TITLE:
High Effective FE Simulation Methods for Deformation and Residual Stress by Butt Welding of Thin Steel Plates
AUTHORS:
Mikihito Hirohata, Yoshito Itoh
KEYWORDS:
Welding Deformation, Residual Stress, Butt Welding, FEM, Shell Element
JOURNAL NAME:
Engineering,
Vol.6 No.9,
August
5,
2014
ABSTRACT:
In order to propose
high effective simulation using finite element method (FEM) for predicting
deformation and residual stress generated by one pass butt welding, a series of
numerical analyses were carried out. By idealizing the movement of heat
source (the instantaneous heat input method), the tendency of welding
out-of-plane deformation and the residual stress distribution could be
predicted. The computing time was around 9% of that by the precise model with
considering the movement of heat source. On the other hand, applicability of
two dimensional shell elements instead of generally used three dimensional
solid elements was examined. The heat input model with considering the
temperature distribution in the thickness direction was proposed for the simulation
by using the shell elements. It was confirmed that the welding out-of-plane
deformation and residual stress could be predicted with high accuracy by the
model with shell elements and the distributed heat input methods. The computing
time was around 8% of that by the precise model with solid elements.