Imperial College London
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DrZhushengShi

Faculty of Engineering, Department of Mechanical Engineering

Advanced Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 1806zhusheng.shi

 
 
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Location

 

705City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rong:2021:10.1016/j.jmatprotec.2021.117168,
author = {Rong, Q and Shi, Z and Li, Y and Lin, J},
doi = {10.1016/j.jmatprotec.2021.117168},
journal = {Journal of Materials Processing Technology},
pages = {1--12},
title = {Constitutive modelling and its application to stress-relaxation age forming of AA6082 with elastic and plastic loadings},
url = {http://dx.doi.org/10.1016/j.jmatprotec.2021.117168},
volume = {295},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A novel constitutive model has been proposed in this study that predicts the different stress-relaxation ageing (SRA) behaviour of AA6082-T6 with elastic and plastic loading strains, extending the applications of stress-relaxation age forming (SRAF) from conventional elastically loaded panels to complex-shaped panels under plastically loaded conditions. The particular contributions of loading strain levels in elastic or plastic regions on the evolution of microstructural variables (i.e., inter-particle spacing, dislocation density, and precipitate length), yield strength and stress-relaxation behaviour during SRA process are concurrently modelled. The decreasing creep threshold stress and the increasing dislocation recovery effect from annealing with increasing initial strain in the plastic region have been proposed and introduced in the model. TEM analysis has been performed to quantify the effect of loading strain and ageing time on the evolution of β″ precipitates, and further calibrate the material model. Furthermore, the established model has been implemented into FE simulation to optimise the tool surface design of a train body panel component with complex and large curvatures, and corresponding SRAF tests have been conducted with the optimised tool surface. The maximum shape deviation from the objective shape of a component with a dimension of 8203003mm3 has been controlled within 3mm, demonstrating the feasibility of the developed material model for SRAF in industrial applications, especially for highly demanded complex-shaped components.
AU  - Rong,Q
AU  - Shi,Z
AU  - Li,Y
AU  - Lin,J
DO  - 10.1016/j.jmatprotec.2021.117168
EP  - 12
PY  - 2021///
SN  - 0924-0136
SP  - 1
TI  - Constitutive modelling and its application to stress-relaxation age forming of AA6082 with elastic and plastic loadings
T2  - Journal of Materials Processing Technology
UR  - http://dx.doi.org/10.1016/j.jmatprotec.2021.117168
UR  - https://www.sciencedirect.com/science/article/pii/S092401362100128X?via%3Dihub
UR  - http://hdl.handle.net/10044/1/88117
VL  - 295
ER  -
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