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Accurate Prediction of Mechanical Properties for Cold-formed Stainless Steel Sections
Quach Stephen; Qiu Pei
2009-07
Source PublicationJournal of Yantai University(Natural Science and Engineering Edition)
ISSN1004-8820
Volume22Issue:3Pages:217-228
Abstract

The cold work from the manufacturing process of cold-formed sections causes a significant change in the mechanical behaviour and enhances the strength of the material.This paper presents the results of a study on the accurate prediction of the mechanical properties of both virgin stainless sheet materials and cold-worked materials of cold-formed stainless steel sections.This paper first presents a new stress-strain model for stainless steels,which is capable of accurate predictions over the full ranges of both tensile and compressive strains.The new stress-strain model is defined using the three basic Ramberg-Osgood parameters and is based on a careful interpretation of existing experimental data.In the second part of the paper,a finite element method is then presented for predicting the stress-strain behaviour of cold-worked materials,including corner materials and flat materials,in press-braked stainless steel sections.In this method,the effect of cold working on the stress-strain behaviour of cold-worked materials is account for by means of a numerical simulation of the manufacturing process of the press-braked section,with the resulting residual stresses and equivalent plastic strains specified as the initial state in a subsequent finite element simulation of coupon tests.This method is capable of predicting both tensile and compressive stress-strain behaviour of cold-worked materials.The accuracies of both the new stress-strain model and the finite element method are demonstrated by comparing its predictions with experimental stress-strain curves.The proposed finite element method together with the new stress-strain model can be applied in the future in a development of a direct relationship between the virgin material properties and cold-worked material ones.

KeywordCold Forming Stainless Steel Stress-strain Model Cold Work Corners Strength Enhancement Finite Element Simulation
DOIhttp://doi.org/10.13951/j.cnki.37-1213/n.2009.03.004
Language英语
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Document TypeJournal article
专题Faculty of Science and Technology
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
AffiliationDepartment of Civil and Environmental Engineering,University of Macau,Macau,China
First Author AffilicationUniversity of Macau
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Quach Stephen,Qiu Pei. Accurate Prediction of Mechanical Properties for Cold-formed Stainless Steel Sections[J]. Journal of Yantai University(Natural Science and Engineering Edition),2009,22(3):217-228.
APA Quach Stephen,&Qiu Pei.(2009).Accurate Prediction of Mechanical Properties for Cold-formed Stainless Steel Sections.Journal of Yantai University(Natural Science and Engineering Edition),22(3),217-228.
MLA Quach Stephen,et al."Accurate Prediction of Mechanical Properties for Cold-formed Stainless Steel Sections".Journal of Yantai University(Natural Science and Engineering Edition) 22.3(2009):217-228.
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