FE-analysis and in situ visualization of pressure-, slip-rate-, and temperature-dependent coefficients of friction for advanced sheet metal forming: development of a novel coupled user subroutine for shell and continuum discretization

2015 ◽  
Vol 81 (1-4) ◽  
pp. 397-410 ◽  
Author(s):  
F. Klocke ◽  
D. Trauth ◽  
A. Shirobokov ◽  
P. Mattfeld
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Slip Rate ◽  
Fe Analysis ◽  
Temperature Dependent ◽  
User Subroutine ◽  
In Situ Visualization

scholarly journals In-situ observation of lubricant flow on laser textured die surface in sheet metal forming

2017 ◽  
Vol 207 ◽  
pp. 2209-2214 ◽  
Author(s):  
Jochen Vorholt ◽  
Tetsuhide Shimizu ◽  
Hiroyuki Kobayashi ◽  
Lukas Heinrich ◽  
Hendrik Flosky ◽  
...  
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
In Situ Observation ◽  
Lubricant Flow ◽  
Die Surface

scholarly journals Effects of yield point and plastic anisotropy on results of elastic-plastic finite element analysis of tension leveling

2021 ◽  
Author(s):  
Changxiang Fan ◽  
Honghao Wang ◽  
Ye Zhang ◽  
Dexin Chen ◽  
Jing Guo ◽  
...  
Keyword(s):  
Finite Element ◽  
Constitutive Model ◽  
Yield Point ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Previous Investigation ◽  
Plastic Anisotropy ◽  
Fe Analysis ◽  
Fe Model

Abstract Tension leveling is an important industrial process to eliminate the flatness defects and residual stresses of metal strips to provide high-quality sheet metals for subsequent sheet metal forming. The finite element (FE) method can be applied to elucidate the effects of process parameters on the quality of sheets after tension leveling for various materials. In our previous investigation, an accurate FE model considering the anisotropy and cyclic plasticity of materials has been established for the elastic-plastic FE analysis of tension leveling. In this study, we further studied the effects of the yield point and plastic anisotropy on tension leveling using the FE model established in our previous investigation. Aiming at improving the accuracy of simulation, a modified constitutive model was developed to describe the anisotropic hardening of materials under cyclic loading. The modified constitutive model was implemented into Abaqus/Standard as a user-defined material (UMAT) subroutine to simulate the development of the anisotropy in materials during tension leveling. The modified model was also applied to the FE analysis of sheet metal forming processes to demonstrate its simulation capability and accuracy.

ИССЛЕДОВАНИЕ ТОЧНОСТИ ДЕТАЛЕЙ, ПОЛУЧАЕМЫХ ПРИ РАЗДЕЛИТЕЛЬНЫХ ОПЕРАЦИЯХ В ПЕРЕНАЛАЖИВАЕМЫХ ШТАМПАХ

2018 ◽  
pp. 52-63
Author(s):  
Е. А. Фролов ◽  
В. В. Агарков ◽  
С. И. Кравченко ◽  
С. Г. Ясько
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Balance Method ◽  
Experiment Planning ◽  
Practical Recommendations

To determine the accuracy of the readjustable punches for separating operations (perforation + punching out) of sheet-metal forming, the accuracy parameters were analyzed using the random balance method using the method of experiment planning. Analytical dependencies are obtained to determine the values of deviation of the outer and inner contour dimensions of perforated and punched out sheet parts. From the dependencies obtained, it is possible to estimate and predict the value of deviation in the dimensions of the resulting part at any time during the operation of the punch. Practical recommendations on the calculation of the actuating dimensions of the working elements (stamping punch, matrix) of readjustable punches are offered.

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