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Influence of welding sequence on welding deformation and residual stress of a stiffened plate structure

Influence of welding sequence on welding deformation and residual stress of a stiffened plate structure
Influence of welding sequence on welding deformation and residual stress of a stiffened plate structure
An important consideration in the safe and efficient manufacture and operation of marine structures is the possible distortion, and consequential induced residual stress, owing to welding. This paper deals with welding simulation of a stiffened plate structure with longitudinal and transverse stiffeners using a thermal elasto-plastic FE method. Shell elements with section integration features are adopted to model the plate and stiffeners and solid elements to model the local detail of weld line region. Linear constraint equations are established between degrees of freedom of the shell and solid elements. Welding parameters of heat input, welding speed and welding sequence are considered in the analysis. A typical fillet-welded joint is studied and the thermal and mechanical results are compared with experimental values. Six welding sequences are simulated. The results demonstrate the specific influences of the different welding parameters on residual distortion and stress in a stiffened plate structure.
welding induced distortion, residual stress, welcing sequence, shell element, stiffened plate structure
0029-8018
271-280
Chen, Zhen
9746c8e0-1ee2-4234-9765-bc405bc4e3db
Chen, ZheChao
85ea3929-a17b-4a6b-a2ba-004567846090
Shenoi, R. Ajit
a37b4e0a-06f1-425f-966d-71e6fa299960
Chen, Zhen
9746c8e0-1ee2-4234-9765-bc405bc4e3db
Chen, ZheChao
85ea3929-a17b-4a6b-a2ba-004567846090
Shenoi, R. Ajit
a37b4e0a-06f1-425f-966d-71e6fa299960

Chen, Zhen, Chen, ZheChao and Shenoi, R. Ajit (2015) Influence of welding sequence on welding deformation and residual stress of a stiffened plate structure. Ocean Engineering, 106, 271-280. (doi:10.1016/j.oceaneng.2015.07.013).

Record type: Article

Abstract

An important consideration in the safe and efficient manufacture and operation of marine structures is the possible distortion, and consequential induced residual stress, owing to welding. This paper deals with welding simulation of a stiffened plate structure with longitudinal and transverse stiffeners using a thermal elasto-plastic FE method. Shell elements with section integration features are adopted to model the plate and stiffeners and solid elements to model the local detail of weld line region. Linear constraint equations are established between degrees of freedom of the shell and solid elements. Welding parameters of heat input, welding speed and welding sequence are considered in the analysis. A typical fillet-welded joint is studied and the thermal and mechanical results are compared with experimental values. Six welding sequences are simulated. The results demonstrate the specific influences of the different welding parameters on residual distortion and stress in a stiffened plate structure.

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Accepted/In Press date: 6 July 2015
e-pub ahead of print date: 29 July 2015
Published date: 15 September 2015
Keywords: welding induced distortion, residual stress, welcing sequence, shell element, stiffened plate structure
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 386148
URI: http://eprints.soton.ac.uk/id/eprint/386148
ISSN: 0029-8018
PURE UUID: 154ac3a7-97ee-4cdf-89b5-bf3f598595b7

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Date deposited: 28 Jan 2016 14:17
Last modified: 27 Apr 2022 08:39

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Contributors

Author: Zhen Chen
Author: ZheChao Chen
Author: R. Ajit Shenoi

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