The effects of welding-induced residual stress on the buckling collapse behaviours of stiffened panels

Shen Li, Simon Benson

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

An assessment is conducted in this paper for the effects of welding-induced residual stress on the elastoplastic buckling collapse behaviour of stiffened panels subjected to in-plane compression. A series of nonlinear finite element analyses are completed which covers a range of plate slenderness ratios (β = 1.0~4.0) and column slenderness ratios (λ = 0.2~1.2) typical in marine application. The finite element models incorporate an idealised distribution of welding-induced residual stress with average severity. The numerical investigation indicates a reduced ultimate strength and increased ultimate strain due to the residual stress, as compared with the initial stress-free condition. Hence, a set of design formulae are proposed with the aid of regression analysis to predict the ultimate strength reduction and ultimate strain variation. The proposed design formulae are employed in combination with an empirical load-shortening curve formulation and simplified progressive collapse method to predict the ultimate bending capacity reduction of a box girder model. Validation is completed through equivalent finite element analysis.
Original languageEnglish
Title of host publicationDevelopments in Maritime Technology and Engineering
Subtitle of host publicationCelebrating 40 years of Teaching in Naval Architecture and Ocean Engineering in Portugal and the 25th anniversary of CENTEC
EditorsC. Guedes Soares, T.A. Santos
Place of PublicationLondon
Pages557-566
Number of pages10
Edition1
ISBN (Electronic)9781003216582
DOIs
Publication statusPublished - 8 Jul 2021
Event5th International Conference on Maritime Technology and Engineeering - Centre for Marine Technology and Ocean Engineering (CENTEC), Lisbon, Portugal
Duration: 16 Nov 202019 Nov 2020
Conference number: 5TH
https://tecnico.ulisboa.pt/en/events/martech-2020-5th-international-conference-on-maritime-technology-and-engineering/
http://www.centec.tecnico.ulisboa.pt/martech2020/

Conference

Conference5th International Conference on Maritime Technology and Engineeering
Abbreviated titleMARTECH 2020
Country/TerritoryPortugal
CityLisbon
Period16/11/2019/11/20
Internet address

Keywords

  • welding-induced residual stress
  • buckling
  • collapse
  • behaviours
  • stiffened panels
  • ship hull strength
  • in-plane compression

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