scholarly journals Analysis Of Deformation And Microstructural Evolution In The Hot Forging Of The Ti-6Al-4V Alloy

2015 ◽  
Vol 60 (2) ◽  
pp. 597-604 ◽  
Author(s):  
M. Kukuryk
Keyword(s):  
Effective Strain ◽  
Metal Flow ◽  
Hot Forging ◽  
Three Dimensional ◽  
Test Results ◽  
Rigid Plastic ◽  
Microstructure Parameters ◽  
Thermal Phenomena ◽  
Tool Types

Abstract The paper presents the analysis of the three-dimensional strain state for the cogging process of the Ti-6Al-4V alloy using the finite element method, assuming the rigid-plastic model of the deformed body. It reports the results of simulation studies on the metal flow pattern and thermal phenomena occurring in the hot cogging process conducted on three tool types. The computation results enable the determination of the distribution of effective strain, effective stress, mean stress and temperature within the volume of the blank. This solution has been complemented by adding the model of microstructure evolution during the cogging process. The numerical analysis was made using the DEFORM-3D consisting of a mechanical, a thermal and a microstructural parts. The comparison of the theoretical study and experimental test results indicates a potential for the developed model to be employed for predicting deformations and microstructure parameters.

scholarly journals Analysis Of Deformation And Microstructural Evolution In The Hot Forgingof The Ti-6Al-4V Alloy

2015 ◽  
Vol 60 (3) ◽  
pp. 1639-1648 ◽  
Author(s):  
M. Kukuryk
Keyword(s):  
Effective Strain ◽  
Metal Flow ◽  
Three Dimensional ◽  
Test Results ◽  
The Finite Element Method ◽  
Rigid Plastic ◽  
Microstructure Parameters ◽  
Thermal Phenomena ◽  
Tool Types

Abstract The paper presents the analysis of the three-dimensional strain state for the cogging process of the Ti-6Al-4V alloy using the finite element method, assuming the rigid-plastic model of the deformed body. It reports the results of simulation studies on the metal flow pattern and thermal phenomena occurring in the hot cogging process conducted on three tool types. The computation results enable the determination of the distribution of effective strain, effective stress, mean stress and temperature within the volume of the blank. This solution has been complemented by adding the model of microstructure evolution during the cogging process. The numerical analysis was made using the DEFORM-3D consisting of a mechanical, a thermal and a microstructural parts. The comparison of the theoretical study and experimental test results indicates a potential for the developed model to be employed for predicting deformations and microstructure parameters.

Numerical Investigation of Fine Blanking of a Helical Gear

2012 ◽  
Vol 190-191 ◽  
pp. 121-125 ◽  
Author(s):  
Shan Yang ◽  
Lin Hua ◽  
Yan Li Song
Keyword(s):  
Effective Strain ◽  
Metal Flow ◽  
Three Dimensional ◽  
Helical Gear ◽  
Fe Model ◽  
Forming Process ◽  
Rigid Plastic ◽  
Fine Blanking ◽  
Metal Forming Process ◽  
Blanking Process

Fine blanking, as an effective and economy metal forming process, can be used for the manufacturing of helical gears with inclined forming movement. In the present study, a reliable three-dimensional (3D) rigid-plastic finite element (FE) model is developed on the DEFORM-3D platform for rotational fine blanking of a helical gear. Based on this FE model, distributions of different field variables such as metal flow velocity, mean stress and effective strain are obtained, and cut surface features and punch stroke curve are predicted. The results achieved in this study can not only evaluate the capabilities of the rotational fine blanking process of a helical gear, but also provide valuable guidelines and a better understanding of the deformation mechanism of this process.

3-D Finite Element Simulation of the Vertical-Horizontal Rolling Process

2010 ◽  
Vol 145 ◽  
pp. 187-192 ◽  
Author(s):  
Jin Hua Ruan ◽  
Li Wen Zhang ◽  
Chong Xiang Yue ◽  
Sen Dong Gu ◽  
Wen Bin He ◽  
...  
Keyword(s):  
Finite Element ◽  
Deformation Behavior ◽  
Metal Flow ◽  
Three Dimensional ◽  
Rolling Process ◽  
Shape Evolution ◽  
Rigid Plastic ◽  
Coupling Analysis ◽  
Mechanical Coupling ◽  
Element Simulation

In order to investigate the deformation behavior of a plate during a vertical-horizontal rolling process, a thermo-mechanical coupling analysis is carried out by three-dimensional (3-D) rigid-plastic FEM to simulate the process. The metal flow and the shape evolution of the plate are focused during this investigation. The thickness and the width of the plate agree well with the measured values.

Numerical Analysis of Rolling Extrusion Process of a Hollow Hub / Analiza Numeryczna Procesu Przepychania Obrotowego Piasty Drążonej

2012 ◽  
Vol 57 (4) ◽  
pp. 1137-1142 ◽  
Author(s):  
J. Bartnicki
Keyword(s):  
Numerical Analysis ◽  
Effective Stress ◽  
Experimental Verification ◽  
Effective Strain ◽  
Metal Flow ◽  
Three Dimensional ◽  
Extrusion Process ◽  
Design Tools ◽  
Extruded Product ◽  
Deform 3D

This paper presents the results of numerical calculations of rolling extrusion process of a hollow hub. Simulations were made by means of software Deform 3D in three dimensional state of strain. Distributions of effective stress, effective strain and damage criterion in the rolled extruded product were analyzed. Verification of metal flow during process allowed to design tools for experimental verification in PO-2 laboratory rolling - extrusion aggregate. For these needs also process force parameters were calculated.

Determination of Mechanical and Electrical Damages of Piezoelectric Material with Periodically Distributed Microvoids

2007 ◽  
Vol 23 (3) ◽  
pp. 239-244 ◽  
Author(s):  
X. H. Yang ◽  
G. W. Zeng ◽  
C. Y. Chen
Keyword(s):  
Volume Fraction ◽  
Effective Properties ◽  
Three Dimensional ◽  
Electromechanical Properties ◽  
Dimensional Finite Element ◽  
Microstructure Parameters ◽  
Three Dimensional Finite Element ◽  
The Continuum ◽  
Mechanical And Electrical Damages

AbstractThis paper emphasizes on determining the mechanical and electrical damages of piezoelectric ceramics with periodically distributed ellipsoidal or spherical microvoids. Based on the unit cell method, detailed three-dimensional finite element analyses are carried out to acquire the effective electromechanical properties of voided PZT-7A materials, and then the mechanical and electrical damages are determined through the relations between the damage variables and the effective properties in the continuum piezoelectric damage constitutive theory. The quantitative connections between the damages and microstructure parameters, including the microvoid volume fraction and the microvoid aspect ratio, are analyzed in detail. Some interesting conclusions are obtained.

Finite Element Analysis of Heterogeneous Sandwich Sheets During Rolling

2009 ◽  
Vol 419-420 ◽  
pp. 285-288
Author(s):  
Dyi Cheng Chen ◽  
Jia Hao Cao ◽  
Yao Chow Liu
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Rolled Product ◽  
Effective Strain ◽  
Three Dimensional ◽  
Sheet Thickness ◽  
Rigid Bodies ◽  
Rigid Plastic ◽  
Element Analysis ◽  
Sandwich Sheets

Three-dimensional DEFORMTM finite element simulations are performed to analyze the plastic deformation of heterogeneous sandwich sheets during rolling. The finite element code is based on a rigid-plastic model and the simulations assume that the rollers are rigid bodies and that the deformation-induced change in temperature during rolling is sufficiently small to be neglected. The rolled product is assumed to comprise a central sheet of either A3003 or A6063 aluminum alloy sandwiched between upper and lower sheets of A1100 aluminum alloy. The simulations examine the effects of the sheet thickness and reduction ratio on the maximum effective stress, maximum effective strain, Y-direction load, and maximum damage induced within the rolled product. The simulation results for the final thicknesses of the three layers in the rolled sandwich sheet are compared with the experimental measurements. Overall, the results presented in this study provide a useful insight into the deformation mechanisms involved in the rolling of heterogeneous sandwich sheets.

scholarly journals Analysis of Deformation and Prediction of Cracks in the Cogging Process for Die Steel at Elevated Temperatures

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5589
Author(s):  
Marcin Kukuryk
Keyword(s):  
Elevated Temperatures ◽  
Metal Flow ◽  
Three Dimensional ◽  
Internal Layers ◽  
The Finite Element Method ◽  
Damage Factor ◽  
Die Steel ◽  
Ductile Fractures ◽  
Thermal Phenomena ◽  
Good Agreement

In this paper, an analysis of a three-dimensional state of strain and stress in the case of the hot cogging process of X32CrMoV12-28 die steel with the application of the finite element method is presented. The results of the investigations connected with the simulation of the kinematics of metal flow and thermal phenomena are presented, accompanied by prognosing the formation of ductile fractures in the course of the hot cogging process conducted with the application of three different shape tools and of a proposed deformation criterion of the loss of cohesion. The applied anvils were found to be highly effective in the aspects of distribution of effective strains and stresses, absence of tensile stresses in the axial zones of a forging, and also of a significant thermal stability in the internal layers of a deformed material. The developed course of changes in the deformation of the damage factor in the case of forging in the investigated anvils renders it possible to predict the situation and the phase of deformation in which the loss of cohesion by a deformed material will occur. The comparison between the predicted and the experimental results showed a good agreement.

Investigation into Bicycle Front Fork Forming Process of Simulation and Experiment

2014 ◽  
Vol 626 ◽  
pp. 199-204
Author(s):  
Dyi Cheng Chen ◽  
Wen Hsuan Ku
Keyword(s):  
Finite Element ◽  
Effective Strain ◽  
Three Dimensional ◽  
Forming Process ◽  
Rigid Plastic ◽  
Billet Temperature ◽  
Finite Element Software ◽  
Plastic Deformation Behavior ◽  
Graphics Software ◽  
Three Dimensional Finite Element

This study uses the three dimensional finite element code to examine the plastic deformation behavior of bicycle front fork forging. First the paper used Solid works 2010 3D graphics software to design the bicycle front fork die, and that used rigid-plastic model finite element analytical methods, and assuming mode to be rigid body. The front fork material is titanium alloy Ti-6Al-4V. A series of simulation analyses in which the variables depend on die temperature, billet temperature, forging speed, friction factors, die angle are reveal to effective stress, effective strain, die radial load distribution and damage value for bicycle front fork forming. The simulation combined Taguchi method to analysis optimization. The results of the analysis can be used to stabilize finite element software to forming front fork, and also confirm the suitability of bicycle front fork through experiment optimization.

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