The 3D Modeling of Dies Based on UG and Numerical Simulation of the Heat Rheological Forming of Titanium Alloy Vane Disk

2007 ◽  
Vol 340-341 ◽  
pp. 725-729 ◽  
Author(s):  
Ying She Luo ◽  
Min Yu ◽  
Xiang Hua Peng
Keyword(s):  
Titanium Alloy ◽  
Deformation Characteristic ◽  
Equivalent Strain ◽  
Variation Principle ◽  
Forming Process ◽  
Field Temperature ◽  
Tc11 Titanium Alloy ◽  
Rheological Forming ◽  
Deform 3D ◽  
Low Strain Rate

The heat rheological forming of the TC11 titanium alloy vane disk has been studied. The dies of rheological forming were 3D-modeled based on UG and the heat rheological forming of the TC11 titanium alloy under a certain temperature and a low strain rate was analyzed by DEFORM 3D based on variation principle of rigid viscoplastic non-compressed material. A series of results including rheological forming procedure, equivalent strain field, temperature field and load-stroke curves of punch and cavity die, were obtained by finite element method. The deformation characteristic of the TC11 titanium alloy was well known and its heat rheological forming process and parameters were determined. Moreover, the local underfilled phenomenon in practical manufacture was predicted and analyzed, and we found that the defects could be restricted by reducing the forming velocity.

Research on Creep Constitutive Model of TC11 Titanium Alloy Based on RBFNN

2008 ◽  
Vol 575-578 ◽  
pp. 1050-1055 ◽  
Author(s):  
Xiang Hua Peng ◽  
Ying She Luo ◽  
Jing Ye Zhou ◽  
Min Yu ◽  
Tao Luo
Keyword(s):  
Neural Network ◽  
Titanium Alloy ◽  
Knowledge Base ◽  
Rbf Neural Network ◽  
Creep Testing ◽  
Primary Model ◽  
Constitutive Mode ◽  
Creep Constitutive Model ◽  
Tc11 Titanium Alloy ◽  
Rheological Forming

The paper is aimed to exploit a creep constitutive mode of TC11 titanium alloy based on RBF neural network. Creep testing data of TC11 titanium alloy obtained under the same temperature and different stress are considered as knowledge base and the characteristics of rheological forming of materials and radial basis function neural network (RBFNN) are also combined when exploiting the model. A part of data extracted from knowledge base is divided into two groups: one is learning sample and the other testing sample, which are being performed training, learning and simulating. Then predicting value is compared with the creep testing value and the theoretical value deduced by primary model, which validates that the RBFNN model has higher precision and generalizing ability.

Numerical Analysis of Rolling Extrusion Process of a Toothed Shaft from Titanium Alloy Ti6Al4V

2014 ◽  
Vol 622-623 ◽  
pp. 1215-1220
Author(s):  
Jarosław Bartnicki ◽  
Janusz Tomczak ◽  
Zbigniew Pater
Keyword(s):  
Titanium Alloy ◽  
Numerical Analysis ◽  
Metal Flow ◽  
Fem Analysis ◽  
Extrusion Process ◽  
Technological Parameters ◽  
Forming Process ◽  
Radial Forces ◽  
Titanium Alloy Ti6al4v ◽  
Deform 3D

This paper presents results of numerical calculations of rolling extrusion process of a toothed shaft made from titanium alloy Ti6Al4V. FEM analysis was conducted applying the software DEFORM 3D for the process chosen technological parameters. The kinematics of metal flow in the area of the formed teeth was analyzed. Distributions of stresses, strains and temperatures during teeth forming were determined. Calculated values of axial and radial forces and moments acting on rotating roll tools allow for designing of tools for experimental verification of the designed forming process.

Chip Prediction in Finite Element Modeling of the Chip Formation Process during Cutting Ti-6Al-4V Alloy

2011 ◽  
Vol 418-420 ◽  
pp. 1148-1153
Author(s):  
Yu Gang Ye
Keyword(s):  
Finite Element ◽  
Titanium Alloy ◽  
Strain Rate ◽  
Equivalent Stress ◽  
Cutting Speed ◽  
Chip Thickness ◽  
Equivalent Strain ◽  
Forming Process ◽  
Serrated Chip ◽  
Equivalent Strain Rate

Based on the theory of adiabatic shearing, the forming process of a serrated chip during cutting Ti-6Al-4V titanium alloy was analyzed by comparing the results of the finite element (FE) calculations with the cutting experiments. The results show that the equivalent stress, equivalent strain and equivalent strain rate within a ribbon chip varied a little, but they varied a lot within a serrated chip. Moreover, the effect of cutting speed on equivalent strain rate is greater than on the equivalent stress and equivalent strain within a serrated chip. It can also be found from the results that there are small gaps between the simulation results and experimental results for the chip thickness and sawtooth height, while there is a big gap for saw-tooth pitch. This means that the simulation model has its limitations for accurate simulation of micro-geometric shape of a chip during cutting the Ti-6Al-4V titanium alloy, and further research remains to be done.

Rheological Constitutive Model Depending upon Temperature and Strain Rate of Sheet TC1 Titanium Alloy

2011 ◽  
Vol 311-313 ◽  
pp. 596-599
Author(s):  
Liu Yang ◽  
Ying She Luo ◽  
Bo Yang
Keyword(s):  
Titanium Alloy ◽  
Strain Rate ◽  
Constitutive Models ◽  
Experimental Results ◽  
Strain Rates ◽  
Standard Samples ◽  
Forming Process ◽  
Calculation Results ◽  
Different Temperatures ◽  
Rheological Forming

In order to achieve the numerical calculating rheological forming process of materials, a series of tension experiments under the different temperatures and different strain rates were done on the standard samples of sheet TC1 titanium alloy. The experimental results were analyzed theoretically and the rheological stress constitutive models of TC1 titanium alloy are built combining the strong points of the Perzyna model and Johnson-Cook model. Comparing the calculation results conducted from the model with the experimental results, it proves that the model can reflect the temperature effect and strain rate effect of TC1 titanium alloy.

Influences of Laser Solid Forming Process on Microstructure and Mechanical Properties of TC11 Titanium Alloy

Applied laser ◽  
2012 ◽  
Vol 32 (6) ◽  
pp. 479-483
Author(s):  
赵卫强 Zhao Weiqiang ◽  
陈静 Chen Jing ◽  
杨杰穷 Yang Jieqiong ◽  
张强 Zhang Qiang ◽  
林鑫 Lin Xin
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Forming Process ◽  
Microstructure And Mechanical Properties ◽  
Laser Solid Forming ◽  
Tc11 Titanium Alloy

Analysis on Temperature Field of Work-Piece during Cross Wedge Rolling

2011 ◽  
Vol 230-232 ◽  
pp. 352-356
Author(s):  
Wen Ke Liu ◽  
Kang Sheng Zhang ◽  
Zheng Huan Hu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Metal Flow ◽  
Work Piece ◽  
Contact Deformation ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Rigid Plastic ◽  
Finite Element Software ◽  
Deform 3D

Based on the rigid-plastic deformation finite element method and the heat transfer theories, the forming process of cross wedge rolling was simulated with the finite element software DEFORM-3D. The temperature field of the rolled piece during the forming process was analyzed. The results show that the temperature gradient in the outer of the work-piece is sometimes very large and temperature near the contact deformation zone is the lowest while temperature near the center of the rolled-piece keeps relatively stable and even rises slightly. Research results provide a basis for further study on metal flow and accurate shaping of work-piece during cross wedge rolling.

The Strain Analysis at the Broadening Stage of the Hollow Railway Axle by Multi-Wedge Cross Wedge Rolling

2014 ◽  
Vol 494-495 ◽  
pp. 457-460 ◽  
Author(s):  
Bin Hu ◽  
Xue Dao Shu ◽  
Peng Hui Yu ◽  
Wen Fei Peng
Keyword(s):  
Production Efficiency ◽  
Strain Analysis ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Element Analysis ◽  
Forming Mechanism ◽  
Railway Axle ◽  
The Finite Element Analysis ◽  
Scientific Significance ◽  
Deform 3D

The paper is based on the newest hollow railway axle, which utilizes the Pro/E designed multi-wedge cross wedge rolling (MCWR) model, utilizes the finite element analysis software DEFORM-3D to complete the numerical simulation about the whole stage of the hollow railway axle forming process, and analyzes the strain rule at the broadening stage of the hollow railway axle, especially conducts a detailed research on forming character into the strain rule at the multi-wedge transition stage, and finally gets the strain forming mechanism of the hollow railway axle at the broadening stage. The result of the research on the strain rule poses great scientific significance on enhancing the product quality and the production efficiency of the hollow railway axle, and improving the theory of multi-wedge cross wedge rolling.

Finite Element Simulation and Experimental Study on Isothermal Forging Technology for a Complex-Shaped Titanium Alloy Wing

2013 ◽  
Vol 575-576 ◽  
pp. 523-526
Author(s):  
Feng Cheng ◽  
Hong Yan Jiang
Keyword(s):  
Titanium Alloy ◽  
Variable Cross Section ◽  
Hydraulic Press ◽  
Asymmetric Structure ◽  
Variable Cross ◽  
Forming Process ◽  
Isothermal Forging ◽  
Filling Ability ◽  
Simulation Results ◽  
Mechanical Performances

A closed isothermal forging process was adopted for precision forming of the Ti-6Al-4V wing with a variable cross-section asymmetric structure. Firstly, simulations under different process parameters, such as the deformation temperature, punchs velocity et al. were analyzed with DEFORM-3D software to eliminate the defects in the isothermal forming process. The simulation results demonstrated that the loads during isothermal deformation were determined not just by the forging temperature but the punchs velocity, the less velocity of punch, the better filling ability, and yet temperatures from 900 to 950°C had less influence on filling ability. To verify the validity of simulation results, the isothermal forging experiment was carried out on an isothermal forging hydraulic press (THP10-630). It is demonstrated that the optimized billet dimension can ensure the quality of forging part and the titanium alloy wing component with complex shape was successfully forged with the punch speed of 0.1mm/s at 950°C and its mechanical performances were improved.

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