Vol. 2, No. 3, pp. 236-241 (2006)
OPTIMIZATION OF GROOVE DESIGN IN THICK PLATES WELDING
Jia Liwei, Zhou Hongbin and Zhang Mingli
Civil Engineering and Mechanics Institute, YANSHAN University,
Qinhuangdao, Hebei province, P.R.China,066004
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ABSTRACT
Groove design affects thick plates’ residual stress distribution seriously. So optimization of groove design in thick plates’ welding is an important work. In order to do this work better we use finite element method to quantitatively evaluate the effects of groove design. Groove design plays a very important role in residual stress distribution. Although we may butt weld two thick plates together by several kinds of groove design, the final residual stress distribution will be different.
In this paper we use three kinds of groove design to butt weld two same thick plates together. Thickness of the plate is 25mm. Finite element method has been employed to evaluate the final residual stress distribution. Utilizing of ANSYS code is efficient when we try to find the residual stress distributions by finite element method. Some functions of ANSYS such as “couple field” and “element birth and death” are adopted. Temperature related thermophysical material properties are considered. Some necessary measurements should be used to prevent convergence problems in this nonlinear analysis procedure.
The results suggest clearly that different groove design induces different residual stress distribution. We should take care of groove design before welding. Also numerical analysis of residual stress can help us to estimate residual stress distribution efficiently. At last we give some suggestions about thick plates groove design.
KEYWORDS
residual stress(RS), finite element method(FEM), thick plate, groove design(GD), weld
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