scholarly journals Hole Expansion Simulations of TWIP Steel Sheet Sample

2010 ◽  
Author(s):  
L. Xu ◽  
L. Chen ◽  
D. Steglich ◽  
B. C. Decooman ◽  
F. Barlat ◽  
...  
Keyword(s):  
Steel Sheet ◽  
Twip Steel ◽  
Hole Expansion ◽  
Sheet Sample

Hole expansion of advanced high strenth steel sheet sample

2010 ◽  
Vol 3 (S1) ◽  
pp. 247-250 ◽  
Author(s):  
L. Xu ◽  
L. Chen ◽  
B. C. De Cooman ◽  
D. Steglich ◽  
F. Barlat
Keyword(s):  
Steel Sheet ◽  
Hole Expansion ◽  
Sheet Sample

Anisotropic Plastic Behavior of TRIP 780 Steel Sheet in Hole Expansion Test

2012 ◽  
Vol 504-506 ◽  
pp. 89-94 ◽  
Author(s):  
Sansot Panich ◽  
Vitoon Uthaisangsuk ◽  
Surasak Suranuntchai ◽  
Suwat Jirathearanat
Keyword(s):  
Steel Sheet ◽  
Flow Behavior ◽  
Plastic Anisotropy ◽  
Yield Potential ◽  
Uniaxial Tensile ◽  
Plastic Behavior ◽  
Biaxial Test ◽  
Hole Expansion ◽  
Expansion Test ◽  
Hole Expansion Test

Plastic behavior of advanced high strength steel sheet of grade TRIP780 (Transformation Induced Plasticity) was investigated using three different yield functions, namely, the von Mises’s isotropic, Hill’s anisotropic (Hill’48), and Barlat’s anisotropic (Yld2000-2d) criterion. Uniaxial tensile and balanced biaxial test were conducted for the examined steel in order to characterize flow behavior and plastic anisotropy in different stress states. Additionally, disk compression test was performed for obtaining the balanced r-value. According to the different yield criteria, yield stresses and r-values were calculated for different directions and then compared with experimental data. To verify the modeling accuracy, a hole expansion test was carried out experimentally and numerically by FE simulation. Stress-strain curve from the biaxial test was described using voce and swift hardening models. Punch load and stroke, final hole radius, and strain distribution on specimen surface along the hole circumference and the specimen diameter in rolling and transverse directions were determined and compared with the experimental results. It was found that the simulations applying Yld2000-2d yield function provided an acceptable agreement. Consequently, it is noted that the anisotropic yield potential significantly affects the accuracy of the predicted deformation behavior of sheet metal subjected to hole expanding load.

scholarly journals Effect of Anisotropic Yield Functions on the Accuracy of Hole Expansion Simulations for 590 MPa Grade Steel Sheet

2010 ◽  
Vol 96 (9) ◽  
pp. 557-563 ◽  
Author(s):  
Kazuma Hashimoto ◽  
Toshihiko Kuwabara ◽  
Eiji Iizuka ◽  
Jeong-Whan Yoon
Keyword(s):  
Steel Sheet ◽  
Hole Expansion ◽  
Yield Functions ◽  
Grade Steel

On the Stretch-Flangeability of High Mn TWIP Steels

2010 ◽  
Vol 654-656 ◽  
pp. 278-281 ◽  
Author(s):  
Lei Chen ◽  
Jin Kyung Kim ◽  
Sung Kyu Kim ◽  
Kwang Geun Chin ◽  
Bruno C. De Cooman
Keyword(s):  
Strain Rate ◽  
Automotive Industry ◽  
Single Phase ◽  
Twip Steel ◽  
Uniform Elongation ◽  
Rate Sensitivity ◽  
Hole Expansion ◽  
Sheet Steels ◽  
Twip Steels ◽  
R Value

Edge stretching is an important formability issue when it comes to apply sheet steels to automotive industry. Anisotropy, strain hardening and toughness are closely related to hole expansion properties. In this paper, hole expansion properties of a high Mn fully austenitic Twinning Induced Plasticity (TWIP) steel are compared with three other types of single-phase sheet steels. The effects of r-value, n-value, m-value and post-uniform elongation on the edge stretch-flangeability are discussed. It was found that the post-uniform elongation and the strain rate sensitivity have a pronounced effect on hole expansion properties.

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