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Research on the sensitivity of material parameters to cross-sectional deformation of thin-walled rectangular tube in rotary draw bending process

Published online by Cambridge University Press:  25 May 2016

Jie Dong ,
Yuli Liu  and
He Yang
Jie Dong
Affiliation:
State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Yuli Liu*
Affiliation:
State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
He Yang
Affiliation:
State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The fluctuation of material parameters and coupling effects of them have significant effects on cross-sectional deformation of rectangular tube in rotary draw bending process. So, in this research, a global sensitivity analysis (GSA) system was established based on the combination of Morris' GSA method and 3-D finite element method, and the reliability of the system is validated. Based on the system built, the sensitivity values of different material parameters combinations were analyzed. The results show that (i) the maximum cross-sectional deformation ratio decreases with the increase of Young's module E and strain hardening exponent n, while the effects of strength coefficient K, initial yield stress σS, and thickness anisotropy exponent γ on cross-sectional deformation are opposite to those of E and n, (ii) the groups which contain E and γ simultaneously show greater sensitivity and the effect of group only including E and γ on cross-sectional deformation is the most remarkable, while the most insensitive group in different combinations contains K, and (iii) mostly, the sensitivity values of coupling groups to cross-sectional deformation are larger than those of one-parameter groups.

Keywords

thin-walled rectangular tuberotary draw bendingMorris' global sensitivity analysiscoupling effects of material parameterscross-sectional deformation
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 12 , 28 June 2016 , pp. 1784 - 1792
Copyright
Copyright © Materials Research Society 2016 

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