Combined Solid and Shell Element Modelling of Welding
Finite element calculations of residual stress distribution in a welded component from a hollow square section inconel tube are presented in this paper, figure 1. Shell element can be successfully used in finite element calculations of thin walled structures . However, in the weld and the heat affected zone (HAZ) shell elements may not be sufficient, since the through thickness stress gradient is high in these regions. In the study presented here a combination of eight-nodes solid elements and four-nodes shell elements is used. The solid elements are used in and near the weld and shell elements are used elsewhere. This combination of solid elements and shell elements reduces the number of degrees of freedom in the problem in comparison with the use of solid elements only.
Unable to display preview. Download preview PDF.
- 3.M. Jonsson, L. Karlsson and L. E. Lindgren “Deformations and Stresses in Butt- Welding of Large Plates” in R. W. Levis (editor): Numerical Methods in Heat Transfer, Volume III, pp 35–58, Wiley, London, 1985.Google Scholar
- 4.L. Karlsson and L. E. Lindgren “Combined Heat and Stress-Strain Calculations” in M. Rappaz, M. R. Ozgu and K. W. Mahin (editors): Modelling of Casting, Welding and Advanced Solidification Processes V pp 187–202 (1991), (Proc. of the Int. Conf.on Modeling of Casting, Welding and Advanced Solidification Processes, Davos, Switzerland, September 16–21, 1990).Google Scholar
- 5.J. Goldak “Modeling Thermal Stresses and Distortions in Welds”, in S.A. David and J. M. Vitek (editors): Recent Trends in Welding Science and Technology, ASM INTERNATIONAL, (Proc. of the 2nd Int. Conf. on Trends in Welding Research, Gatlinburg, Tennessee, USA, 14–18 May, 1989.) Materials Park Ohio, 44073 USA 1990, pp. 71–82.Google Scholar
- 7.Volvo Flygmotor AB, 461 81 Trollhättan, Sweden (Mr Ronny Jonsson).Google Scholar