DP600 dual phase steel thermo-elasto-plastic constitutive model considering strain rate and temperature influence on FEM residual stress analysis of laser welding

2018 ◽  
Vol 35 ◽  
pp. 407-419 ◽  
Author(s):  
S. Liu ◽  
A. Kouadri-Henni ◽  
A. Gavrus
Keyword(s):  
Residual Stress ◽  
Constitutive Model ◽  
Laser Welding ◽  
Strain Rate ◽  
Stress Analysis ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Temperature Influence ◽  
Residual Stress Analysis

Deformation Behaviors and Constitutive Model of DP1000 under Different Strain Rates

2017 ◽  
Vol 898 ◽  
pp. 810-817 ◽  
Author(s):  
Ran Wei ◽  
Ren Bo Song ◽  
Long Jiang ◽  
Heng Jun Cai
Keyword(s):  
Constitutive Model ◽  
Strain Rate ◽  
Strain Hardening ◽  
Dual Phase Steel ◽  
Constitutive Models ◽  
Rate Sensitivity ◽  
Dual Phase ◽  
Strain Rates ◽  
Deformation Behaviors ◽  
Means Of Transmission

The DP1000 cold-rolled dual phase steel, the thickness of which is 1.2 mm, was required to do the tensile test under nine different strain rates from 10-4 s-1 to 1000 s-1. The mechanical properties and morphologies of the steel were obtained and analyzed. According to the C-J model, the plastic deformation characteristics of dual phase steel under different strain rates were studied. By means of transmission electron microscope (TEM), the morphologies of ferrite and martensite in the dynamic were observed. Finally, the constitutive models of quasi-static and high strain rate were established by using the modified Johnson-Cook model. The results reveal that DP1000 dual phase steel has obvious strain rate sensitivity, and it is a relatively pure ferrite and martensite dual phase structure. There are two stage strain hardenging characteristics in DP1000. In the first stage, the strain hardening ability of ferrite is higher, and the second stage is martensite deformation stage, the strain hardening ability is lower. The modified J-C constitutive model has high fitting effect, and the experimental results are matched with the fitting values.

scholarly journals Residual Stress Analysis of Laser Welding Between Output Needle and Helix

2021 ◽  
Vol 1802 (2) ◽  
pp. 022088
Author(s):  
Wei Su ◽  
Wenhao Luo ◽  
Xianshan Dong ◽  
Renhuai Liu
Keyword(s):  
Residual Stress ◽  
Laser Welding ◽  
Stress Analysis ◽  
Residual Stress Analysis

Residual Stress Analysis in Weldments-Theoretical Approach

1996 ◽  
Vol 29 (4) ◽  
pp. 7
Author(s):  
S. Murugan ◽  
P. V. Kumar ◽  
Baldev Raj ◽  
M. S. C. Bose
Keyword(s):  
Residual Stress ◽  
Stress Analysis ◽  
Theoretical Approach ◽  
Residual Stress Analysis

Hybrid experimental-numerical concept of residual stress analysis in laser weldments

2001 ◽  
Vol 41 (4) ◽  
pp. 343-350 ◽  
Author(s):  
D. Holstein ◽  
L. Salbut ◽  
M. Kujawinska ◽  
W. Jüptner
Keyword(s):  
Residual Stress ◽  
Stress Analysis ◽  
Residual Stress Analysis ◽  
Numerical Concept
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