Imperial College London
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DrLiliangWang

Faculty of Engineering, Department of Mechanical Engineering

Reader in Mechanical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 3648liliang.wang Website

 
 
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Location

 

518City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{He:2020:10.1016/j.ijmecsci.2019.105321,
author = {He, Z and Zhu, H and Lin, Y and Politis, DJ and Wang, L and Yuan, S},
doi = {10.1016/j.ijmecsci.2019.105321},
journal = {International Journal of Mechanical Sciences},
title = {A novel test method for continuous nonlinear biaxial tensile deformation of sheet metals by bulging with stepped-dies},
url = {http://dx.doi.org/10.1016/j.ijmecsci.2019.105321},
volume = {169},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In this paper, a novel test method named bulging with stepped-dies is proposed to overcome the difficulty of traditionaltest methods in realizing continuous nonlinear loading paths from initial yield up to fracture on a sheet metal. Toachieve this aim, the section shape of a stepped-die cavity is varied with increasing depth. During bulging with astepped-die, the stress state at the pole of bulging area of the sheet changes continuously with the increase in bulgingheight, which results in a specific nonlinear loading path. A theoretical model is established to calculate the stresscomponents at the pole based on the assumption that the bulged surface near the pole was approximated by arotational ellipsoid. Bulging experiments with three different stepped-dies are performed by using ST16 steel sheet.Stress and strain paths up to fracture and equivalent stress-strain curves at the pole are analyzed and compared withthe results of bulging with elliptical dies. It is shown that continuous nonlinear loading paths can be effectively realizedthrough bulging with stepped-dies and the stress ratio at the pole changes from 0.5 up to 2.0 at most in one bulgingexperiment. The feasibility of the novel test method is validated successfully. And the experimental data obtained areuseful to determine constitutive and forming limit models suitable for complex loading conditions.
AU  - He,Z
AU  - Zhu,H
AU  - Lin,Y
AU  - Politis,DJ
AU  - Wang,L
AU  - Yuan,S
DO  - 10.1016/j.ijmecsci.2019.105321
PY  - 2020///
SN  - 0020-7403
TI  - A novel test method for continuous nonlinear biaxial tensile deformation of sheet metals by bulging with stepped-dies
T2  - International Journal of Mechanical Sciences
UR  - http://dx.doi.org/10.1016/j.ijmecsci.2019.105321
UR  - http://hdl.handle.net/10044/1/74896
VL  - 169
ER  -
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