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{Zhang:2021:10.1016/j.mex.2021.101234,
author = {Zhang, R and Shi, Z and Shao, Z and Yardley, V and Lin, J},
doi = {10.1016/j.mex.2021.101234},
journal = {MethodsX},
title = {An effective method for determining necking and fracture strains of sheet metals},
url = {http://dx.doi.org/10.1016/j.mex.2021.101234},
volume = {8},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Biaxial tensile testing methods using cruciform specimens have been developed in the last few decades for the determination of forming limit diagrams (FLDs) and fracture forming limit diagrams (FFLDs) for sheet metals. One of the difficulties associated with this test geometry is the lack of a widely accepted method to determine the necking and fracture strains which are necessary to construct these diagrams. In this study, a novel spatio-temporal method has been proposed for the determination of necking and fracture strains. In the method, two rectangular zones: the base zone (BZ) and the reference zone (RZ) are selected at the location where fracture initiates. The zone RZ includes the zone BZ and both zones have the same side length in the direction parallel to the necking band but different side length in the perpendicular direction. By plotting the thickness reduction within RZ against that in BZ, the onset of localised necking can be determined by finding the intersection of the two straight lines fitted separately using the data in the initial and final stages of deformation. The corresponding limit strains are then determined using the strains within the zone BZ. The method has been successfully applied to uniaxial tensile tests on AA6082 and boron steel dog-bone specimens, and to equi-biaxial tensile tests on AA5754 cruciform specimens.
AU  - Zhang,R
AU  - Shi,Z
AU  - Shao,Z
AU  - Yardley,V
AU  - Lin,J
DO  - 10.1016/j.mex.2021.101234
PY  - 2021///
SN  - 2215-0161
TI  - An effective method for determining necking and fracture strains of sheet metals
T2  - MethodsX
UR  - http://dx.doi.org/10.1016/j.mex.2021.101234
UR  - http://hdl.handle.net/10044/1/86880
VL  - 8
ER  -
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