The Effect of Anisotropy and Work-Hardening Characteristics on the Stress and Strain Distribution in Deep Drawing

1966 ◽  
Vol 88 (4) ◽  
pp. 443-448 ◽  
Author(s):  
D. C. Chiang ◽  
Shiro Kobayashi
Keyword(s):  
Work Hardening ◽  
Deep Drawing ◽  
Strain Theory ◽  
Stress And Strain ◽  
Drawing Ratio ◽  
Punch Force ◽  
Fortran Language ◽  
Incremental Strain ◽  
The University ◽  
Stress And Strain Distribution

In the process of the deep drawing of a cup, anisotropy and work-hardening characteristics of the material were introduced, by use of the incremental strain theory, into the calculation of stress and strain distributions and the punch force, and the effect of these characteristics on the limiting drawing ratio was obtained. Calculations were carried out by using the FORTRAN language on an IBM 7094 computer at the University of California.

scholarly journals Numerical Solution of a Deep-Drawing Problem

1977 ◽  
Vol 99 (1) ◽  
pp. 206-209 ◽  
Author(s):  
E. I. Odell ◽  
W. E. Clausen
Keyword(s):  
Work Hardening ◽  
Deep Drawing ◽  
Numerical Technique ◽  
Strain Theory ◽  
Membrane Theory ◽  
Rigid Plastic ◽  
Normal Anisotropy ◽  
Membrane Shell ◽  
Plastic Analysis ◽  
Incremental Strain

A rigid-plastic analysis of the axisymmetric deep-drawing problem is made using a special numerical technique. The effects of work-hardening, friction, and normal anisotropy have been included. Incremental strain theory is used to obtain results for both bending and membrane shell theories. These results are then compared. The authors feel that membrane theory gives very good results and should be used in the future to analyze any relatively thin cups.

In-Plane Torsion Testing of Sheet Metal

1977 ◽  
Vol 19 (5) ◽  
pp. 213-220 ◽  
Author(s):  
R. Sowerby ◽  
Y. Tomita ◽  
J. L. Duncan
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Work Hardening ◽  
Finite Element Approximation ◽  
Stress And Strain ◽  
Element Approximation ◽  
The Finite Element Method ◽  
Hardening Material ◽  
Torsion Testing ◽  
Stress And Strain Distribution

In this paper, the ‘in-plane’ torsion testing of sheet metal is examined. The test itself was first proposed by Marciniak in order to ascertain the work hardening behaviour and fracture strain of sheet metals. In the original work, the analysis was based on the assumption that the material was rigid-work hardening. The present work attempts a more rigorous solution, assuming the material to be elastic-work hardening. A finite-element approximation is employed to calculate the stress and strain distribution across the sheet metal annulus at various stages in the deformation process. A comparison is made between the results from the finite-element method and those based on a rigid-work hardening material. For certain annulus geometries, excellent agreement is obtained between both sets of results.

Effect of Geometries of Die/Blank Holder and Punch Radii in Angular Deep-Drawing Dies on DP Steel Formability

2015 ◽  
Vol 813-814 ◽  
pp. 269-273 ◽  
Author(s):  
P. Venkateshwar Reddy ◽  
S. Hari Prasad ◽  
Perumalla Janaki Ramulu ◽  
Sirish Battacharya ◽  
Daya Sindhu Guptha
Keyword(s):  
Deep Drawing ◽  
Thickness Distribution ◽  
Frictional Coefficient ◽  
Drawing Ratio ◽  
Drawing Process ◽  
Dp Steel ◽  
Punch Force ◽  
Blank Holder ◽  
Deep Drawing Process ◽  
Drawing Dies

In recent days deep-drawing is one of the most important methods used for sheet metal forming. The geometries of die/blank holder and punch are one of the parameters for deep-drawing. This paper presents an attempt to determine the effect of different geometries of die/blank holder, punch radii and blank holding force on deep drawing process for the formability of DP Steel of 1mm sheet. The numerical simulations are performed for deep drawing of cylindrical cups at a constant frictional coefficient of 0.12 and different blank holding forces of 10, 15 and 20kN are used. For numerical simulation PAM STAMP 2G a commercial FEM code in which Hollomon’s power law and Hills 1948 yield’s criterion is used. The die/blank holder profile used with an angles of α=0°, 12.5°, 15° and die/punch profile with a radii of R= 6 and 8mm were simulated to determine the influence of punch force and thickness distribution on the limit drawing ratio. The aim of this study is to investigate the effect of tool geometries on drawability of the deep-drawing process.

Analysis of the Possibility to Simulate a 3D Single-Roll Burnishing Process Using FEA

2002 ◽  
Author(s):  
Sorin Neagu-Ventzel ◽  
Liviu C. Luca ◽  
Sorin Cioc ◽  
Ioan Marinescu
Keyword(s):  
Strain Distribution ◽  
Stress And Strain ◽  
Initial Surface ◽  
Commercial Software ◽  
Workpiece Material ◽  
Final Shape ◽  
The Real ◽  
Burnishing Process ◽  
The University ◽  
Stress And Strain Distribution

This simulation follows research conducted at The University of Toledo on single roll burnishing. A couple of FEM models using a commercial software have been developed for investigating stress and strain distribution within the workpiece material. Based on the data collected and analyzed from both a simulated and experimental indentation, adjustment of the initial surface of roll was performed, so that to correspond to the final shape of the real roll when the nominal load is reached. Finally, the burnishing process is simulated and some results are shown. The model developed in this paper could be used to predict stress and strain distribution in the workpiece material.

Reverse deep drawing process: Material anisotropy and work-hardening effects

2017 ◽  
Vol 233 (4) ◽  
pp. 699-713 ◽  
Author(s):  
Khadija Ben Othmen ◽  
Kacem Sai ◽  
Pierre-Yves Manach ◽  
Khaled Elleuch
Keyword(s):  
Work Hardening ◽  
Deep Drawing ◽  
Kinematic Hardening ◽  
Rolling Direction ◽  
Constitutive Models ◽  
Uniaxial Tensile ◽  
Shear Tests ◽  
Punch Force ◽  
Yield Criteria ◽  
Reverse Deep Drawing

The present work aims to study the constitutive models’ influence on the reverse deep drawing simulation of cylindrical cups. Several constitutive laws were considered to predict the combined effects of anisotropy as well as the changes in strain path direction of the stainless steel. To this end, a number of models were used, worth mentioning among which are the isotropic with nonlinear kinematic hardening laws, along with the isotropic von Mises and anisotropic Hill’48 yield criteria. For the models’ parameters identification, uniaxial tensile and shear tests at several orientations to the rolling direction as well as reversed shear tests were carried out. Then, a subsequent comparison between experimental data and numerical simulations of reverse deep drawing tests were performed, using the finite element code Abaqus/Explicit. On the basis of the major reached results, it has been found that for the first stage, whatever the yield criteria used and for all the hardening models, the numerical punch-force evolution correlates well with the experimental one. For the second stage, the punch-force evolution was found to be remarkably more influenced by the yield criteria than by the kinematic laws. The major strain distribution greatly depends on the yield criteria. Meanwhile, it was slightly linked to the work hardening.

The Status Quo of Hemispherical Parts Stretch Forming with Research and Analysis

2014 ◽  
Vol 971-973 ◽  
pp. 868-871
Author(s):  
Ming Qing Wu ◽  
Ma Kun Guo
Keyword(s):  
Deep Drawing ◽  
Thickness Distribution ◽  
Status Quo ◽  
Stress And Strain ◽  
Important Process ◽  
Forming Process ◽  
Mechanical Parts ◽  
The Status ◽  
Stress And Strain Distribution ◽  
Theory And Experiment

the study on deep drawing of cylindrical carried out from two aspects of theory and experiment. For the numerical analysis of hemispherical parts deep drawing, to establish the precise forming process of stress and strain distribution and the shape and thickness distribution of mechanical parts model, is the basis of the study of wrinkling and rupture, to predict forming process possible defects such as wrinkling and rupture, and identify some of the important process parameters provide a theoretical basis. Domed parts drawing status is analyzed, and adopts the theory to carry on the numerical simulation were determined.

Effect of pipe expansion on the redistribution of residual stresses after molding

2020 ◽  
Vol 10 (2) ◽  
pp. 122-126
Author(s):  
Nikolay A. Makhutov ◽  
◽  
Dmitry A. Neganov ◽  
Eugeny P. Studenov ◽  
◽  
...  
Keyword(s):  
Residual Stresses ◽  
Strain Distribution ◽  
Strain State ◽  
Stress And Strain ◽  
Cylindrical Shape ◽  
Pipe Material ◽  
Pipe Expansion ◽  
Calculation Results ◽  
Residual Deformations ◽  
Stress And Strain Distribution

In the factory, pipes for trunk oil and oil product pipelines are obtained by molding and welding. To ensure a cylindrical shape and reduce technological residual stresses, expansion technology is used. Pipe expansion causes a significant change in the values of residual deformations and stresses. The article presents both the calculation results and graphs regarding stress and strain distribution during bending of the stock and their redistribution after expansion. Based on the calculation results, the final total values of residual stresses and residual deformations caused by bending and expansion were stated to be important components of the stress-strain state observed in pipelines being operated under cyclic loading, as well as those used in assessing how degradation affects the ductility of the pipe material. These factors were concluded as being reasonably taken into account when performing verification calculations regarding long-running pipelines if, based on their diagnostics and analysis, their state does not meet modern strength requirements.

ALLEGHENY LUDLUM TYPE 305

Alloy Digest ◽  
2002 ◽  
Vol 51 (1) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Work Hardening ◽  
Deep Drawing ◽  
Heat Treating ◽  
Cold Forming ◽  
Temperature Performance ◽  
Low Rate

Abstract Allegheny Ludlum Type 305 (S30500) stainless steel is used for applications requiring a low rate of work hardening during severe cold-forming operations such as deep drawing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-840. Producer or source: Allegheny Ludlum Corporation.

Sign in / Sign up

Export Citation Format

Share Document