scholarly journals Finite element simulation and experimental investigation of cold forward extrusion process

2018 ◽  
Vol 178 ◽  
pp. 02010 ◽  
Author(s):  
Dorin Luca
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Element Model ◽  
Extrusion Process ◽  
The Finite Element Method ◽  
Forward Extrusion ◽  
Real Process ◽  
Element Simulation ◽  
Plastic Deformation Process ◽  
Good Agreement

Extrusion is the plastic deformation process that allows for the highest degree of complexity profiles to be obtained. This paper presents the simulation of a cold forward extrusion process using the finite element method. The results obtained show the stresses, strains and temperatures during the plastic deformation of the material, as well as the stresses and strains in the punch and die. The analysis of the results obtained for different geometric dimensions of the working tools allowed the optimization of the studied extrusion process. In order to validate the finite element model, experiments were carried out with the data acquisition from the real process, which allowed the appreciation that numerical and experimental data are found in a good agreement.

Finite-element simulation of the photoacoustic–thermal signal generation

1986 ◽  
Vol 64 (9) ◽  
pp. 1030-1036 ◽  
Author(s):  
D. Lévesque ◽  
G. Rousset ◽  
L. Bertrand
Keyword(s):  
Finite Element ◽  
Adiabatic Process ◽  
The Finite Element Method ◽  
Photoacoustic Cell ◽  
Main Interest ◽  
Great Flexibility ◽  
Coupled Equations ◽  
Thermal Signal ◽  
Element Simulation ◽  
Good Agreement

The ability to use the finite-element method to solve numerically the frequency-dependent coupled equations of the photoacoustic–thermal effect is demonstrated. Both solids and fluids are simulated by the same set of equations with temperature and displacement as variables. The main interest of this formulation lies in its great flexibility to deal with mixed fluid–solid systems. As a first application, we consider the influence of thermoacoustic coupling on the pressure in a photoacoustic cell. We show that with increasing frequency, a transition from an isothermal to an adiabatic process occurs. Subsequently, results obtained from a numerical simulation of the photoacoustic cell, which includes the effect of a residual volume, are in good agreement with existing experimental data.

scholarly journals Damage dependent material properties in a Finite Element Simulation of a hybrid forward extrusion process

2017 ◽  
Vol 207 ◽  
pp. 437-441 ◽  
Author(s):  
Stephan Hojda ◽  
Karl J.X. Sturm ◽  
Michael Terhorst ◽  
Fritz Klocke ◽  
Gerhard Hirt
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Material Properties ◽  
Extrusion Process ◽  
Forward Extrusion ◽  
Element Simulation

Compressive Behavior of AA6061 at Room Temperature and Validation of the FE Model Based on Optical 3D Measurement Technique

2013 ◽  
Vol 594-595 ◽  
pp. 909-913
Author(s):  
A.B. Abdullah ◽  
Z. Samad
Keyword(s):  
Finite Element ◽  
Measurement Technique ◽  
Room Temperature ◽  
Element Model ◽  
Surface Measurement ◽  
Fe Model ◽  
Cold Upsetting ◽  
Element Simulation ◽  
The Finite Element Model ◽  
Good Agreement

Recently, manufacturing process simulation using finite element (FE) model become important. Therefore, validation of the finite element model is crucial. This study will present validation of 2D finite element simulation of cold heading at room temperature. Validation of the simulation model is carried out by comparing the resulted bulge profile of the cold upsetting specimen to the profile of the specimen, which is obtained from an optical 3D surface measurement technique namely Infinite Focus Alicona system. Based on the result, both profiles show a very good agreement.

Finite Element Simulation on Tire Rubber Extrusion Process

2013 ◽  
Vol 683 ◽  
pp. 548-551 ◽  
Author(s):  
Jian Wu ◽  
Qiang Liu ◽  
You Shan Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Constitutive Model ◽  
Process Parameters ◽  
Element Model ◽  
Extrusion Process ◽  
Rubber Material ◽  
Element Simulation ◽  
Rubber Part

Tires are a key part of the vehicle, mainly constituted by rubber materials. Extrusion is one of the important processes of rubber part, which is critical to the quality of the tire. Therefore, it is necessary to study the extrusion process of rubber material. In this paper, a finite element model of the rubber extrusion process was developed by using the Euler-Lagrange coupling method based on the research on rubber constitutive model. Results indicated that: extrusion expansion phenomenon existed in rubber extrusion process, which was consistent with the reality; rubber extrusion process parameters can be optimized by finite element method, and the quality of tire was also improved.

scholarly journals Calculation and analysis of landing double rocker arms holding pole based on finite element simulation

2021 ◽  
Vol 2083 (3) ◽  
pp. 032017
Author(s):  
Xing Zhang ◽  
Yingpeng Shao ◽  
Yu Xing
Keyword(s):  
Finite Element ◽  
Working Conditions ◽  
Engineering Application ◽  
Element Model ◽  
The Finite Element Method ◽  
Safety Hazards ◽  
Element Simulation ◽  
Potential Safety ◽  
The Finite Element Model ◽  
Load Conditions

Abstract Landing double rocker arms holding pole are widely used in the erection of UHV construction towers. Most of the construction arms are based on experience in engineering application, and there are some potential safety hazards. In this paper, the finite element model is established based on the relevant parameters of 700×700mm2 double rocker arm holding pole, and the actual lifting conditions of the pole are analysed. The finite element method is used to simulate nine working conditions for stress analysis. The results show that the double rocker arm holding pole has good mechanical properties under rated load conditions, which verifies the reliability of the arm design. Asymmetric moment hoisting is an important factor threatening the safety of holding pole, which must be strictly controlled.

scholarly journals Effect of Ovality Length on Collapse Strength of Imperfect Sandwich Pipes Due to Local Buckling

2021 ◽  
Vol 10 (1) ◽  
pp. 12
Author(s):  
Ruoxuan Li ◽  
Bai-Qiao Chen ◽  
C. Guedes Soares
Keyword(s):  
Finite Element ◽  
Local Buckling ◽  
Element Model ◽  
Prediction Equation ◽  
External Pressure ◽  
The Finite Element Method ◽  
Collapse Strength ◽  
Calculation Results ◽  
The Relationship ◽  
Good Agreement

The effect of ovality length on imperfect sandwich pipes is investigated using the finite element method in the scenario of local buckling under external pressure. First, the finite element model of the imperfect sandwich pipelines is established in ANSYS and is validated by comparing the results from numerical simulation with those from experiments. Then, the effect of ovality features on the collapse strength of the sandwich pipes is studied. At last, based on the calculation results from 1200 cases, a prediction equation is proposed to represent the relationship between collapse strength and ovality length of imperfect sandwich pipes. Good agreement is achieved between the proposed equation and the calculation results, leading to the conclusion that the proposed simplified model can be an efficient tool in the evaluation of the local collapse strength of subsea sandwich pipes under external pressure.

Upper Bound Analysis and Finite Element Simulation of Bi-Metallic Tube Backward Extrusion

2012 ◽  
Vol 445 ◽  
pp. 155-160
Author(s):  
H. Momeni-Khabisi ◽  
H. Haghighat ◽  
M.J. Momeni-Khabisi
Keyword(s):  
Finite Element ◽  
Upper Bound ◽  
Extrusion Process ◽  
Extrusion Force ◽  
Upper Bound Method ◽  
Metallic Tube ◽  
Backward Extrusion ◽  
Element Simulation ◽  
Reduction In Area ◽  
Good Agreement

In this paper, the process of bi-metallic tube backward extrusion through a conical punch, by means of upper bound method and finite element method is investigated. A cylindrical admissible velocity field is developed and by calculating the internal, shear and frictional powers, the extrusion force is estimated. The extrusion process is also simulated by using the finite element code, ABAQUS. Analysis and simulations are done for two types of bi-metallic tubes: aluminum as core, copper as sleeve (Al-Cu) and copper as core, aluminum as sleeve (Cu-Al). The extrusion force from the upper bound method is compared with the Finite Element results. This comparison shows that the upper bound predictions are in good agreement with the Finite Element results. The results also show that, the extrusion force in the case of Al-Cu tube is smaller than Cu-Al tube and in both types of bi-metallic tubes, the aluminum leaves the deformation zone sooner than the copper. Finally the effects of various extrusion parameters, such as the friction factor, reduction in area and semi-punch angle upon the extrusion force are investigated and the optimum semi-punch angle is determined.

Study on Prediction of Machining Distortion for Titanium Alloy Aircraft Monolithic Component by FEM

2010 ◽  
Vol 97-101 ◽  
pp. 2951-2954
Author(s):  
Yong Yang ◽  
Hui Hui Li ◽  
Guang Yao Meng
Keyword(s):  
Finite Element ◽  
Titanium Alloy ◽  
Model Material ◽  
Machining Process ◽  
The Finite Element Method ◽  
Machining Distortion ◽  
Element Simulation ◽  
Key Technologies ◽  
Monolithic Component ◽  
Good Agreement

A physics-based material processing simulation is approached to research the machining distortion for titanium alloy aircraft monolithic component by the finite element method (FEM). Several key technologies, such as material constitutive model, material removal methodology of machining process, determination and application of cutting loads, have been implemented to improve the accuracy of finite element simulation. To verify the FEM result, an experiment is carried out. The distortion position and dimension of aircraft monolithic component resulting from FEM show a good agreement with the experiment result, which indicates that the key technologies presented in the paper are practicable and can be used to simulate the machining process of monolithic component to predict its distortion.

scholarly journals Influence of Process and Billet Parameters on the Dimensional Accuracy of Hexagonal Pipes During Mandrel Drawing

2021 ◽  
Vol 346 ◽  
pp. 01042
Author(s):  
Evgenii Raskatov ◽  
Anastasia Parshina
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Finite Element Model ◽  
Deformation Process ◽  
Dimensional Accuracy ◽  
Element Model ◽  
Plastic Deformation Process ◽  
The Way

The object of the article is hexagonal profile tubes with a round inner hole. Tubes of such configuration have wide enough application, however the way of their obtaining by drawing in profile tool is insufficiently investigated. The paper is devoted to description of creation of finite element model of plastic deformation process of pipes, the basic computational capabilities of the model are given, a number of conclusions made on the basis of modelling results are given.

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