Study on Metal Forming by Macro-Micro Combine Numerical Analysis

2007 ◽  
Vol 340-341 ◽  
pp. 671-676
Author(s):  
Shao Rui Zhang ◽  
Da Yong Li ◽  
Zhong Wei Yin ◽  
Ying Hong Peng ◽  
Fei Zhou
Keyword(s):  
Metal Forming ◽  
Deformation Process ◽  
Metal Flow ◽  
Yield Function ◽  
Slip Systems ◽  
Crystallographic Slip ◽  
Deformation Properties ◽  
Simulation Results ◽  
True Relation ◽  
Anisotropy Coefficients

It has long been found that the crystal orientations would induce macroscopic anisotropy during deformation process, and then affect the deformation properties of sheet metal. So it is very important to find the true relation between texture distribution and macroscopic anisotropy. In this paper, the anisotropy coefficients of the yield function are fitted by Taylor factor and crystal plastic model. Metal flow is assumed to occur by crystallographic slip on given slip systems within each crystal. Then this simulation results are compared with those of microscopic crystal plastic method.

Anti-Extrusion Process in the Performance of Different Parameters on the Analysis of Metals

2011 ◽  
Vol 337 ◽  
pp. 456-459 ◽  
Author(s):  
Han Dong Zhao ◽  
Hua Zhang ◽  
Peng Sun ◽  
Fei Li
Keyword(s):  
Process Parameters ◽  
Metal Forming ◽  
Metal Flow ◽  
Extrusion Process ◽  
Flow Speed ◽  
Simulation Results ◽  
Pressure Changes

This paper mainly introduces metal forming on extrusion simulations. Different process parameters of the simulation results are analyzed, such as ingots by billet pressure changes, change of temperature, metal flow speed of different process, and the metal performance changes caused by them are discussed.

A Novel Severe Plastic Deformation Process for Shear Deformation and Grain Refinement of Bulk Materials

2013 ◽  
Vol 829 ◽  
pp. 15-19 ◽  
Author(s):  
Mehdi Montazeri-Pour ◽  
Mohammad Habibi-Parsa
Keyword(s):  
Deformation Process ◽  
Metal Flow ◽  
Metallic Materials ◽  
Plastic Shear ◽  
Bulk Materials ◽  
Microstructure Characteristics ◽  
Plastic Deformation Process ◽  
Plastic Shear Strain ◽  
Commercial Code ◽  
Simulation Results

A novel experimental technique called "Multi-Axial Incremental Shearing" (MAIS) is proposed to impose plastic shear strain to the bulk metallic materials. The evolution of strain during MAIS processing of AA1100 alloy has been studied by employing 3D finite element modeling. The commercial code DEFORM was used to analyze the deformation and evolution of the working load with rams displacement as the material passes through the die. Simulation results showed that a large amount of accumulative strain can be applied to the sample without change of its dimensions. In order to verify the metal flow and microstructure characteristics, Sn-1wt.% Bi alloy specimens as the representative of the soft metals have been deformed by MAIS process.

To the Influence of the Deformation Speed on Hardening Process during the Cold Sheet Forming

2018 ◽  
Vol 284 ◽  
pp. 513-518 ◽  
Author(s):  
Sergey A. Tipalin ◽  
Michael A. Petrov ◽  
N.F. Shpunkin
Keyword(s):  
Sheet Metal Forming ◽  
Metal Forming ◽  
Sheet Material ◽  
Thin Sheet ◽  
Hardening Process ◽  
Deformation Speed ◽  
Thin Sheet Material ◽  
Simulation Results ◽  
Hardening Curve ◽  
Material Forming

The accuracy of the simulation results of stamping processes of thin sheet material depends on the correct properties’ specification, namely stamping ability. Experiments have been carried out and the influence of the deformation speed on the hardening exponent during cold sheet metal forming was studied. It was found out, that strain changed 100 times can influence the strain grade of the hardening curve of about 10%. This regularity has been taken into consideration prior to the calculation in any CAE-software for material forming.

A Study of Metal Flow Ahead of Tool Face With Large Negative Rake Angle

1982 ◽  
Vol 104 (3) ◽  
pp. 319-325 ◽  
Author(s):  
Y. Kita ◽  
M. Ido ◽  
N. Kawasaki
Keyword(s):  
Deformation Process ◽  
Metal Flow ◽  
Close Relation ◽  
Rake Angle ◽  
High Quality ◽  
Flow Lines ◽  
Stress Changes ◽  
Chip Formation Mechanism ◽  
Maximum Increment ◽  
Side Flow

Although the chip formation mechanism by a tool having a large negative rake angle is not well known, it is very important to make the process clear in order to get high quality in finished surfaces. In this paper, the behavior of material ahead of a tool face with a large negative rake angle is examined by means of low speed machining on lead. The deformation process of the material is investigated by the deformation study combining a finite element method with a grid line method. During cutting, the deformation process of grid lines which were drawn on the sides of testpieces was observed through a side glass which restricted the side flow of material. Cutting force was measured by a dynamometer consisting of an elongated octagonal ring with strain wire gages. As a result it was found that the shear stress on the slip line of maximum increment of shear strain is nearly constant, but the compressive stress changes along the line. It was concave near the top of cutting edge and convex near the surface of the test piece. The position of the change of polarity in the slope shifted depending on the rake angle of the tool. This phenomenon is considered to have close relation with the stagnant tip, which decides not only the size of chip, but also whether or not a chip will be formed. Flow lines of material and the deformed region ahead of tool faces with different negative rake angles were also obtained and they were compared with each other.

Numerical Simulation on Thixo-Forging of Magnesium Matrix Composite

2011 ◽  
Vol 189-193 ◽  
pp. 2535-2538 ◽  
Author(s):  
Hong Yan ◽  
Wen Xian Huang
Keyword(s):  
Numerical Simulation ◽  
Matrix Composite ◽  
Metal Flow ◽  
Magnesium Matrix Composite ◽  
Magnesium Matrix ◽  
Simulation Based ◽  
Prior Literature ◽  
Simulation Results ◽  
Computer Numerical Simulation ◽  
Good Agreement

The thixo-forging of magnesium matrix composite was analyzed with computer numerical simulation based on rigid viscoplastic finite element method. The constitutive model of SiCp/AZ61 composite was established in our prior literature. Behavior of metal flow and temperature field were obtained. The differences between traditional forging and thixo-forging processes were analyzed. Results indicated that thixo-forging was better in filling cavity than forging. Simulation results were good agreement with experimental ones.

In-Process Visualisation for Deformation Monitoring and Analysis of Sheet Metal Forming Processes

2013 ◽  
Vol 677 ◽  
pp. 384-387 ◽  
Author(s):  
Wai Kei Ricky Kot ◽  
Luen Chow Chan
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Deformation Process ◽  
Deformation Monitoring ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Profile Data ◽  
Profile Change

In this paper, a visualisation system will be discussed that can be used to capture the deformation profile of the sheet blank during sheet metal forming processes, such as deep drawing and shape forming. The visualisation system utilizes a 2D laser displacement sensor for deformation profile acquisition. The sensor is embedded in the die and the laser propagates through the die to detect the profile change of the specimen concealed in the die during operation. The captured profile data will be collected, manipulated and transferred to a monitor for display via a controller. This visualisation of the deformation profile will provide engineers and researchers with an intuitive means of analysing and diagnosing the deformation process during sheet metal forming.

Metal Flow and Die Filling in Coining of Micro Structures with and without Flash

2005 ◽  
Vol 6-8 ◽  
pp. 631-638 ◽  
Author(s):  
M. Thome ◽  
Gerhard Hirt ◽  
B. Rattay
Keyword(s):  
Numerical Simulations ◽  
Sheet Metal ◽  
Metal Forming ◽  
Production Systems ◽  
Metal Flow ◽  
Small Scale ◽  
Die Filling ◽  
Metal Plates ◽  
Micro Structures ◽  
Channel Structures

The continuing miniaturization of production systems and products poses a challenge for metal forming technologies to produce precise small scale products with microscopic geometric details. Thin metal plates with channel structures are considered to be typical examples for microfluidic applications [1,2]. In this study the coining process of sheet metal to produce channel and rib structures is examined in terms of geometrical die parameters and tool design. For this reason extensive experimental series and numerical simulations have been realized and evaluated.

scholarly journals Finite element simulation of sink pass round tubes using Ansys

2012 ◽  
pp. 179-188 ◽  
Author(s):  
M.P. Nagarkar ◽  
R.N. Zaware ◽  
S.G. Ghalme
Keyword(s):  
Modeling And Simulation ◽  
Product Quality ◽  
Metal Forming ◽  
Cold Working ◽  
Ansys Software ◽  
Simulation Techniques ◽  
Element Simulation ◽  
Simulation Results ◽  
Von Mises ◽  
Von Mises Stresses

Modeling and simulation of metal forming processes are increasingly in demand from the industry as the resulting models are found to be valuable tools considering the optimization of the existing and development of new processes. By the application of modeling and simulation techniques, it is possible to reduce the number of time-consuming experiments such as prototyping. Seamless tubes of various sizes and shapes are manufactured by various processes like sinking, fixed plug, floating plug, moving mandrel, cold working and hot working. The present work deals with the simulation of round tubes while passing through the sink pass, using ANSYS software. The simulation results are the displacement and von Mises stresses. The procedure can be used to improve the product quality and to study the effect of various parameters like die angle on the product quality.

Numerical Evaluation of Crashworthiness of Automotive Sheets

2007 ◽  
Vol 345-346 ◽  
pp. 1537-1540
Author(s):  
Han Sun Ryou ◽  
Myoung Gyu Lee ◽  
Chong Min Kim ◽  
Kwan Soo Chung
Keyword(s):  
Crystal Structures ◽  
Yield Surface ◽  
Numerical Evaluation ◽  
Kinematic Hardening ◽  
Sheet Thickness ◽  
Back Stress ◽  
Yield Function ◽  
Chaboche Model ◽  
Simulation Results ◽  
Function Shape

Crash simulations were performed for automotive sheets. To understand the influence of crystal structures in sheet materials on crashworthiness, the effect of the yield function shape was studied by adopting the recently developed non-quadratic anisotropic yield surface, Yld2004-18p. The effect of the back-stress was also investigated by comparing simulation results obtained for the isotropic, kinematic and combined isotropic-kinematic hardening laws based on the modified Chaboche model. In addition, the effects of anisotropy and sheet thickness on crashworthiness were evaluated.

Sign in / Sign up

Export Citation Format

Share Document