Computationally efficient welding distortion simulation techniques

D. Camilleri, T.G.F. Gray

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The study's aim is to improve the applicability of finite element analysis to the prediction of welding distortions, with particular emphasis on out-of-plane deformations. Robust simulation strategies are established which take account of material properties and joint configurations, but are at the same time computationally efficient. This is achieved by reducing the full transient thermo-elastoplastic analysis to variants of an uncoupled thermal, elasto-plastic and structural treatment. A two-dimensional cross-section thermal model was used to establish thermal transients. The maximum temperatures, experienced at each node during the welding cycle, were then used to link the thermal welding strains to the elasto-plastic and structural response of the welded structures. Three efficient models have been identified that reduce the transient analysis to a simple multi-load-step analysis and these were applied to sample butt-welded plates. The simulation techniques are supported by full-scale welding tests on steel plates. The evolution of angular distortion can be treated simply through non-linear, stepwise, static analyses. This captures important effects of restraint and material properties. The longitudinal bending distortion can then be established via simple elastic-perfectly plastic algorithms, through a fictitious elastic thermal load analysis.
Original languageEnglish
Pages (from-to)1365-1382
Number of pages17
JournalModelling and Simulation in Materials Science and Engineering
Volume13
Issue number8
DOIs
Publication statusPublished - Dec 2005

Fingerprint

Welding
welding
plastics
Elasto-plastic
Plastics
Material Properties
Materials properties
Simulation
simulation
welded structures
capture effect
Elasto-plastic Analysis
Thermal Model
Transient Analysis
Steel
Thermal load
Transient analysis
Thermoanalysis
Cross section
steels

Keywords

  • welding
  • welding distortion
  • welding simulation
  • welding deformations

Cite this

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Computationally efficient welding distortion simulation techniques. / Camilleri, D.; Gray, T.G.F.

In: Modelling and Simulation in Materials Science and Engineering , Vol. 13, No. 8, 12.2005, p. 1365-1382.

Research output: Contribution to journalArticle

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AU - Camilleri, D.

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AB - The study's aim is to improve the applicability of finite element analysis to the prediction of welding distortions, with particular emphasis on out-of-plane deformations. Robust simulation strategies are established which take account of material properties and joint configurations, but are at the same time computationally efficient. This is achieved by reducing the full transient thermo-elastoplastic analysis to variants of an uncoupled thermal, elasto-plastic and structural treatment. A two-dimensional cross-section thermal model was used to establish thermal transients. The maximum temperatures, experienced at each node during the welding cycle, were then used to link the thermal welding strains to the elasto-plastic and structural response of the welded structures. Three efficient models have been identified that reduce the transient analysis to a simple multi-load-step analysis and these were applied to sample butt-welded plates. The simulation techniques are supported by full-scale welding tests on steel plates. The evolution of angular distortion can be treated simply through non-linear, stepwise, static analyses. This captures important effects of restraint and material properties. The longitudinal bending distortion can then be established via simple elastic-perfectly plastic algorithms, through a fictitious elastic thermal load analysis.

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