Elastic-Plastic Numerical Simulation of Cold Rotary Forging for Hypoid Gear and the Springback Error

2014 ◽  
Vol 633-634 ◽  
pp. 826-831
Author(s):  
Yu Gong Dang ◽  
Xiao Zhong Deng ◽  
Bin Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Geometric Model ◽  
Material Model ◽  
Hypoid Gear ◽  
Workpiece Material ◽  
Elastic Plastic ◽  
Rotary Forging ◽  
Plastic Forming ◽  
Cold Rotary Forging

To achieve the effect of anti-fatigue manufacturing for hypoid gear, the author put forward a new type cold rotary forging technology, the method simplifies the die structure and adopts the local line contact continuous plastic forming. Based on the basic theory of elastic-plastic finite element method (FEM),the author uses ABAQUS to carry out numerical simulation of cold rotary forging and discuss how to build finite element geometric model and grid it in detail, and analyse the definition of workpiece material model in ABAQUS and the merger technology of Abaqus / Explicit and Abaqus / Standard. In order to measure springback error accurately, the alveolar surface shap after springback was got through the technology of surface reconstruction, it was put into Geomagic Qualify software and compare with target CAD model,then the springback error can befully assessed through comparing results.The examles proof that ABAQUS can simulate the deformation and springback process accurately, springback error of cold rotary forging can not be ignored,so springback error must be compensated.

scholarly journals Numerical simulation of blanking process

2018 ◽  
Vol 157 ◽  
pp. 02038
Author(s):  
Peter Pecháč ◽  
Milan Sága
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Steel Sheet ◽  
Plastic Material ◽  
Material Model ◽  
Rolled Steel ◽  
Finite Element Software ◽  
History Of ◽  
Cold Rolled ◽  
Blanking Process

This paper presents numerical simulation of blanking process for cold-rolled steel sheet metal. The problem was modeled using axial symmetry in commercial finite element software ADINA. Data obtained by experimental measurement were used to create multi-linear plastic material model for simulation. History of blanking force vs. tool displacement was obtained.

Elastic and elastic-plastic finite element analysis of hollow tubes with axisymmetric internal projections under combined axial and pressure loading

2001 ◽  
Vol 36 (4) ◽  
pp. 373-390 ◽  
Author(s):  
S. J Hardy ◽  
M. K Pipelzadeh ◽  
A. R Gowhari-Anaraki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Internal Pressure ◽  
Plastic Material ◽  
Axial Loading ◽  
Material Model ◽  
Pressure Loading ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Applied Loading

This paper discusses the behaviour of hollow tubes with axisymmetric internal projections subjected to combined axial and internal pressure loading. Predictions from an extensive elastic and elastic-plastic finite element analysis are presented for a typical geometry and a range of loading combinations, using a simplified bilinear elastic-perfectly plastic material model. The axial loading case, previously analysed, is extended to cover the additional effect of internal pressure. All the predicted stress and strain data are found to depend on the applied loading conditions. The results are normalized with respect to material properties and can therefore be applied to geometrically similar components made from other materials, which can be represented by the same material models.

Numerical Simulation of Non-Circular Hole Joint Precision Forming

2009 ◽  
Vol 16-19 ◽  
pp. 462-465
Author(s):  
Yong Fei Gu ◽  
Jun Ting Luo
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Circular Hole ◽  
Developed Countries ◽  
Forming Process ◽  
Backward Extrusion ◽  
Forming Technology ◽  
Plastic Forming ◽  
And Performance

The precision forming technology developed rapidly during passing two decades, however technologies of precision plastic forming the parts with deeper hole are far behind developed countries. The warm backward extrusion-ironing forming technology was presented for precision forming of non-circular hole joint in this paper. The forming process and parameter variable trend were simulated by finite element method, which the software MSC.Marc was applied. The forming die was designed and the forming experiment was finished. The products were deserved with good quality and performance. The feasibility of the forming technology is proved by experimental results and numerical simulation.

Study on FEM Numerical Simulation Method for the Welding Distortion

2011 ◽  
Vol 704-705 ◽  
pp. 1316-1321 ◽  
Author(s):  
Yao Hui Lu ◽  
Xing Wen Wu ◽  
Jing Zeng ◽  
Ping Bo Wu
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Welding Distortion ◽  
Railway Vehicle ◽  
Welding Deformation ◽  
Bogie Frame ◽  
Elastic Plastic ◽  
Side Beam ◽  
Element Method

The control of welding distortion during assembly process is very important. At present, there are mainly two numerical simulation methods for the welding distortion which are thermo-elastic-plastic finite element method and its simplified approach of inherent strains. At first, taking T-joint as an example, the welding distortions were computed using two methods mentioned above. Based on thermo-elastic-plastic finite element method, welding process was simulated by life and death element, moving heat source and transient state thermal field etc. Then, the welding distortion was calculated by inherent strains method after thermo-elastic-plastic computation. It was concluded from the comparison that the simulation results by using the two methods are consistent. Therefore, the inherent strains method can be conveniently and economically applied to prediction of structural welding distortion in engineering. Applied the inherent strains method, welding deformation was predicted for the bogie frame side beam of high speed train. According to the deformation results from the finite element analysis, the welding deformation of the bogie frame side beam was lager than the tolerance of quality and in reasonable agreement with the experimentally determined distortion values. The work in this paper indicated that the inherent strains method was effective to predict the welding deformation so as to control the welding quality in large complex structures, such as the bogie frame of railway vehicle. Key words: welding distortion; thermo-elastic-plastic method; inherent strains approach; numerical simulation; bogie frame;

3D FE Modeling Simulation of Cold Rotary Forging with Double Symmetry Rolls

2009 ◽  
Vol 628-629 ◽  
pp. 623-628
Author(s):  
Xing Hui Han ◽  
Lin Hua ◽  
Yumin Zhao
Keyword(s):  
Innovative Technology ◽  
Fe Model ◽  
Software Environment ◽  
Rotary Forging ◽  
Modeling Simulation ◽  
Forming Technology ◽  
Plastic Forming ◽  
As Stress ◽  
Cold Rotary Forging ◽  
Double Symmetry

A novel metal plastic forming technology, cold rotary forging with double symmetry rolls, is presented on the basis of cold rotary forging with single roll. A reasonable 3D elastic-plastic dynamic explicit FE model of cold rotary forging with double symmetry rolls is developed under the ABAQUS software environment. Through simulation, the distributions and histories of different field-variables such as stress, strain and force and power parameters are investigated in detail. The research results not only provide an advanced and innovative technology for metal plastic forming, but also help to better understand cold rotary forging with double symmetry rolls.

Numerical Analysis and Optimization of Stamping Technology for Electrical Motor’s Cover

2010 ◽  
Vol 97-101 ◽  
pp. 315-319 ◽  
Author(s):  
Bai Liu ◽  
Yong Quan Zhou ◽  
Ming Jun Liu ◽  
Zhen Yu Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Analysis ◽  
Plastic Flow ◽  
Process Parameters ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Stamping Process

Based on Finite Element Analysis (FEA) module of Dynaform software, the paper made numerical simulation of a motor cover’s stamping process in the method of elastic-plastic flow, pointed out the behavior of deformation of stamping process, predicted and prevented stamping defect such as crack in the process, and calculated the degree of resilience. Consequently three forming numerical simulation schemes have been designed respectively, more feasible process parameters has been achieved in comparison with the features of each scheme.

Study on Key Factors of Numerical Simulation on Automotive Panel Forming

2012 ◽  
Vol 503-504 ◽  
pp. 115-118
Author(s):  
Qiang Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Adaptive Mesh ◽  
Material Model ◽  
Element Formulation ◽  
Key Factors ◽  
Shell Elements ◽  
Automobile Panel ◽  
Hourglass Control ◽  
Element Type

In this paper, for improving simulative accuracy of auto panel forming, some key factors of numerical simulation with finite element method on automobile panel stamping forming are researched. These key factors include finite element algorithm, adaptive mesh, element type and element formulation, hourglass control, material model, and so on. Through simulation example and analysis show that the dynamic explicit algorithm is suitable for metal stamping forming and the static implicit algorithm for springback stage, the adaptive mesh must be adopted in sheet blank forming, element should be selected shell elements, material model should be selected Barlat’s 3-parameter plasticity model.

Fitness for Service Assessment on Local Metal Loss Near a Discontinuity Using Elastic-Plastic Stress Analysis

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Zhanghai (John) Wang ◽  
Samuel Rodriguez
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Plastic Material ◽  
Material Model ◽  
Metal Loss ◽  
Technical Approach ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Structural Discontinuity ◽  
Elastic Plastic Material

In fitness for service (FFS) assessments, one issue that people often encounter is a corroded area near a structural discontinuity. In this case, the formula-based sections of the FFS standard are incapable of evaluating the component without resorting to finite element analysis (FEA). In this paper, an FEA-based technical approach for evaluating FFS assessments using an elastic-plastic material model and reformed criteria is proposed.

Elastic—plastic finite element analysis of short flat bars with projections part 2: Axial loading

1996 ◽  
Vol 31 (1) ◽  
pp. 25-33 ◽  
Author(s):  
S J Hardy ◽  
M K Pipelzadeh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Plastic Material ◽  
Axial Loading ◽  
Material Model ◽  
Shear Loading ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Elastic Plastic Material ◽  
Stress Concentration Factors

This paper describes the results of a study of the elastic–plastic behaviour of short flat bars with projections subjected to monotonic and cyclic axial loading using finite element analysis. The results are complementary to similar results for (a) shear loading and (b) combined axial and shear loading. Six geometries are considered and elastic–plastic stress and strain data for both local and remote restraints are presented. These geometries and associated restraints result in elastic stress concentration factors in the range 1.69–4.96. A simple bilinear elastic–plastic material model is assumed and the results are normalized with respect to material properties so that they can be applied to geometrically similar components made from other materials which can be represented by the same material models.

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