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Finite element-based method for residual stresses and plastic strains in cold-formed steel hollow sections
Ye Yao1; Wai-Meng Quach1; Ben Young2
2019
Source PublicationEngineering Structures
ISSN0141-0296
Volume188Pages:24-42
Abstract

Residual stresses and plastic strains in steel tubes are induced by their manufacturing processes and play an important role in determining their mechanical and structural behaviour. The manufacturing process of cold-formed steel hollow sections can be divided into four main stages: (1) the coiling and uncoiling of a steel strip, (2) the transverse bending of the uncoiled strip into a circular shape, (3) the welding of the circular tube along the longitudinal strip edges, and (4) the shaping of the welded circular steel tube into a specific cross-sectional shape. In this paper, a finite element-based method is presented for predicting residual stresses and equivalent plastic strains in cold-formed steel hollow sections (including elliptical, square, and rectangular shapes of both normal grade steel and high strength steel). In this method, residual stresses and equivalent plastic strains due to the coiling, uncoiling and transverse bending operations are predicted analytically, and applied as the initial state for the subsequent finite element simulations of both welding and shaping operations. Predictions from this method show satisfying agreement with experimental measurements, which demonstrate the validity of the proposed method. This method can predict the distributions of residual stresses and equivalent plastic strains across the thickness and over the cross section, which are too complex to be measured completely in laboratory. The method provides a tool for investigating the effects of different material and forming parameters on the resulting cold work and structural behaviour.

KeywordResidual Stresses Shaping Finite Element Simulation Hollow Sections Cold Work Cold Forming
DOIhttps://doi.org/10.1016/j.engstruct.2019.03.010
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Civil
WOS IDWOS:000465058200003
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Citation statistics
Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorWai-Meng Quach
Affiliation1.Department of Civil and Environmental Engineering, University of Macau, Macau, China
2.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Ye Yao,Wai-Meng Quach,Ben Young. Finite element-based method for residual stresses and plastic strains in cold-formed steel hollow sections[J]. Engineering Structures,2019,188:24-42.
APA Ye Yao,Wai-Meng Quach,&Ben Young.(2019).Finite element-based method for residual stresses and plastic strains in cold-formed steel hollow sections.Engineering Structures,188,24-42.
MLA Ye Yao,et al."Finite element-based method for residual stresses and plastic strains in cold-formed steel hollow sections".Engineering Structures 188(2019):24-42.
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