TY - GEN
T1 - Stress-Relaxation Age Forming of a Component with Complex and Large Curvatures: Simulation and Manufacturing
AU - Rong, Qi
AU - Shi, Zhusheng
AU - Li, Yong
AU - Lin, Jianguo
N1 - Publisher Copyright:
© 2021, The Minerals, Metals & Materials Society.
PY - 2021/7
Y1 - 2021/7
N2 - Stress-relaxation age forming (SRAF) of a component (820 × 300 × 3 mm3 ) with complex and large curvatures has been simulated and a corresponding SRAF test of an Al–Mg–Si alloy, AA6082-T6, has been carried out in this study. An FE model is established to simulate the stress-relaxation ageing (SRA) behaviour of AA6082-T6 during SRAF at various stress levels, ranging from elastic to plastic regions, and a unified constitutive model for SRA of the material has been implemented in the finite element (FE) software ABAQUS via the user-defined subroutine CREEP. An optimised tool surface was determined from the FE simulation through springback predication and compensation and was used for manufacturing test. A good agreement of the formed shape has been achieved between the FE simulation and the SRAF test, with a maximum shape error below 4 mm, satisfying the industrial requirement. The hardness results from the formed plate showed an insignificant change of strength during SRAF, and are in good agreement with the simulation. The effects of the initial plastic strain and creep strain generated during loading and stress-relaxation stages on the formed shape have also been analysed.
AB - Stress-relaxation age forming (SRAF) of a component (820 × 300 × 3 mm3 ) with complex and large curvatures has been simulated and a corresponding SRAF test of an Al–Mg–Si alloy, AA6082-T6, has been carried out in this study. An FE model is established to simulate the stress-relaxation ageing (SRA) behaviour of AA6082-T6 during SRAF at various stress levels, ranging from elastic to plastic regions, and a unified constitutive model for SRA of the material has been implemented in the finite element (FE) software ABAQUS via the user-defined subroutine CREEP. An optimised tool surface was determined from the FE simulation through springback predication and compensation and was used for manufacturing test. A good agreement of the formed shape has been achieved between the FE simulation and the SRAF test, with a maximum shape error below 4 mm, satisfying the industrial requirement. The hardness results from the formed plate showed an insignificant change of strength during SRAF, and are in good agreement with the simulation. The effects of the initial plastic strain and creep strain generated during loading and stress-relaxation stages on the formed shape have also been analysed.
KW - Al–Mg–Si alloy
KW - Creep age forming
KW - FE simulation
KW - Large and complex curvature
KW - Stress-relaxation age forming
UR - https://www.scopus.com/pages/publications/85112514000
U2 - 10.1007/978-3-030-75381-8_77
DO - 10.1007/978-3-030-75381-8_77
M3 - Conference article published in proceeding or book
AN - SCOPUS:85112514000
SN - 9783030753801
T3 - Minerals, Metals and Materials Series
SP - 921
EP - 934
BT - Forming the Future - Proceedings of the 13th International Conference on the Technology of Plasticity
A2 - Daehn, Glenn
A2 - Cao, Jian
A2 - Kinsey, Brad
A2 - Tekkaya, Erman
A2 - Vivek, Anupam
A2 - Yoshida, Yoshinori
PB - Springer Science and Business Media Deutschland GmbH
T2 - 13th International Conference on the Technology of Plasticity, ICTP 2021
Y2 - 25 July 2021 through 30 July 2021
ER -