Imperial College London
Alternate

Prof Ambrose Taylor

Faculty of Engineering, Department of Mechanical Engineering

Professor of Materials Engineering
 
 
 
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Contact

 

+44 (0)20 7594 7149a.c.taylor Website

 
 
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Assistant

 

Miss Valerie Crawford +44 (0)20 7594 7083

 
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Location

 

515City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sorce:2021:10.1007/s00170-021-06628-z,
author = {Sorce, FS and Ngo, S and Lowe, C and Taylor, AC},
doi = {10.1007/s00170-021-06628-z},
journal = {International Journal of Advanced Manufacturing Technology},
pages = {1--18},
title = {Quantification and analysis of coating surface strains in T-bend tests},
url = {http://dx.doi.org/10.1007/s00170-021-06628-z},
volume = {113},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Pre-painted sheet metal (e.g. coil coated with polyester-melamine) undergoes large deformations when formed into architectural cladding or white goods. The coatings provide protection and superior aesthetics, so must withstand failure by cracking or delamination during forming. The T-bend test is an industry standard test used to qualitatively compare the formability of coatings and mimics the conditions experienced during hemming processes. The failure of coatings during forming is strain governed, so understanding the surface strains in the T-bend test is of great interest to manufacturers. For the first time, the maximum surface strains experienced during the T-bend test have been predicted using finite element modelling (FEM) and verified experimentally using digital image correlation. The experimental shapes of the deformed blank are compared with the FEM results for further verification. In addition, a novel analytical model is proposed to determine the maximum surface strains. It is shown that strains of up to ~ 225% are applied during a 0T test (bent around a zero thickness spacer) reducing to ~ 23% at 4T (bent around a four times sheet thickness spacer). The finite element model, experimental data and new analytical model show excellent agreement and indicate that behaviour is independent of the substrate thickness or material used. Understanding the strain behaviour quantifies the formerly qualitative T-bend. This will improve the efficacy of the test, allowing metal formers and coating developers to better understand the performance requirements, to reduce waste and to develop better coatings.
AU  - Sorce,FS
AU  - Ngo,S
AU  - Lowe,C
AU  - Taylor,AC
DO  - 10.1007/s00170-021-06628-z
EP  - 18
PY  - 2021///
SN  - 0178-0026
SP  - 1
TI  - Quantification and analysis of coating surface strains in T-bend tests
T2  - International Journal of Advanced Manufacturing Technology
UR  - http://dx.doi.org/10.1007/s00170-021-06628-z
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000613610300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://link.springer.com/article/10.1007%2Fs00170-021-06628-z
UR  - http://hdl.handle.net/10044/1/86794
VL  - 113
ER  -
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