.v6i1.12243.

Повний текст джерела

Анотація:

Background: Dental root posts are recommended for endodontically treated weakened teeth.Objectives: The present computational FEA study aims to evaluate the effect of material and design of the post on the stress distribution under load in different root canal shapes of endodontically treated maxillary central incisor (MCI).Methods: Three-dimensional models of (MCI) were created by using CAD modeling software and divided into two groups. Group-I comprised five models of a weakened root restored using different post materials (stainless steel, titanium, gold-alloy, Ni-Cr, and zirconium). Group-II: involved four models of (MCI) with two different root canal shapes (small and wide) restored using cylindrical (C-Post) and two-stage tapered (T-Post) posts. Each tooth model was subjected to a 100 N oblique load at the palatal surface of the crown. Von Mises equivalent stresses on dentin and post, as well as shear stresses on the post cement, were evaluated.Results: In Group-I: Ni-Cr produced the lowest stress values on the dentin, where titanium and gold-alloy posts produced the lowest stresses in the post and post/root interfaces. In Group-II: Roots restored with a T-Post showed a lower concentration stress in the dentin and lower shear stresses in the cement layer compared with those restored with a C-Post.Conclusion: The geometry of the post and the corresponding material play an important role in the stress behavior of restored teeth. The use of titanium or gold-alloy T-Posts seems a good way to improve the stress distribution profile and reduce the risk of restoration failure.

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Taran, Narges, Dan M. Ionel, and David G. Dorrell. "Two-Level Surrogate-Assisted Differential Evolution Multi-Objective Optimization of Electric Machines Using 3-D FEA." IEEE Transactions on Magnetics 54, no. 11 (November 2018): 1–5. http://dx.doi.org/10.1109/tmag.2018.2856858.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Chan, T. F., Weimin Wang, and L. L. Lai. "Magnetic Field in a Transverse- and Axial-Flux Permanent Magnet Synchronous Generator From 3-D FEA." IEEE Transactions on Magnetics 48, no. 2 (February 2012): 1055–58. http://dx.doi.org/10.1109/tmag.2011.2172394.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

37

SAWANGSURIYA, Auckpath, Thanongsak IMJAI, and Suphawut MALAIKRISANACHALEE. "Structural Responses of Flexible Pavement Subjected to Different Axle Group Loads." Walailak Journal of Science and Technology (WJST) 17, no. 12 (December 1, 2020): 1356–66. http://dx.doi.org/10.48048/wjst.2020.10731.

Повний текст джерела

Анотація:

This study presents the structural responses of flexible pavement which were subjected to different axle group loads. Three types of axle group loads, e.g. single axle-dual wheel, tandem axle-dual wheel, and tridem axle-dual wheel, were applied over the field for the instrumented trial section. The corresponding structural responses were measured using a series of embedded instrumentations e.g. pressure cells, asphalt strain gauges, strain gauges, thermocouples, moisture sensors etc. A 3-dimensional (3-D) finite-element analysis (FEA) model and the multi-layer linear-elastic analysis (LEA) were developed to estimate structural responses which were then compared with the field measurement data. Both FEA and LEA assumed the pavement layer materials to be homogeneous, isotropic, and linear-elastic. The elastic moduli of pavement layers were determined from the falling weight deflectometer (FWD) based on the backcalculation procedure. Results from the analysis indicated that both FEA and LEA were in good agreement with the field measurement results with some exceptions for strains under the asphalt concrete surface.

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Zhang, Yao, Jiayang Li, Fan Zhang, Zhangping Chen, Yaguang Kong, and Na Huang. "Structural Analysis of Loosely Coupled Transformers with FEA-Aided Visualization for Wireless Power Transfer Systems against Misalignment Tolerance." Electronics 11, no. 8 (April 12, 2022): 1218. http://dx.doi.org/10.3390/electronics11081218.

Повний текст джерела

Анотація:

The main problems of automotive wireless power transmission (WPT) systems include a weak misalignment tolerance are urgently required to be solved through the design of the loosely coupled transformer. In this paper, an analysis methodology based on finite element analysis (FEA) visualization is proposed, it is easy-implemented and straightforwardly explains this complex electromagnetic phenomenon. Firstly, the transformer structures with different winding and magnetic core arrangement were modeled by FEA in both 3-D and 2-D visualizations. The distribution of space coupling magnetic fields and leakage fields was analyzed by ANSYS Electronics. The key parameters that have a great influence on the coupling performance were delicately chosen. Then, the quantitative analysis of these key parameters and coupling performance against misalignment tolerance is presented. The numerical statistical result shows that the maximum coupling coefficient of the three structures that have been optimized consistently appears when the two key parameters, the inner and outer diameter, account for about 20% and 60% of the whole dimension of the transformers. A new transformer with a solenoid-shaped structure and strong misalignment tolerance was proposed based on the analysis methodology and the FEA results of the three structures. The delivered power and transfer efficiency under different misalignments of the new structure were analyzed via an FEA-aided joint method as well. The relationships among misalignment tolerance, key structural dimensions and coupling coefficients for all these structures were comprehensively investigated, which provide guidance for the subsequent multi-objective optimization strategies.

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Kwon, Seol Ryung, and Yongrae Roh. "A Study on a New Method for Flexoelectric Coefficient Estimation of the Flexoelectric Unimorph Sensing Element." Applied Mechanics 2, no. 4 (October 15, 2021): 841–48. http://dx.doi.org/10.3390/applmech2040048.

Повний текст джерела

Анотація:

In a flexoelectric sensing element using bending mode, estimation of the flexoelectric coefficient was investigated using 3-D stress/strain analysis and experiments. The proposed method uses the results (deformation and strain) from the finite element analysis (FEA). The estimated flexoelectric coefficients were compared with those obtained via the conventional method (Euler’s beam theory) under the assumption of the quasi 1-D stress field. The results show that the RMS value and standard deviation of the estimated flexoelectric coefficient for the 3-D stress field case of the sensing element are 31.51 µC/m and 0.24%, respectively. In addition, we found that the flexoelectric coefficient obtained from the results of the 3-D stress analysis is 1.8% smaller than that of the quasi-1-D stress analysis. Therefore, in order to obtain a more reliable flexoelectric coefficient in the sensing element, the results of the 3-D numerical stress analysis should be used for accurate estimation of the flexoelectric coefficient.

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Phan, Hao Dinh. "Numerical analysis of seismic behavior of square concrete filled steel tubular columns." Journal of Science and Technology in Civil Engineering (STCE) - NUCE 15, no. 2 (April 27, 2021): 127–40. http://dx.doi.org/10.31814/stce.nuce2021-15(2)-11.

Повний текст джерела

Анотація:

This paper presents a numerical analysis of the seismic behavior of square concrete filled steel tubular (CFST) columns. Finite element analysis (FEA) models in ABAQUS software were used to simulate a series of columns subjected to axial compression and cyclic lateral loading. The CFST columns were simulated using nonlinear tri-dimensional (3-D) finite elements for the infilled concrete, and nonlinear two-dimensional (2-D) finite elements for the steel tube. The feasibility of the FEA model has been validated by published experimental results. The validated FEA model was further extended to conduct parametric studies with various parameters including axial load level (n), width-to-thickness ratio of steel tube (B/t), and concrete strength. The numerical analysis results reveal that with the same B/t and constitute materials, the higher the axial compression, the lower the shear strength and deformation capacity were. The thicker steel wall (B/t = 21) resulted in higher strength and larger deformation capacity of the column. Increasing concrete strength helped to significantly develop the column’s shear strength in all cases. Meanwhile, it just led to an increase in deformation capacity in some cases depending on n and B/t. This study also reveals that the square CFST columns with B/t of 21 satisfy the seismic performance demand in high seismic zones (ultimate interstory drift ratio (IDRu) not less than 3% radian) under the two axial load levels, 0.35 and 0.45, but the columns with B/t of 28 satisfy the above demand under just one axial load level of 0.35. Keywords: square concrete filled steel tubular (CFST) columns; finite element analysis (FEA) model; width-to-thickness ratio (B/t); high axial load level; seismic behavior.

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Fan, Jian Jian, and Jian Hua Wu. "Reduction of Cogging Torque in Permanent Magnet Synchronous Motor Using the Taguchi Method." Applied Mechanics and Materials 278-280 (January 2013): 143–48. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.143.

Повний текст джерела

Анотація:

This paper presents the use of Taguchi methods in optimizing a PMSM for reducing peak value of cogging torque. The analytical model of cogging torque is derived by the energe method. The Taguchi optimization method was used to generate the experiment samples, which were calculated in 2-D and 3-D FEA. Three different parameters of PMSM, such as skew ratio, pole embrace and stator slot width were optimized. ANOVA was used to analysis the effect of different factors in Taguchi method.

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Kim, Hong Gun, Yoo Shin Kim, Sung Mo Yang, D. P. Hong, S. C. Nah, G. E. Yang, and H. K. Lee. "Shape Design Optimization of the Boom System in High Ladder Vehicle." Key Engineering Materials 306-308 (March 2006): 679–84. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.679.

Повний текст джерела

Анотація:

A shape design optimization of the boom system in high ladder vehicle modeled by 3-dimensional finite elements is carried out. The structural analysis is performed using 3-D FEA (Finite Element Analysis) giving the results of displacements, stresses and natural frequencies. The section height and width of the boom is controlled by the FEA result data. The subproblem approximation method is implemented for the optimal shape based on displacement and principal stress. In the meantime, Lanzcos algorithm method is implemented in order to find the natural frequency of the system. The optimal models obtained by three different optimization processes are compared with the initial model and evaluated for economic conditions respectively. It is found that the different shape optimization processes give the different shape optimization results, which suggest their unique optimal shapes under their necessary design condition.

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Rusthi, Mohamed, Poologanathan Keerthan, Mahen Mahendran, and Anthony Ariyanayagam. "Investigating the fire performance of LSF wall systems using finite element analyses." Journal of Structural Fire Engineering 8, no. 4 (December 11, 2017): 354–76. http://dx.doi.org/10.1108/jsfe-04-2016-0002.

Повний текст джерела

Анотація:

Purpose This research was aimed at investigating the fire performance of LSF wall systems by using 3-D heat transfer FE models of existing LSF wall system configurations. Design/methodology/approach This research was focused on investigating the fire performance of LSF wall systems by using 3-D heat transfer finite element models of existing LSF wall system configurations. The analysis results were validated by using the available fire test results of five different LSF wall configurations. Findings The validated finite element models were used to conduct a parametric study on a range of non-load bearing and load bearing LSF wall configurations to predict their fire resistance levels (FRLs) for varying load ratios. Originality/value Fire performance of LSF wall systems with different configurations can be understood by performing full-scale fire tests. However, these full-scale fire tests are time consuming, labour intensive and expensive. On the other hand, finite element analysis (FEA) provides a simple method of investigating the fire performance of LSF wall systems to understand their thermal-mechanical behaviour. Recent numerical research studies have focused on investigating the fire performances of LSF wall systems by using finite element (FE) models. Most of these FE models were developed based on 2-D FE platform capable of performing either heat transfer or structural analysis separately. Therefore, this paper presents the details of a 3-D FEA methodology to develop the capabilities to perform fully-coupled thermal-mechanical analyses of LSF walls exposed to fire in future.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

González-Teodoro, Jorge Rafael, Enrique González Romero-Cadaval, Rafael Asensi, Roberto Prieto, and Vladimir Kindl. "New electrical parameters extraction method based on simplified 3D model using finite element analysis." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 2 (November 29, 2019): 297–316. http://dx.doi.org/10.1108/compel-02-2019-0075.

Повний текст джерела

Анотація:

Purpose The purpose of this paper is the presentation of an electrical equivalent circuit for inductive components as well as the methodology for electrical parameter extraction by using a 3 D finite element analysis (FEA) tool. Design/methodology/approach A parameter extraction based on energies has been modified for three dimensions. Some simplifications are needed in a real model to make the 3 D finite element method (FEM) analysis operative for design engineers. Material properties for the components are modified at the pre-modeling step and a corrector factor is used at the post-modeling step to achieve the desired accuracy. Findings The current hardware computational limitations do not allow the 3 D FEA for every magnetic component, and due to the component asymmetries, the 2 D analysis are not precise enough. The application of the new methodology for three dimensions to several actual components has shown its usefulness and accuracy. Details concerning model parameters extration are presented with simulation and measurement results at different operation frequencies from 1 kHz to 1 GHz being the range of switching frequencies used by power electronic converters based on Si, SiC or GaN semiconductors. Practical implications This new model includes the high-frequency effects (skin effect, proximity effect, interleaving and core gap) and other effects can be only analyzed in 3 D analysis for non-symmetric components. The electrical parameters like resistance and inductance (self and mutual ones) are frequency-dependent; thus, the model represents the frequency behavior of windings in detail. These parameters determine the efficiency for the inductive component and operation capabilities for the power converters (as in the voltage boost factor), which define their success on the market. Originality/value The user can develop 3 D finite element method (FEM)-based analyses with geometrical simplifications, reducing the CPU time and extracting electrical parameters. The corrector factor presented in this paper allows obtaining the electrical parameters when 3D FE simulation would have developed without any geometry simplications. The contribution permits that the simulations do not need a high computational resource, and the simulation times are reduced drastically. Also, the reduced CPU time needed per simulation gives a potential tool to optimize the non-symmetric components with 3 D FEM analysis.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Deo, M. V., and P. Michaleris. "Experimental Verification of Distortion Analysis of Welded Stiffeners." Journal of Ship Production 18, no. 04 (November 1, 2002): 216–25. http://dx.doi.org/10.5957/jsp.2002.18.4.216.

Повний текст джерела

Анотація:

This paper presents an experimental verification for the predictive distortion analysis approach proposed in Michaleris & DeBicarri (1996,1997) and Vanli & Michaleris (2001) for welded T-type stiffeners. The predictive technique employing the decoupled 2-D and 3-D approach is used for the prediction of buckling distortion and the magnitude of bowing distortion. Two-dimensional thermo-mechanical welding process simulations are performed to determine the residual stress. The critical buckling stress along with the buckling mode are computed in 3-D eigenvalue analyses. Large deformation analyses are carried out to predict the magnitude of bowing distortion. Experimental validation of the prediction is carried out in the lab. Welding experiments are carried out using welding conditions identical to those used in the FEA model. The computational results are then verified with experimental observations

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Chang, Ting Ping, Shyh Chour Huang, Te Fu Huang, and Thanh Phong Dao. "Analysis of Cold Preforming Process for Hollow Fasteners with Thin Flange." Applied Mechanics and Materials 418 (September 2013): 246–49. http://dx.doi.org/10.4028/www.scientific.net/amm.418.246.

Повний текст джерела

Анотація:

This paper aims to study and detect the imperfects of the hollow fasteners with thin flange during cold forging process. In this study, the finite element analysis (FEA) based on 3-D DEFORMTM software to investigate the plastic deformation behavior of the hollow fasteners with thin flange. The simulation results showed that there is a folding phenomenon, which is occurring in the forming process. As a result, it revealed that with using FEA, the imperfects of forming hollow fasteners with the thin flange can be correctly predicted. From that, the occurrence of defects can be effectively prevented in the actual fabricating process. Future work will include an investigation into the optimization of the mold geometric parameters during cold pre-forming process for hollow fasteners with thin flange by comparing the simulative and experimental results.

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Utsunomiya, Ryouma, and Katsumi Yamazaki. "Parallel Computing of 3-D FEA Including Matrix Preconditioning for Analysis of Rotating Machines Coupled With Circuit Equations." IEEE Transactions on Magnetics 57, no. 6 (June 2021): 1–4. http://dx.doi.org/10.1109/tmag.2021.3069819.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Li, Liang. "Numerical Simulation and Technology Research on the Precision Forging for M93 Guide Cylinder." Applied Mechanics and Materials 65 (June 2011): 461–66. http://dx.doi.org/10.4028/www.scientific.net/amm.65.461.

Повний текст джерела

Анотація:

Based on building the 3-D elastoplastic FEA model on the M93 guide cylinder and its mould, the process of cold extrusion was simulated by the numerical simulation analysis. The varying rules of extruding forces, velocity, stress as well as metal fluent regulation were obtained. The results of simulation agreed with the practice. This research played a guiding role on the simulation of the cold extrusion and the design of the die set.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Uhlir, Richard, Virginia Mayo, Pei Hua Lin, Si Chen, Yan-Ting Lee, Garland Hershey, Feng-Chang Lin, and Ching-Chang Ko. "Biomechanical characterization of the periodontal ligament: Orthodontic tooth movement." Angle Orthodontist 87, no. 2 (August 19, 2016): 183–92. http://dx.doi.org/10.2319/092615-651.1.

Повний текст джерела

Анотація:

ABSTRACT Objective: To quantify the biomechanical properties of the bovine periodontal ligament (PDL) in postmortem sections and to apply these properties to study orthodontic tooth intrusion using finite element analysis (FEA). We hypothesized that PDL's property inherited heterogeneous (anatomical dependency) and nonlinear stress-strain behavior that could aid FEA to delineate force vectors with various rectangular archwires. Materials and Methods: A dynamic mechanical analyzer was used to quantify the stress-strain behavior of bovine PDL. Uniaxial tension tests using three force levels (0.5, 1, and 3 N) and samples from two anatomical locations (circumferential and longitudinal) were performed to calculate modulus. The Mooney-Rivlin hyperelastic (MRH) model was applied to the experimental data and used in an FEA of orthodontic intrusion rebounded via a 0.45-mm step bend with three archwire configurations of two materials (stainless steel and TMA). Results: Force levels and anatomical location were statistically significant in their effects on modulus (P < .05). The apical part had a greater stiffness than did the middle part. The MRH model was found to approximate the experimental data well (r = 0.99), and it demonstrated a reasonable stress-strain outcome within the PDL and bone for FEA intrusion simulation. The force acting on the tooth increased five times from the 0.016 × 0.022-inch TMA to the 0.019 × 0.025-inch stainless steel. Conclusions: The PDL is a nonhomogeneous tissue in which the modulus changed in relation to location. PDL nonlinear constitutive model estimated quantitative force vectors for the first time to compare intrusive tooth movement in 3-D space in response to various rectangular archwires.

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Wang, Man, Rui Xiang Bai, and Yan An Shen. "Numerical Analysis of Composite Wind Turbine Blade Considering Failure Behavior." Applied Mechanics and Materials 166-169 (May 2012): 375–78. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.375.

Повний текст джерела

Анотація:

The paper studies the failure of the 3-D complicated configuration composite turbine blade by applying failure criterion. This failure criterion considers three kinds of different failures. They are matrix tensile/compressive failure, fiber- matrix shear failure and fiber failure. By Using FEA software ABAQUS, the stiffness degradation and failure behavior of the turbine blade of composite structure were studied. The failure and stiffness degradation of the two analysis models were conducted by typical numerical examples as well.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "FEA 3-D"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями