The Impact of FEM Modeling Parameters on the Computed Thermo-Mechanical Behavior of SLA Copper Shelled Electrodes

In this study, the authors use the finite element method to model and analyse a cylindrical copper shelled SLA electrode for EDM operations, which is investigated experimentally in literature. A uniform silver paint thickness and copper shell thickness is assumed around the SLA epoxy core. In the experiment, 2-D analysis was used due to the axissymmetric shape, and steady state and transient die sink EDMing simulations were followed. Modelling parameters are varied and their impact on the resulting temperature and stress fields is evaluated. The intermittent nature of the electrode thermal loading is also simulated with FEM transient analysis. It is shown that, using the finite element method, the influence of the copper shelled SLA electrode manufacturing and EDM-process parameters can be studied.

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Application of FEM Modeling to Simulate Metal Flow in Forging a Titanium Alloy Engine Disk

Journal of Engineering for Industry ◽

10.1115/1.3185895 ◽

1983 ◽

Vol 105 (4) ◽

pp. 251-258 ◽

Cited By ~ 38

Author(s):

S. I. Oh ◽

J. J. Park ◽

S. Kobayashi ◽

T. Altan

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Titanium Alloy ◽

Metal Flow ◽

The Finite Element Method ◽

Fem Modeling ◽

Forging Process ◽

Deformation Mechanics ◽

Effects Of Temperature ◽

Element Method

The isothermal forging of a titanium alloy engine disk is analyzed by the rigid-viscoplastic finite element method. Deformation mechanics of the forging process are discussed, based on the solution. The effects of temperature and heat conduction on the forging process are also investigated by coupled thermo-viscoplastic analysis. Since the dual microstructure / property titanium disk can be obtained by controlling strain distribution during forging, the process modeling by the finite element method is especially attractive.

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Mathematical Simulation of Rigid Pile Composite Foundation with Lateral Unloading

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.368-370.756 ◽

2013 ◽

Vol 368-370 ◽

pp. 756-759

Author(s):

Jing Ma ◽

Wen Sheng Chen ◽

Xue Feng Hu

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Mathematical Simulation ◽

Horizontal Displacement ◽

Composite Foundation ◽

The Finite Element Method ◽

Rigid Pile ◽

Rigid Pile Composite Foundation ◽

The Impact ◽

Element Method

Based on the Finite Element Method ,a model has been built to study the impact of rigid pile composite foundation with lateral unloading,then obtained a conclusion about the horizontal displacement during excavating.

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Optimization Procedure of Roller Elements Geometry with Regard to Durability of Spherical Roller Bearings

Communications - Scientific letters of the University of Zilina ◽

10.26552/com.c.2020.2.68-72 ◽

2020 ◽

Vol 22 (2) ◽

pp. 68-72

Author(s):

Jan Steininger ◽

Stefan Medvecky ◽

Robert Kohar ◽

Tomas Capak

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Roller Bearing ◽

Optimization Procedure ◽

Parametric Models ◽

The Finite Element Method ◽

Roller Bearings ◽

Contact Points ◽

The Impact ◽

Element Method

The article deals with an optimization procedure of roller elements geometry with regard to durability of spherical roller bearings. The aim of the article is to examine the impact of change of the roller elements inner geometry on durability and reliability of spherical roller bearings; the contact strain along a spherical roller by means of the Finite Element Method at contact points of components of a spherical roller bearing by means of designed 3D parametric models. The most appropriate shape of roller elements inner geometry of a bearing from the standpoint of calculated durability was determined based on results of the contact analyses.

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Engineering Calculations of Microelectronic Products Parts and Assemblies Using Finite-Element Modeling

Proceedings of Universities ELECTRONICS ◽

10.24151/1561-5405-2021-26-3-4-255-264 ◽

2021 ◽

Vol 26 (3-4) ◽

pp. 255-264

Author(s):

E.Y. Chugunov ◽

◽

A.I. Pogalov ◽

S.P. Timoshenkov ◽

◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Material Properties ◽

Integrated Approach ◽

Design And Technology ◽

Design Parameters ◽

The Finite Element Method ◽

Operational Factors ◽

The Impact ◽

Element Method

In the context of increasing the electronic components integration level, growing functionality and packaging density, as well as reducing the electronics weight and size, an integrated approach to engineering calculations of parts and assemblies of modern functionally and technically complex microelectronic products is required. Of particular importance are engineering calculations and structural modeling using computer-aided engineering systems, and also assessment of structural, technological and operational factors’ impact on the products reliability and performance. This work presents an approach to engineering calculations and microelectronic products modeling based on the finite-element method providing a comprehensive account of various factors (material properties, external loading, temperature fields, and other parameters) impact on the stress-strain state, mechanical strength, thermal condition, and other characteristics of products. On the example of parts and assemblies of products of microelectronic technology, the approximation of structures was shown and computer finite-element models were developed to study various structural and technological options of products and the effects on them. Engineering calculations and modeling of parts and assemblies were performed, taking into account the impact of material properties, design parameters and external influences on the products’ characteristics. Scientific and technical recommendations for structure optimization and design and technology solutions ensuring the products resistance to diverse effects were developed. It has been shown that an integrated approach to engineering calculations and microelectronic products modeling based on the finite-element method provides for the determination of optimal solutions taking into account structural, technological, and operational factors and allows the development of products with high tactical, technical and operational characteristics.

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Use of the Finite Element Method in the Analysis of Impact-Induced Longitudinal Waves in Constrained Elastic Systems

Journal of Mechanical Design ◽

10.1115/1.2826144 ◽

1995 ◽

Vol 117 (2A) ◽

pp. 336-342 ◽

Cited By ~ 7

Author(s):

W. H. Gau ◽

A. A. Shabana

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Virtual Work ◽

Fourier Method ◽

Jump Discontinuity ◽

Elastic Rods ◽

The Finite Element Method ◽

Longitudinal Waves ◽

The Impact ◽

Element Method

In rotating elastic rods, dispersions occurs as the result of the finite rotations. By using Fourier method, it can be shown that the impact-induced longitudinal waves no longer travel with the same phase velocities. Furthermore, the speeds of the wave propagation are independent of the impact conditions including the value of the coefficient of restitution. In this investigation the use of the finite element method in the analysis of impact-induced longitudinal waves in rotating elastic rods is examined. The equations of motion are developed using the principle of virtual work in dynamics. Jump discontinuity in the system velocity vector as result of impact is predicted using the generalized impulse momentum equations. The solution obtained using the finite element method is compared with the solution obtained using Fourier method. Numerical results show that there is a good agreement between the solution obtained by using Fourier method and the finite element solution in the analysis of wave motion. However, discrepancies between the two solutions in the analysis of the velocity waves are observed and discussed in this paper.

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Impact Damage Analysis and Experimental Test of Carbon/Epoxy Composite Laminate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1120-1121.590 ◽

2015 ◽

Vol 1120-1121 ◽

pp. 590-592

Author(s):

Hyoh Yun Choi ◽

Yeon Jun Lim ◽

Hyun Jun Cho ◽

Hyun Bum Park

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Composite Laminate ◽

Impact Analysis ◽

Impact Damage ◽

The Finite Element Method ◽

Fem Model ◽

The Impact ◽

Method Analysis ◽

Element Method

In this work, study on impact damage FEM model of composite structure was performed. From the finite element method analysis results of composite laminate, it was confirmed that the results of analysis was reasonable. The velocity of impactor to initiate damage was estimated, and in order to investigate the damage at the predicted velocity, impact analysis using finite element method was performed. According to the impact analysis results of composite laminate, it was confirmed that the damage was generated at the estimated impact velocity. Finally, the comparison of the numerical results with those measured by the experiment showed good agreement.

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Modeling of the impact of hold-down forces on the accuracy of the workpiece shape using the finite element method

10.33920/pro-2-2102-01 ◽

2021 ◽

pp. 9-20

Author(s):

A.V. Zaitsev ◽

A.N. Izosimov

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Cross Section ◽

The Body ◽

Machining Process ◽

Mechanical Processing ◽

The Finite Element Method ◽

The Cross ◽

The Impact ◽

Element Method

In the article, the modeling of the impact of hold-down forces on the accuracy of the shape of the workpiece using the finite element method was carried out. The operation of mechanical processing (turning cut) of a workpiece of the body of rotation type on a milling machine with basing and fixing along the inner cylindrical surface of the workpiece is considered. The study was conducted for four different types of machine retaining devices used on machines of this group. A consistent description and illustration of the method of modeling the process of the impact of hold-down forces on the workpiece is made for each type of the device under consideration. The force constraints and effects imposed on the model are described and illustrated, the parameters of the finite element grid used in modeling are presented, the displacement profiles obtained in the modeling process and the stages of modeling the machining process are described, and the values of the largest deviations from the shape of the workpiece are determined. The results of the modeling are presented: a qualitative picture of the shape errors obtained as a result of mechanical processing — the values of the largest deviation from the roundness and the largest deviation from the cross-section profile of the workpiece to be processed, as well as the shape of the cutting obtained in the cross-section of the workpiece for each type of the devices under consideration. On the basis of the obtained results, estimates of the degree of accuracy of the shape and the relative geometric accuracy provided by the considered devices were made in accordance with GOST 24643–81. The conclusion is made about the suitability of using the considered variants of machine retaining devices for the proposed technological process according to the criterion of the provided accuracy of the shape of the processed surface. English version of the article is available at URL: https://panor.ru/articles/modeling-the-influence-of-the-fastening-forces-on-the-accuracy-of-the-workpiece-shape-using-the-finite-element-method/65043.html

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