Development of an inverse routine to predict residual stresses in the material based on a bending test

Abvabi, Akbar, Rolfe, Bernard, Hodgson, Peter D. and Weiss, Matthias 2013, Development of an inverse routine to predict residual stresses in the material based on a bending test, Key engineering materials, vol. 554-557, pp. 949-956, doi: 10.4028/www.scientific.net/KEM.554-557.949.

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Title Development of an inverse routine to predict residual stresses in the material based on a bending test
Author(s) Abvabi, Akbar
Rolfe, BernardORCID iD for Rolfe, Bernard orcid.org/0000-0001-8516-6170
Hodgson, Peter D.
Weiss, MatthiasORCID iD for Weiss, Matthias orcid.org/0000-0002-1845-6343
Journal name Key engineering materials
Volume number 554-557
Start page 949
End page 956
Total pages 8
Publisher Trans Tech Publications
Place of publication Stafa-Zurich, Switzerland
Publication date 2013
ISSN 1013-9826
Keyword(s) inverse approach
residual stress
skin passing
solid-shell element
Summary Bending and reverse bending are the dominant material deformations in roll forming, and hence property data derived from bend tests could be more relevant than tensile test data for numerical simulation of a roll forming process. Recent investigations have shown that residual stresses change the material behavior close to the yield in a bending test. So, residual stresses introduced during prior steel processing operations may affect the roll forming process, and therefore they need to be included in roll forming simulations to achieve improved model accuracy. Measuring the residual stress profile experimentally is time consuming and has limited accuracy while analytical models that are available require detailed information about the pre-processing conditions that is generally not available for roll forming materials. The main goal of this study is to develop an inverse routine that determines a residual stress profile through the material thickness based on experimental pure bend test data. A numerical model of the skin passing (temper rolling) process is performed to introduce a residual stress profile in DP780 steel sheet. The skin passed strips are used in a pure bending simulation to record moment-curvature data and this data is then applied in an inverse analysis to predict the residual stress profile in the material. Comparison of the residual stress profile predicted by the inverse routine with that calculated by finite element analysis (FEA) indicates an inverse approach combined with pure bend test may present an alternative to predict residual stresses in sheet metals.
Notes This paper was presented at the 2013 16th ESAFORM Conference on Material Forming
Language eng
DOI 10.4028/www.scientific.net/KEM.554-557.949
Field of Research 091307 Numerical Modelling and Mechanical Characterisation
091308 Solid Mechanics
091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30057630

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