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Local-global mode interaction in thin-walled inelastic rectangular hollow section struts part 1: nonlinear finite element analysis
File(s)
paper_tws_Revised1JS.pdf (3.59 MB)
Accepted version
Author(s)
Shen, Jiajia
Wadee, MA
Type
Journal Article
Abstract
Mass efficient thin-walled rectangular hollow section (RHS) struts have been shown to be susceptible to local–global mode interaction and exhibit sensitivity to imperfections. Material nonlinearity may increase the imperfection sensitivity of such members further and affect the final failure mode. Nonlinear finite element (FE) models for welded inelastic thin-walled RHS struts with pre-defined local and global geometric imperfections alongside residual stresses are developed within the commercial package Abaqus and validated against two independent experimental studies. Based on the validated FE model, the effects of material nonlinearity and residual stresses from welding on the ultimate load, mechanical behaviour and the imperfection sensitivity of struts are investigated. A simplified method to determine the initial geometric imperfection amplitude introduced in the FE model with residual stresses explicitly modelled within the ECCS framework is proposed for the first time. The experimental and numerical results in conjunction with existing experimental results from the literature are employed in the companion paper for the assessment of the Effective Width Method and Direct Strength Method, which also forms the basis for a new set of design recommendations.
Date Issued
2019-12-01
Date Acceptance
2019-05-08
Citation
Thin-Walled Structures, 2019, 145
URI
DOI
ISSN
0263-8231
Publisher
Elsevier
Journal / Book Title
Thin-Walled Structures
Volume
145
Copyright Statement
© 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Civil Engineering
Publication Status
Published
Article Number
106183
Date Publish Online
2019-05-23