Imperial College London
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DrZhutaoShao

Faculty of Engineering, Department of Mechanical Engineering

Research Associate
 
 
 
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Contact

 

z.shao12

 
 
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Location

 

City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Zhang:2019:1/012087,
author = {Zhang, R and Shao, Z and Lin, J and Zhang, R and Shao, Z and Lin, J},
doi = {1/012087},
pages = {1--8},
publisher = {IOP Publishing},
title = {A type of cruciform specimen applied to evaluate forming limits for boron steel under hot stamping conditions},
url = {http://dx.doi.org/10.1088/1757-899X/651/1/012087},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - The  ultra-high  strength  boron  steel  has  been  intensively  used  in  the hot stamping process to produce complex-shaped structural components in transportation industries. Forming limit  diagram  (FLD)  is  a  fundamental  and useful  tool  to  evaluate  the  formability  of  metallic materials under various forming conditions. Since the standardized Nakajima test and Marciniak test  are not  applicable  to  perform formability  tests  for  hot  stamping  applications due  to  the complex heating and cooling processes required, an in-plane testing method, in which cruciform specimens are  deformed under  hot  tamping  conditions in  a  Gleeble materials  simulator combined with a multi-axial tensile rig to convert an input force to an output biaxial force, has been successfully applied to assess the formability of aluminium alloys at elevated temperatures.  However, it  is  challenging to apply this in-plane testing  method for boron  steel due  to higher nonuniformityof temperature distribution in gauge region of the cruciform specimenat a higher temperature. In  this  paper, a  new  type  of  cruciform  specimen, together  with a new specimen heating strategy, has been proposed to improve the temperature distribution in the gauge region. The dimensions of the newly-designed cruciform specimen have been optimised by a thermo-electrical finite element model embedded with a UAMP subroutine in ABAQUS to improve the niformity of  temperature distribution in the gauge region.  In order to validate the new design of cruciform  specimen, biaxial tensile tests were  conducted under  hot stamping conditions by using the in-plane testing method.
AU  - Zhang,R
AU  - Shao,Z
AU  - Lin,J
AU  - Zhang,R
AU  - Shao,Z
AU  - Lin,J
DO  - 1/012087
EP  - 8
PB  - IOP Publishing
PY  - 2019///
SN  - 1757-8981
SP  - 1
TI  - A type of cruciform specimen applied to evaluate forming limits for boron steel under hot stamping conditions
UR  - http://dx.doi.org/10.1088/1757-899X/651/1/012087
UR  - https://iopscience.iop.org/article/10.1088/1757-899X/651/1/012087
UR  - http://hdl.handle.net/10044/1/74932
ER  -
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